Subject Name: Testing of Materials (TOM)
Subject code: OML751
Unit I: Introduction to Materials Testing
B.E. Mechanical Engineering
Final year, VII Semester.
Open Elective Subject
[As per Anna university syllabus; R-2017]
Metallurgy is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements, their intermetallic compounds, and their mixtures, which are called alloys. Metallurgy is also the technology of metals: the way in which science is applied to the production of metals, and the engineering of metal components for use in products for consumers and manufacturers. The production of metals involves the processing of ores to extract the metal they contain, and the mixture of metals, sometimes with other elements, to produce alloys. Metallurgy is distinguished from the craft of metalworking, although metalworking relies on metallurgy, as medicine relies on medical science, for technical advancement.
Metallurgy is subdivided into ferrous metallurgy (sometimes also known as black metallurgy) and non-ferrous metallurgy or colored metallurgy. Ferrous metallurgy involves processes and alloys based on iron while non-ferrous metallurgy involves processes and alloys based on other metals. The production of ferrous metals accounts for 95 percent of world metal production.
Impact of RoHS Legislation on the High Performance Industry
In 2006 the European Union issued a Directive on the Restriction of Hazardous Substances (RoHS) which among other materials banned the use of lead in electronics. The Aerospace and Defense (A&D) industry in the US designs and manufactures products that carry more than three billion passengers worldwide on any given day as well as systems which are vital to our national security. In order to transition to lead-free electronics the A&D industry demands careful analysis and research into the performance, reliability and safety of these materials in order to maintain public safety and assure our war-fighters’ mission success is not compromised or risked. In this effort the College of Engineering at Tuskegee University and the Boeing Company has teamed to fill some of the many knowledge gaps that surround this new technology. Researchers at Tuskegee are undertaking an effort to understand the growth mechanism associated with the formation of tin whiskers and how to mitigate these risks. Since the formation of binary compounds are suspected of causing fractures in these new Pb-free solder alloys, Tuskegee is studying the migration of binary compounds in a root cause investigation. Also Tuskegee is studying the effects tin whiskers may have on the ability of conformal coatings to protect Circuit Boards from corrosion.
Subject Name: Testing of Materials (TOM)
Subject code: OML751
Unit I: Introduction to Materials Testing
B.E. Mechanical Engineering
Final year, VII Semester.
Open Elective Subject
[As per Anna university syllabus; R-2017]
Metallurgy is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements, their intermetallic compounds, and their mixtures, which are called alloys. Metallurgy is also the technology of metals: the way in which science is applied to the production of metals, and the engineering of metal components for use in products for consumers and manufacturers. The production of metals involves the processing of ores to extract the metal they contain, and the mixture of metals, sometimes with other elements, to produce alloys. Metallurgy is distinguished from the craft of metalworking, although metalworking relies on metallurgy, as medicine relies on medical science, for technical advancement.
Metallurgy is subdivided into ferrous metallurgy (sometimes also known as black metallurgy) and non-ferrous metallurgy or colored metallurgy. Ferrous metallurgy involves processes and alloys based on iron while non-ferrous metallurgy involves processes and alloys based on other metals. The production of ferrous metals accounts for 95 percent of world metal production.
Impact of RoHS Legislation on the High Performance Industry
In 2006 the European Union issued a Directive on the Restriction of Hazardous Substances (RoHS) which among other materials banned the use of lead in electronics. The Aerospace and Defense (A&D) industry in the US designs and manufactures products that carry more than three billion passengers worldwide on any given day as well as systems which are vital to our national security. In order to transition to lead-free electronics the A&D industry demands careful analysis and research into the performance, reliability and safety of these materials in order to maintain public safety and assure our war-fighters’ mission success is not compromised or risked. In this effort the College of Engineering at Tuskegee University and the Boeing Company has teamed to fill some of the many knowledge gaps that surround this new technology. Researchers at Tuskegee are undertaking an effort to understand the growth mechanism associated with the formation of tin whiskers and how to mitigate these risks. Since the formation of binary compounds are suspected of causing fractures in these new Pb-free solder alloys, Tuskegee is studying the migration of binary compounds in a root cause investigation. Also Tuskegee is studying the effects tin whiskers may have on the ability of conformal coatings to protect Circuit Boards from corrosion.
FellowBuddy.com is an innovative platform that brings students together to share notes, exam papers, study guides, project reports and presentation for upcoming exams.
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Benefits:-
# Students can catch up on notes they missed because of an absence.
# Underachievers can find peer developed notes that break down lecture and study material in a way that they can understand
# Students can earn better grades, save time and study effectively
Our Vision & Mission – Simplifying Students Life
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Electrospun Nanofibers Reinforced Aluminium Matrix Composites, A Trial to Imp...IJAMSE Journal
A comparison between TiO2 nanofibers and carbon nanofibers as fibers reinforced metal matrix composites with respect to mechanical properties improvements have been made in this paper. Al and Mg have been chosen as metal matrices. The used carbon and ceramic nanofibers (Titanium Oxide) were successfully synthesized using electrospinning technique. Various weight percentage of calcined
electrospun TiO2 and carbon nanofibers (1, 3, 5 and 10%) were mixed with metal matrix and fabricated by route of powder metallurgy using High Frequency Induction heat Sintering (HFIHS). Mechanical properties of the sintered composites have been investigated. The manufactured pellets were tested for compression test, hardness and microstructures by the field emission scanning electron microscopes (FESEM), which reveals the homogeneous distribution of nanofibers in the Al/Mg matrices. In addition,
energy-dispersive X-ray spectroscopy (EDS) was employed to obtain the chemical analysis of each composite. The result shows that, the ultimate compressive strength increased to 415 MPa at 5% TiO2, which is 13.5% more than the pure Al. The hardness increased up to 64% in case of using the ceramic nanofibers as reinforcement. While using CNFs as reinforcement to the Al matrix deteriorates the
mechanical properties.
Fabrication and Study of the Mechanical Properties of AA2024 Alloy Reinforced...IOSR Journals
Metal matrix nanocomposites (MMNCs) with the addition of nano-sized ceramic particles can be of
significance for automobile, aerospace and numerous other applications. The physical and mechanical
characteristics of the light refractory carbides such as SiC, TiC and B4C make them suitable for being used as
reinforcement in aluminium base metal matrix composites This paper presents a technique for an inexpensive
fabrication of bulk lightweight MMNCs with reproducible microstructures and superior properties by use of
ultrasonic nonlinear effects, namely transient cavitation and acoustic streaming; to achieve uniform dispersion
of nano-sized B4C particles in molten aluminum alloy. Nano-sized B4Cp enhanced properties of aluminium
matrix composites, with 1.5%wt of B4C. As compared to the base metal alloy, the mechanical properties
including tensile strength and yield strength of the nanocomposites were improved significantly, while the
ductility of base metal alloy matrix castings was retained. Micro structural study was carried out with an
optical microscope and SEM which validates a good dispersion of nano-sized B4Cp in metal matrix. Mechanical
properties of the as-cast MMNCs have been improved significantly even with a low weight fraction of nanosized
B4C.
Elastic moduli measurement of solid using ultrasonic techniqueAbu Sufyan Malik
Ultrasonic Testing is used for measuring characteristics of a material i.e. Elastic Modulus, Grain Size Measurement, Material Characterization and Velocity of Waves develop in a Waveguide. We used ‘Echo-Pulse Transducer’ to develop the guided wave in the waveguide of which we used as specimen(Cu). The values obtained experimentally and conventionally are explained in detail and compared in the respective slides.
APGC is a soft ionization technique which produces lower levels of fragmentation compared to traditional EI. Working in dry conditions, APGC typically produces spectra with strong radical cation molecular ions that facilitates the direct comparison of historic, archival EI data from many different sources. The abundant nature of these ions makes it possible to generate specific and sensitive MRM transitions for petroleum biomarkers which provide information on the biological source of the oil, the environment in which the parent organic matter was deposited, and the thermal history of the buried organic matter. Knowledge of these properties is especially useful in upstream applications and is ultimately linked to the economic productivity from a particular geological location.
The universal ionization source offered on all Waters instrumentation facilitates the quick and simple coupling of APGC, UPLC or UPC2 on a single MS platform. Coupled with Xevo TQ-S, APGC enables low-level quantification of petroleum biomarkers that have proved challenging to analyze using GC-MS systems, allowing unambiguous confirmation of the deposition environment from which the oil originates.
FellowBuddy.com is an innovative platform that brings students together to share notes, exam papers, study guides, project reports and presentation for upcoming exams.
We connect Students who have an understanding of course material with Students who need help.
Benefits:-
# Students can catch up on notes they missed because of an absence.
# Underachievers can find peer developed notes that break down lecture and study material in a way that they can understand
# Students can earn better grades, save time and study effectively
Our Vision & Mission – Simplifying Students Life
Our Belief – “The great breakthrough in your life comes when you realize it, that you can learn anything you need to learn; to accomplish any goal that you have set for yourself. This means there are no limits on what you can be, have or do.”
Like Us - https://www.facebook.com/FellowBuddycom
Electrospun Nanofibers Reinforced Aluminium Matrix Composites, A Trial to Imp...IJAMSE Journal
A comparison between TiO2 nanofibers and carbon nanofibers as fibers reinforced metal matrix composites with respect to mechanical properties improvements have been made in this paper. Al and Mg have been chosen as metal matrices. The used carbon and ceramic nanofibers (Titanium Oxide) were successfully synthesized using electrospinning technique. Various weight percentage of calcined
electrospun TiO2 and carbon nanofibers (1, 3, 5 and 10%) were mixed with metal matrix and fabricated by route of powder metallurgy using High Frequency Induction heat Sintering (HFIHS). Mechanical properties of the sintered composites have been investigated. The manufactured pellets were tested for compression test, hardness and microstructures by the field emission scanning electron microscopes (FESEM), which reveals the homogeneous distribution of nanofibers in the Al/Mg matrices. In addition,
energy-dispersive X-ray spectroscopy (EDS) was employed to obtain the chemical analysis of each composite. The result shows that, the ultimate compressive strength increased to 415 MPa at 5% TiO2, which is 13.5% more than the pure Al. The hardness increased up to 64% in case of using the ceramic nanofibers as reinforcement. While using CNFs as reinforcement to the Al matrix deteriorates the
mechanical properties.
Fabrication and Study of the Mechanical Properties of AA2024 Alloy Reinforced...IOSR Journals
Metal matrix nanocomposites (MMNCs) with the addition of nano-sized ceramic particles can be of
significance for automobile, aerospace and numerous other applications. The physical and mechanical
characteristics of the light refractory carbides such as SiC, TiC and B4C make them suitable for being used as
reinforcement in aluminium base metal matrix composites This paper presents a technique for an inexpensive
fabrication of bulk lightweight MMNCs with reproducible microstructures and superior properties by use of
ultrasonic nonlinear effects, namely transient cavitation and acoustic streaming; to achieve uniform dispersion
of nano-sized B4C particles in molten aluminum alloy. Nano-sized B4Cp enhanced properties of aluminium
matrix composites, with 1.5%wt of B4C. As compared to the base metal alloy, the mechanical properties
including tensile strength and yield strength of the nanocomposites were improved significantly, while the
ductility of base metal alloy matrix castings was retained. Micro structural study was carried out with an
optical microscope and SEM which validates a good dispersion of nano-sized B4Cp in metal matrix. Mechanical
properties of the as-cast MMNCs have been improved significantly even with a low weight fraction of nanosized
B4C.
Elastic moduli measurement of solid using ultrasonic techniqueAbu Sufyan Malik
Ultrasonic Testing is used for measuring characteristics of a material i.e. Elastic Modulus, Grain Size Measurement, Material Characterization and Velocity of Waves develop in a Waveguide. We used ‘Echo-Pulse Transducer’ to develop the guided wave in the waveguide of which we used as specimen(Cu). The values obtained experimentally and conventionally are explained in detail and compared in the respective slides.
APGC is a soft ionization technique which produces lower levels of fragmentation compared to traditional EI. Working in dry conditions, APGC typically produces spectra with strong radical cation molecular ions that facilitates the direct comparison of historic, archival EI data from many different sources. The abundant nature of these ions makes it possible to generate specific and sensitive MRM transitions for petroleum biomarkers which provide information on the biological source of the oil, the environment in which the parent organic matter was deposited, and the thermal history of the buried organic matter. Knowledge of these properties is especially useful in upstream applications and is ultimately linked to the economic productivity from a particular geological location.
The universal ionization source offered on all Waters instrumentation facilitates the quick and simple coupling of APGC, UPLC or UPC2 on a single MS platform. Coupled with Xevo TQ-S, APGC enables low-level quantification of petroleum biomarkers that have proved challenging to analyze using GC-MS systems, allowing unambiguous confirmation of the deposition environment from which the oil originates.
La ricostruzione del corridoio ecologico lungo il fiume OlonaIniziativa 21058
La serata di giovedì 28 novembre realizzata a Parabiago grazie alla colaborazione del circolo di Legambiente Parabiago e del Parco dei Mulini è stata una tappa importante per il progetto “L’Olona entra in città: ricostruzione del corridoio ecologico fluviale nel tessuto metropolitano denso” promosso da Comune di Rho e Legambiente e con la partecipazione di un pool di esperti (Università dell’Insubria, Iridra, Oikos e Idrogea) e finanziato da Fondazione Cariplo. Importante perchè, nonostante il progetto preveda lo studio di interventi di deframmentazione nel terriorio di Rho, è fondamentale creare sinergie e collaborazioni con realtà territoriali a Nord e Sud dell'area di intervento. Per questo gli interventi fatti da Raul del Santo, Parco dei Mulini, e da Gianluigi Forloni, assessore di Rho, vanno nella stessa direzione: creare un collegamento fra diverse progettualità e dunque dare possibilità a questo piccolo varco ecologico di ricrearsi.
Damiano Di Simine, presidente regionale di Legambiente, ha riassunto le condizioni territoriali e di contesto molto difficili con cui il gruppo di progetto deve fare i conti. Un’unica immensa città, grande quasi 12 mila ettari: una gigante “Olonia” con una superfice urbanizzata pari quasi alla metà di quella di Milano ma con una popolazione di circa 240 mila abitanti, tutto questo con gravi conseguenze per lo stato di salute del fiume, per la sicurezza idrogeologica e per la sopravvivenza della biodiversità. Barbara Raimondi, Idrogea e Francesco Bisi, Oikos sono entrati invece nel dettaglio delle campagne di indagine faunistiche e vegetazionali portate avanti in seno al progetto evidenziando i singoli nodi critici che per ora frammentano il corridoio. La serata si è conclusa con la consegna della Guida Olona da Vivere, realizzata da Legambiente con il sostegno di Ianomi, ad uso e consumo di tutti gli abitanti del sottobacino Olona-Bozzente e Lura.
(fonte Legambiente)
Microstructural characterization and mechanical property evaluation of microa...IJERA Editor
Experimental evaluation of microstructural and mechanical property of any material is very important for knowingtheir serviceability, various properties and behavior in different operational conditions. These parametric properties can be used to predict their proper utilization, life prediction, service reliability and operational safety in various condition. The material used in this investigation is amicroalloyed steel. The microstructuralcharacterizations have been done through optical microscopy as well as SEM andvarious mechanical property evaluation were done through tensile test, hardness test and Charpy impact toughness tests in different orientations. The results have been used to predict the serviceability, and it is observed from this study that this steel contains good amount of ferrite-pearlitecombination, and this material show the high tensile strength and better mechanical property for utilizing in the field of automotive and piping industry.
Analysis of Al 6061-TiO2 -CNT Metal Matrix Composites Produced by Stir Castin...Dr. Amarjeet Singh
Aluminium Hybrid Composites are the new groupof
metal matrix composites (MMCs) due to their attractive
properties like high ductility, high conductivity, light weight
and high strength to weight ratio and is a response to the
dynamic ever-increasing demand of these super material in
the field of aircrafts and marines. Carbon Nanotube (CNTs)
are also known for their high strength and stiffness and their
low density which when combined together makes CNTs an
ideal reinforcement. This work briefly reviews the research
revelation of an Aluminium (Al-6061) based hybrid metal
matrix composite reinforced with CNTs and TiO2. The
Hybrid Aluminium Metal Matrix Composites (AMMCs) is
prepared with various CNTs weight percentages (0, 0.5, 1 and
1.5 wt. %) and keeping TiO2 weight percentage fixed to
1%.Stir Casting (SC) is focused in general to successfully
fabricate the MMCs. The discussion of this work revolves
around tensile test, hardness test, and Scanning Electron
Microscope (SEM) of the MMC. The mechanical properties
of the fabricated MMCs materials like tensile strength,
hardness and impact strength is found by using these
experimental methods. It has been observed that the tensile
strength of the MMCs increases in the presence of TiO2 and
CNTs and increases even more with the increase in the weight
fraction of CNTs. Same results have been obtained for
hardness and impact strength where there is an increase in
them in the presence of TiO2 and CNT and their value
increases even further with increase in weight fraction of
CNTs.
High Performance Nanocomposites for Mechanical Application: Design, Preparati...Alessio Passalacqua
To effectively design polymer nanocomposites for industrial applications, it is necessary to understand the effects of nanoparticles on final proprieties of the polymers. In this project, systematic studies are carried out on the variability of the structural and mechanical properties as function of the different used nanofiller. Furthermore, the overall mission is to find a correlation between the structural and mechanical changes with the tribological proprieties of thermoplastic nanocomposite due to the inclusion of nanoparticle. This will allow to design nanocomposite materials by selecting ad hoc nanofillers in order to increase their efficiency for mechanical engineering and metal replacement applications.
1. Yuan-Wei (Edward) Chang
3281 S Sepulveda Blvd. Apt. 308, Los Angeles, CA 90034, USA
+1-909-833-5263 yuanweichang@g.ucla.edu
EDUCATION
University of California, Los Angeles, USA May 2015
Ph. D. of Materials Science and Engineering
l Cumulative GPA: 3.85 / 4.0
Coursework: Solid State Physics, Thermodynamics, Metallurgy, Non-Destructive Testing, Kinetics, Composites,
Ceramics, Crystallography, Fracture and Deformation, Nanotechnology, Electron Microscopy, Material Selection,
Energy Harvesting, Surface Analysis, Electron Beam Melting, Additive Manufacture, Failure Analysis
National Chiao Tung University, Taiwan
Bachelor of Materials Science and Engineering
l Cumulative GPA: 3.96 / 4.0
June 2009
EXPERTISE
Materials:
Nanostructured bulk Magnesium alloy and composite, Additive manufactured (3-D printed) Titanium and Nickel alloys,
Iron-Aluminum-Manganese-Carbon alloy with nitride layer
Mechanical Properties Analysis:
Nanoindentation: Micro-compression, Hardness and Elastic modulus measurement, Scratch test, Impression creep
ASTM standard test: Tensile, Compression, Creep, Fatigue, Impact & Fracture, Non-Destructive Test, Corrosion Test
Characteristic Analysis:
Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), Focused Ion Beam (FIB), Optical
Microscope, X-ray Diffraction, Raman Spectroscopy, FTIR, Atomic Force Microscopy(AFM)
Software and Programming:
CAD (AutoCAD/Solidworks), Finite Element Analysis (Abaqus), MATLAB, Molecular Dynamics Simulation (LAMMPS),
Mathematica, Python, R, Website Development, Microsoft Office, Photoshop, ImageJ
WORK & LEADERSHIP EXPERIENCE
Teaching Assistant, UCLA
Ÿ Lead weekly discussion sessions for 40+ students to clarify the materials in the classes
Ÿ Prepare equipment and design experiments for students to materialize what they learned from the lectures
Ÿ Grade homework, midterm and final and organize them for instructors
2011-2015
Research Assistant, Materials Science & Engineering, Prof. Jenn-Ming Yang group, UCLA 2010-Present
Ÿ Execute high strength Mg alloy, additive Manufactured (EBM) Ti alloy projects and published 8 papers within 2 years
Ÿ Develop Mg alloy with the strength comparable to steel but the density is only 1/3
Ÿ Analyze mechanical properties of EBM Ti alloys and use high power laser to improve surface roughness
Reviewer of Journal Paper, Materials Letters, Elsevier January 2014-Present
Ÿ Peer review for journal with high impact factor (2.28) in material science field
Military Police of Taiwan, Ordnance Second Lieutenant August 2009-July 2010
ŸTrained 50 soldiers in the Company of Special Vehicles
ŸOrganized and managed the ordnance for the 800 people size command post
Compal Electronics, Taiwan, Engineering Intern at the Department of Functional Materials
ŸDeveloped high-quality thermal grease and pastes with low cost
ŸSupervised producing processes at factory
2008
2. REASEARCH & PRESENTATION EXPERIENCE
TMS - The Minerals, Metals & Materials Society
ŸOral Speaker, title: The Micro-Mechanical Behavior of Electron Beam Melted Ti-6Al-4V Alloy March 2015
MS&T - Materials Science and Technology Conference & Exhibition
ŸOral Speaker, title: High Thermal Stability of Nanocrystalline Mg-Alloy Reinforced by Diamondoids October 2013
ŸOral Speaker, title: Micro-Compression Test of Nanostructured Magnesium Alloy and Composites October 2012
UCLA Tech Forum
ŸPoster session, title: Effect of Strain Rate and Tapering on the Compressive Strength of a Nanostructured
Magnesium Alloy
ŸPoster session, title: Micro-Mechanical Behavior of 3D Printed Ti Alloy
ŸPoster session, title: High Strength, Ductile and Thermal Stable Nano-structured Mg Micropillars
February 2015
February 2014
May 2013
National Science Council project for college students, Hsinchu, Taiwan
ŸExecuted the project of Semiconductor nanowires functioned as metallic ions sensors
2008-2009
PUBLICATIONS
Thermally Stable Nanostructured Magnesium Nanocomposites Reinforced by Diamantane
Submitted to Scripta Materialia
The Effect of Diamondoids on the Microstructure and Mechanical Behavior of Nanostructured Mg-matrix Nanocomposites
Materials Science & Engineering A, 633, 200-208 (2015)
The Effects of Electron Beam Melting on the Microstructure and Mechanical Properties of Ti-6Al-4V and Gamma-TiAl
Microscopy & Microanalysis Proceeding, (2015)
The Micro-Mechanical Behavior of Electron Beam Melted Ti-6Al-4V Alloy
The Minerals, Metals and Materials Society, (2015)
Size-induced Strengthening in Nanostructured Mg Alloy Micropillars
Materials Research Letter, 2, 199-203 (2014)
Effects of Gas Nitriding Pressure on the Formation of Nanocrystalline AlN in Plasma Nitrided Fe-9Al-28Mn-1.8C Alloy
Surface and Coatings Technology, 254, 313-318 (2014)
Enhanced Compressive Strength of an Extruded Nanostructured Mg–10Al Alloy
Materials Science & Engineering A, 594, 203-211 (2014)
High Thermal Stability of Nanocrystalline Mg-Alloy Reinforced by Diamondoids
Materials Science and Technology, 1528-1534 (2013)
In-situ Microcompression Study of Nanostructured Mg Alloy Micropillars
Materials Letters, 108, 320-323 (2013)
HONOR
First Place of FEI Tony Award
Field Emission INC.
First Place of Scanning Electron Microscope Image Contest
University of California, Los Angeles
Third Place of Scanning Electron Microscope Image Contest
University of California, Los Angeles
Outstanding Teaching Assistant
University of California, Los Angeles
Dean’s List
National Chiao Tung University, Taiwan
2014
2014
2013
Fall 2011
April 2009
