Bulk metallic glasses (BMGs) are strong, corrosion resistant materials that lack a crystalline microstructure. While BMGs offer advantages like high strength and formability, they are also brittle and expensive to produce. Current applications are limited to niche uses where properties like biocompatibility or magnetism are valuable. However, research continues on utilizing BMGs in composites or developing new alloys to improve ductility and toughness for applications in aerospace, precision tools, and more. Challenges remain in reducing cost and brittleness for widespread structural use.
Advanced Optical Materials was issued as a section of Advanced Materials in 2012 and launched as an individual journal under the same name in 2013. Publishing formats for the section of Advanced Materials were three or four page (short) communications, detailed full papers, and reviews. The stated purpose of this section was to communicate significant discoveries which advance the fields of photonics, plasmonics, and metamaterials. Fundamental research is also covered.....
Advanced Optical Materials was issued as a section of Advanced Materials in 2012 and launched as an individual journal under the same name in 2013. Publishing formats for the section of Advanced Materials were three or four page (short) communications, detailed full papers, and reviews. The stated purpose of this section was to communicate significant discoveries which advance the fields of photonics, plasmonics, and metamaterials. Fundamental research is also covered.....
Replacement of lead Free Cutting Steel - 2018 research paperMukesh Karnik
this project is to study about free cutting steels and machinability property and to focus on newly developed Lead Free- Free Cutting Steel.
Points are given below about project:-
And also explained about Built up edge - Chip Formation to increase the machinability.
effect of alloying elements on free cutting steel.
manufacturing process of free cutting steel.
BASED ON CHROMIUM AND CARBON ADDITION.
To avoid Lead Hazardous problem and environmental friendly.
This presentation is the basic of engineering materials. More presenetation will be added soon. If you like the work, please click on like button and do share. Thanks
Stick welding an ultimate guide for beginnersSophia Lorenn
Welding is a process to join two materials by softening with heat and applying pressure. It can be divided into different categories, including MIG, Arc, Gas, and TIG welding. Talking about stick welding, it is the most popular and common type of welding technique of arc welding.
Microstructure and Hardness observation of HEAT AFFECTED ZONE of low carbon s...Mukesh Karnik
TO study HEAT AFFECTED ZONE of low carbon steel(Mild steel),
Micro-structure observation of heat affected zone of mild steel,
Hardness test done of mild steel at their different zones.
at the result we find out that the HAZ zone grain was more coarser than base metal and HAZ zone.
due to sudden cooling at fusion zone micro structure columnar form which increase the hardness at that zone much more.
I hope You all like it. I hope It is very beneficial for you all. I really thought that you all get enough knowledge from this presentation. This presentation is about materials and their classifications. After you read this presentation you knowledge is not as before.
Most ceramics are made up of two or more elements. ... The two most common chemical bonds for ceramic materials are covalent and ionic. F.) cube root of five The bonding of atoms together is much stronger in covalent and ionic bonding than in metallic.
Basic metallurgy for welding & fabricaton professionalsPuneet Sharma
Eurotech Organizing 2 days "Metallurgy" Course is very beneficial for Welding and Fabrication professionals as it would results in increasing your efficiency. The course objectives are: metals and their properties, to check material test certificate, heat treatment process, Destructive testing, Stainless steel and types, and many more.
It will definitely increase your learning and your work efficiency and boost your career in welding
Please do not hesitate to contact me if you require further information Metallurgy" Course
Best Regards,
Puneet Sharma
Email: (aws.cwi.training@gmail.com)
Mobile no. 08196980555
Replacement of lead Free Cutting Steel - 2018 research paperMukesh Karnik
this project is to study about free cutting steels and machinability property and to focus on newly developed Lead Free- Free Cutting Steel.
Points are given below about project:-
And also explained about Built up edge - Chip Formation to increase the machinability.
effect of alloying elements on free cutting steel.
manufacturing process of free cutting steel.
BASED ON CHROMIUM AND CARBON ADDITION.
To avoid Lead Hazardous problem and environmental friendly.
This presentation is the basic of engineering materials. More presenetation will be added soon. If you like the work, please click on like button and do share. Thanks
Stick welding an ultimate guide for beginnersSophia Lorenn
Welding is a process to join two materials by softening with heat and applying pressure. It can be divided into different categories, including MIG, Arc, Gas, and TIG welding. Talking about stick welding, it is the most popular and common type of welding technique of arc welding.
Microstructure and Hardness observation of HEAT AFFECTED ZONE of low carbon s...Mukesh Karnik
TO study HEAT AFFECTED ZONE of low carbon steel(Mild steel),
Micro-structure observation of heat affected zone of mild steel,
Hardness test done of mild steel at their different zones.
at the result we find out that the HAZ zone grain was more coarser than base metal and HAZ zone.
due to sudden cooling at fusion zone micro structure columnar form which increase the hardness at that zone much more.
I hope You all like it. I hope It is very beneficial for you all. I really thought that you all get enough knowledge from this presentation. This presentation is about materials and their classifications. After you read this presentation you knowledge is not as before.
Most ceramics are made up of two or more elements. ... The two most common chemical bonds for ceramic materials are covalent and ionic. F.) cube root of five The bonding of atoms together is much stronger in covalent and ionic bonding than in metallic.
Basic metallurgy for welding & fabricaton professionalsPuneet Sharma
Eurotech Organizing 2 days "Metallurgy" Course is very beneficial for Welding and Fabrication professionals as it would results in increasing your efficiency. The course objectives are: metals and their properties, to check material test certificate, heat treatment process, Destructive testing, Stainless steel and types, and many more.
It will definitely increase your learning and your work efficiency and boost your career in welding
Please do not hesitate to contact me if you require further information Metallurgy" Course
Best Regards,
Puneet Sharma
Email: (aws.cwi.training@gmail.com)
Mobile no. 08196980555
High performance polymer fibre reinforced metal matrix composites- Metal Orga...Padmanabhan Krishnan
Zylon reinforced aluminium, zinc and lead low melting metal matrix composites that broadly belong to the MOF ( Metal Organic Framework ) materials were processed, characterised and measured for their properties and foreseen applications.
Experimental evaluations and performance of the aluminum silicon carbide par...IAEME Publication
Stresses induced due to thermal mismatch between the metal matrix and the ceramic reinforcement in metal matrix composite may impart plastic deformation to the matrix there by
resulting in a reduction of the residual stresses. Thermal mismatch strains also may quite often crack
the matrix resulting in a relaxation of the residual stresses. The interface in MMCs is a porous, noncrystalline portion in comparison with the matrix or the reinforcement (metal matrix and ceramic reinforcement in this case).
MELD Metal AM: A Repair Technology for Defense, Aerospace, and AutomotiveJ. Louis Schlegel IV
MELD Metal AM Technology is a solid-state process that coats, joins, repairs, and prints unweldable and dissimilar metals fully dense with no porosity. A new metal additive manufacturing technology that is changing the way we repair hardware.
Metal matrix composites (MMCs) possess significantly improved properties including highspecific strength; specific modulus, damping capacity and good wear resistance compared to unreinforced alloys. There has been an increasing interest in composites containing low density and low cost reinforcements. Among various discontinuous dispersoids used, fly ash is one of the most inexpensive and low density reinforcement available in large quantities as solid waste by-product during combustion of coal in thermal power plants. Hence, composites with fly ash as reinforcement are likely to overcome the cost barrier for wide spread applications in automotive and small engine applications.
This project focuses on MgO-C refractories for teeming ladles in steelmaking. It provides an overview of refractory basics, their significance in steel production, and the specific properties of MgO-C refractories. The presentation delves into the manufacturing process, highlighting key steps such as raw material preparation, shaping, and quality control. It explores the critical performance requirements of teeming ladle linings and discusses how MgO-C refractories meet these demands. Case studies demonstrate the benefits of using MgO-C refractories, including extended lifespan, improved operational efficiency, and cost reduction. The project also addresses challenges in teeming ladle lining and emphasises the importance of proper maintenance and sustainability practices. Finally, it outlines future innovations in refractory technology, highlighting opportunities for enhancing performance and sustainability in the steel industry.
2. MATERIALS SCIENCE BACKGROUND
Theoretical strength of a material is significantly
higher than what is observed in reality.
Why?
Dislocations and grain boundaries provide zones for a material to fracture
Theoretical strength is exclusively a property of atomic bonding
3. BACKGROUND
What if engineers could take advantage of the
inherent strength and ductility of metals,
without weakening the material with grain
boundaries and dislocations?
4. WHAT IS A BULK METALLIC GLASS?
BULK:
Material that can be
manufactured to a thickness of
at least one millimeter.
METALLIC:
Composed of at least one
metallic element.
GLASS:
The microstructure of the
material is amorphous,
rather than crystalline.
5. ATTRACTIVE PROPERTIES
High hardness, yield strength
Lack of microstructural features gives good corrosion resistance
Glass Transition Temperatures allows for thermoplastic forming capabilities
Magnetism, Resistivity independent of temperature
Significant Advantages:
BMGs are strong, corrosion resistant materials that are easily formable.
Some alloys have unique magnetic, polish, or biocompatible properties that allow for
use in niche markets.
7. UNATTRACTIVE PROPERTIES
Current high cost of material and processing limits applications.
Severe localization of plastic flow produces zero ductility in tension.
Unstable at high temperatures due to crystallization or low viscosity.
Fracture toughness can be very low.
Significant Disadvantages:
BMGs are expensive and difficult to manufacture.
Brittle failure is a significant concern, especially for large parts.
12. CURRENT APPLICATIONS
Most are niche applications, focusing on biocompatibility, springiness, or
magnetic properties.
Transformers
Electronic Article Surveillance
Sports Equipment
Biomedical Implants
13. TOUGHEST MATERIAL IN THE WORLD
Research suggests that BMGs are capable
of incredible toughness.
Toughest material in the world is a
Palladium based BMG.
14. BMG USE AS A COMPOSITE
Research by Dr. Kevin Laws suggests that BMGs might find the best use as a Metal Matrix Composite
(MMC).
Forgeable Carbon Fiber reinforced MMC (Mg, Cu, Y)
Amorphous structure obtained with Melt Spinning
15. THE FUTURE FOR BULK METALLIC GLASSES
As Pure BMG:
Precision Tooling
Springs and Clubs
Information storage
Fashion Items
As a Metal Matrix Composite (MMC)
Aerospace
Automotive
16. REFERENCES
Ashby, M.F.
Metallic glasses as structural materials
Scripta Materialia, 2005
Demetrious, Marios D.
A damage-tolerant glass
Nature Materials, 2011
Laws, Kevin J.
Supercooled liquid fusion of carbon fibre-bulk metallic glass composites with superplastic forming
properties
Scripta Materialia, 2015
Editor's Notes
Theoretical strength of a material is significantly higher than what is observed in reality.
Dislocations
Grain Boundaries
What if engineers could take advantage of the inherent strength and ductility of metals, without weakening the material with grain boundaries and dislocations?
Bulk: thickness
Metallic: Metals
Glass: Amorphous
High hardness, yield strength
Lack of microstructural features gives good corrosion resistance
Glass Transition Temperatures allows for thermoplastic forming capabilities
Magnetism, Resistivity independent of temperature
Close to theoretical strength, higher than other alloys, ashby plot/paper
Materials, processing is expensive
Unstable at high temperatures
Fracture toughness tends to be low
Biggest issue: brittle-- Severe localization of plastic flow produces zero ductility in tension
Low fracture toughness… but wait… HUGE range
Extremely fast cooling
Vapor Deposition
Solid-state Reactions
Ion Irradiation
Mechanical Allloying
Molten metal, spinning copper wheel, liquid nitrogen cooled. Near infinite cooling rates prohibits crystallization from occurring.
Shear Band: A narrow zone of intense shearing strain that occurs during deformation of ductile materials. New research suggests that this occurs in brittle materials too, just much more rapid (shear band is much more narrow). In fact, depends on the type of atomic bonding, NOT exclusively crystal structure (or lack thereof). Ceramic covalent bonding vs Metallic bonding in metals.
Cal Tech research suggests that a palladium based BMG is capable of shielding crack propagation, thereby producing high toughness. In fact, it is the toughest material in the world.
Dr. Laws from UNSW suggests that BMGs might find best use as an MMC. Forgeable composite, first of its kind. Superplastic forming.
As a pure BMG: precision tooling, sports, information storage, fashion
As MMC: high performance, low weight, high strength scenarios: aerospace and automotive.