Introduction to Non Destructive Testing. Various Advantages, and also covers the 6 principal methods of Non Destructive Testing and their applications and limitations.
Introduction to Non Destructive Testing. Various Advantages, and also covers the 6 principal methods of Non Destructive Testing and their applications and limitations.
This presentation Based on Non Destructive Testing.the Abbreviation is NDT.Dye penetrant Testing (DPT) is the part of NDT .I think my presentation will be helpful for NDT Related person
A Journey In The Land of Data - رحلة في عالم البياناتMazen Melibari
محاضرة قدمها د. مازن عبدالله مليباري في يوم البيانات المفتوحة 2017، الذي تم تنظيمه من قبل "تقنية" في جدة، المملكة العربية السعودية.
Presented By Dr. Mazen A. Melibari at Open Data Day, 2017, Jeddah, Saudi Arabia. Hosted By Techniya.com
This presentation Based on Non Destructive Testing.the Abbreviation is NDT.Dye penetrant Testing (DPT) is the part of NDT .I think my presentation will be helpful for NDT Related person
A Journey In The Land of Data - رحلة في عالم البياناتMazen Melibari
محاضرة قدمها د. مازن عبدالله مليباري في يوم البيانات المفتوحة 2017، الذي تم تنظيمه من قبل "تقنية" في جدة، المملكة العربية السعودية.
Presented By Dr. Mazen A. Melibari at Open Data Day, 2017, Jeddah, Saudi Arabia. Hosted By Techniya.com
Industrial Fluid power ppt for Ifp ch. no. 5 pneumatic circuits, By Prof. Kokare A.Y.
Lecturer at Babasaheb phadtare polytechnic, Kalamb-Walchandnagar.
problems of junk foods are very severe nowadays and many still dont know the seriousness of it.. a general awareness creating ppt on dangers of junk foods
+1 Chemistry Notes - Akshansh,
Mole Concept,
Redox Reaction,
Atomic Structure,
Periodic Table and Periodicity,
Chemical Bonding,
States of Matter,
Organic Chemistry,
Isomerism,
Hydrocarbons,
Energetics,
Chemical Equilibrium,
Hydrogen,
s Block,
p block,
Ionic Equilibrium,
Extraction of metals,
Group 13,
Qualitative Inorganic Analysis,
Reaction Mechanism,
Reactive Intermediates
Find more study guides on:
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Non destructing testing | nondestructive testingSigma Test
Nondestructive Testing (NDT) is a wide-ranging gathering of test and inspection processes used to distinguish surface and sub-surface deformities or irregularities in sample tests, without influencing the future working presentation of the assessed parts.
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Ndt first year Physics for diploma student by Prof. Kokare A.Y.
1. Subject:- Applied Physics(PHY)
CHAPTER NO: 02
Non-Destructive Testing of Materials
(10 Marks)
BY
Prof. Kokare A.Y.
BABASAHEB PHADTARE POLYTECHNICKALAMB-WALCHANDNAGAR.
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
2. Ultrasonic Waves
“The sound waves having frequency more than 20 kHz are called as
ultrasonic waves”.
Range for Infrasonic, Sonic and Ultrasonic Frequency
1) Infrasonic waves : Less than 20 Hz.
2) Sonic Waves : Between 20 Hz to 20 kHz.
3) Ultrasonic waves : More than 20 kHz.
State the Properties Of Ultrasonic Waves
1) Frequency of ultrasonic waves is more than 20 kHz.
2) Ultrasonic waves has shorter wavelength.
3) Ultrasonic waves travel long distance without considerable loss.
4) Due to passing Ultrasonic waves, temperature of fluid increases.
5) Ultrasonic waves travel with constant speed through homogenous
medium.
6) Ultrasonic waves show less diffraction.
7) Ultrasonic waves carry high amount of sound energy.B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
4. Necessity of Testing :-
Testing of materials is necessary :
1) To detect defects in material.
2) To determine physical, chemical, mechanical properties of
material.
3) To determine breaking stress, hardness, strength of
material.
4) To check suitability of material.
Destructive Testing :-
“The method of testing of material with destruction of material
is called as destructive testing”.
In this method, material cannot use after testing and 100%
testing is not possible.B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
5. Non Destructive Testing :-
“The method of testing of material without destruction of
material is called as non destructive testing”.
In this method, material can used after testing and 100%
testing is possible.
Advantages of NDT :-
1) Material can used after testing.
2) 100% testing is possible.
3) Used as quality control tool.
4) Used as quality assurance tool.
5) Testing is possible before manufacturing.
6) Testing is possible after manufacturing.
7) Testing is possible while manufacturing.
8) Testing is possible while servicing.
B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
6. Limitations of NDT
1) Required minimum two testing methods for complete
examination of material.
2) Required trained/Expert persons for conduction of testing.
3) Equipment cost is high.
4) Quantitative testing is difficult.
Selection Criteria for NDT Method
1) Codes and standard requirements.
2) Nature of material.
3) Nature of defects.
4) Manufacturing process of material.
5) Equipment's available for testing.
6) Required cost.
B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
7. Different NDT methods used in Industry
1)Liquid penetrant testing (LPT).
2) Ultrasonic testing (UT).
3) Magnetic particle testing (MT).
4) Radiographic testing (RT).
5) Eddy current testing (ET).
6) Visual testing (VT).
7) Holographic testing (HT).B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
9. 2) Application of Dye Penetrant
After cleaning of surface of material a suitable dye penetrant
is applied on surface of material. The dye penetrant slips
(enter) into cracks of material. Time required to slips into the
cracks is called dwell time. It is near about 20-30 minutes.
3) Removal of Excess Penetrant
After dwell time excess dye penetrant is removed from
surface of material.
B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
10. 4) Application of Developer
A thin layer of developer is applied on surface of material. Due to
reverse capillarity dye penetrant is comes out on surface i.e. developer
pulls penetrant on surface.
5) Inspection And Evaluation
The inspection of material is done under white light or UV light
depending on penetrant used. White light is used when visible dye
penetrant used and UV light is used when fluorescent light used.
6) Post Cleaning
Using cleaning reagent material is cleaned and can be used for intended
purpose.
B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
Dye Penetrant Inspection.mp4
11. Advantages of LPT
1) It can be used for all metals and non metals.
2) It can be used for any size and shape of material.
3) It requires less cost.
4) High sensitivity (small discontinuities can be
detected).
Limitations of LPT
1) It is used only for surface defects.
2) It is not suitable for porous material.
3) Requires expert person.
4) Surface finish and roughness can affect
inspection sensitivity.
5) Pre-cleaning is critical since impurities can cover
defects.B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
12. Applications Of LPT
1) LPT is used to detect surface open cracks
in welds (e.g. pipes, turbine, etc.).
2) It is used to detect surface open cracks in
forgings (e.g. crank shaft).
3) It is used to detect surface open cracks in
castings (e.g. piston head).
4) It is used to detect surface open cracks in
rolled products (e.g. rolling stocks).
B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
13. Characteristics of Penetrant
Selection of penetrant is depends on
following characteristics :
1) Penetrant should possess low surface
tension.
2) Penetrant should possess low viscosity.
3) It should wet material.
4) It should easily available.
5) It should easily removable.
6) It should have high sensitivity to light.
7) It should be good solvent.
B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
14. Characteristics of Developer
Selection of developer is depends on
following characteristics :
1) Developer should possess high absorption
ability.
2) Developer should possess low viscosity.
3) It should wet material.
4) It should easily available.
5) It should easily removable.
6) It should have high sensitivity to light.
7) It should be good solvent.B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
15. Ultrasonic Testing (UT)
There are various UT methods used in industries.
1) Through transmission UT method
2) Pulse Echo UT method
3) Resonance method
Principle
The principle of UT method is “When ultrasonic
waves are incident on a material, it gets reflected
from crack”.
B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
16. 1) Through transmission UT method
B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
Through transmission- Ultrasonic Testig Through transmission.mp4
17. 2) Pulse Echo UT method
B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
Ultrasonic Pulse Velocity-Echo Testing of Concrete, Rock, Wood and Ceramics with Pundit PL-200-PE.mp4
Ultrasonic Testing.mp4
18. Advantages of UT
1) It detects internal as well as open cracks.
2) It has high sensitivity.
3) It has high reliability.
4) It can be used for all types of materials (metals,
alloys, wood, etc.)
5) Atomization is possible.
6) Equipment is portable and easy to handle.
7) This method is harmless.
8) It is highly accurate.
9) Less preparation is required.
10) It can be used to measure thickness of material.
B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
19. Limitations of UT
1) It requires expert person for operating the
device.
2) It requires coolant for effective transfer of
ultrasound.
3) Calibration is required before testing.
4) Material of irregular surface is difficult to
inspect.
5) The materials of low sound transmission
are difficult to inspect.
B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.
20. Applications of UT
1) UT is used to detect flaws (cracks) in all metals,
rubber, tyres, concrete, wood, plastic.
2) Rail inspection : UT is used for inspection of rails.
3) Air craft inspection : UT is used to detect cracks
in body of air craft.
4) Tunnel inspection : The cracks in wall of tunnel
can be detect using UT method.
5) Bridge inspection : The cracks in the pillars and
slab of bridge are detect using UT method.
6) It is used to detect subsurface flaws in forging
components.
7) It is used to test plant components and systems.
B.P.P. Kalamb-Walchandnagar Prof. Kokare
A.Y.