32 Questions
Properly selecting the material or material system is the first critical step in the failure prevention process.
True
Metallographic examination can reveal depth of hardening, grain size, phase present, non metallic inclusions, and porosities.
True
Improper material selection is one of the listed failure causes.
True
Selecting appropriate materials depends on fatigue conditions, stress-rupture time, and temperature range of operation.
True
Casting may create gas porosity and segregation during the processing of materials.
True
Cold working and forging can create cracks, flaws, and distortion during material processing.
True
Welding creates gas porosity and cracks during material processing.
True
Recrystallization does not affect strength, as seen in the welding of cold rolled sheets.
False
The magnitude of stress can be evaluated using metallographic examination.
False
Age-hardened materials maintain their strength at high temperature.
False
Failure analysis is the process of collecting data and analyzing it to determine the __________ cause of a failure.
False
Environmental conditions and operating loads are often the primary causes leading to a material’s failure. True or false?
True
Stress, impact, and frictional loading are examples of operating conditions that frequently cause a material failure. True or false?
True
Failure analysis report is not part of the process of failure analysis. True or false?
False
Failure due to overload can result in distortion, fracture, and crack propagation. True or false?
True
Corrosive environment is an example of a harsh environment that commonly induces failure. True or false?
True
Failure analysis is the process of collecting data and analyzing it to determine the __________ cause of a failure.
False
Age-hardened materials maintain their strength at high temperature. True or false?
True
Cold working and forging can create cracks, flaws, and distortion during material processing. True or false?
True
Failure due to overload can result in distortion, fracture, and crack propagation. True or false?
True
Metallographic examination can reveal depth of hardening, grain size, phase present, non-metallic inclusions, and porosities. True or false?
True
Improper material selection is one of the listed failure causes. True or false?
True
Failure due to overload can result in distortion, fracture, and crack propagation. True or false?
True
Age-hardened materials maintain their strength at high temperature. True or false?
False
Recrystallization does not affect strength, as seen in the welding of cold rolled sheets. True or false?
False
Corrosive environment is an example of a harsh environment that commonly induces failure. True or false?
True
Stress, impact, and frictional loading are examples of operating conditions that frequently cause a material failure. True or false?
True
Improper material selection is one of the listed failure causes. True or false?
True
Metallographic examination can reveal depth of hardening, grain size, phase present, non-metallic inclusions, and porosities. True or false?
True
Selecting appropriate materials depends on fatigue conditions, stress-rupture time, and temperature range of operation. True or false?
True
Failure analysis report is not part of the process of failure analysis. True or false?
False
Properly selecting the material or material system is the first critical step in the failure prevention process. True or false?
True
Study Notes
Material Selection and Failure Prevention
- Properly selecting the material or material system is the first critical step in the failure prevention process.
- Improper material selection is one of the listed failure causes.
- Selecting appropriate materials depends on fatigue conditions, stress-rupture time, and temperature range of operation.
Material Processing and Defects
- Casting may create gas porosity and segregation during material processing.
- Cold working and forging can create cracks, flaws, and distortion during material processing.
- Welding creates gas porosity and cracks during material processing.
Metallographic Examination
- Metallographic examination can reveal depth of hardening, grain size, phase present, non-metallic inclusions, and porosities.
- Metallographic examination can evaluate the magnitude of stress.
Material Properties and Failure
- Age-hardened materials maintain their strength at high temperature.
- Failure due to overload can result in distortion, fracture, and crack propagation.
- Corrosive environment is an example of a harsh environment that commonly induces failure.
- Stress, impact, and frictional loading are examples of operating conditions that frequently cause a material failure.
Failure Analysis
- Failure analysis is the process of collecting data and analyzing it to determine the root cause of a failure.
- Environmental conditions and operating loads are often the primary causes leading to a material’s failure.
- Failure analysis report is a part of the process of failure analysis.
- Recrystallization does not affect strength, as seen in the welding of cold rolled sheets.
Get ready for the Fourth Year- First Term exams in the Mechanical Engineering Department with this quiz on Marks and Hours Distribution. Test your knowledge on the contents of Chapter 1: Failure Analysis- An Overview.
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