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Which one of the following does not improve fatigue life of a steel component?
- a)Nitriding
- b)Decarburization
- c)Improve surface finish
- d)Shot-peening
Correct answer is option 'B'. Can you explain this answer?
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Which one of the following does not improve fatigue life of a steel co...
Explanation:
Fatigue life is the ability of a material to resist the propagation of cracks under cyclic loading. The following methods can be used to improve the fatigue life of a steel component.
Nitriding:
Nitriding is a surface hardening process that improves the fatigue life of a steel component. In this process, nitrogen is diffused into the surface of the steel to form a nitride layer. This layer increases the surface hardness and improves the wear and corrosion resistance of the steel component.
Improve surface finish:
A smooth surface finish can improve the fatigue life of a steel component. A smooth surface reduces stress concentrations and provides a uniform stress distribution, which reduces the risk of crack initiation and propagation.
Shot-peening:
Shot-peening is a process of bombarding the surface of a steel component with small spherical particles to induce compressive stresses. This process induces residual compressive stresses in the surface, which improves the fatigue life of the component by resisting crack initiation and propagation.
Decarburization:
Decarburization is a process of removing carbon from the surface layer of a steel component. This process reduces the surface hardness and can result in a reduction of the fatigue life of the component.
Therefore, the correct answer is option B, decarburization, which reduces the surface hardness and can result in a reduction in fatigue life.
Fatigue life is the ability of a material to resist the propagation of cracks under cyclic loading. The following methods can be used to improve the fatigue life of a steel component.
Nitriding:
Nitriding is a surface hardening process that improves the fatigue life of a steel component. In this process, nitrogen is diffused into the surface of the steel to form a nitride layer. This layer increases the surface hardness and improves the wear and corrosion resistance of the steel component.
Improve surface finish:
A smooth surface finish can improve the fatigue life of a steel component. A smooth surface reduces stress concentrations and provides a uniform stress distribution, which reduces the risk of crack initiation and propagation.
Shot-peening:
Shot-peening is a process of bombarding the surface of a steel component with small spherical particles to induce compressive stresses. This process induces residual compressive stresses in the surface, which improves the fatigue life of the component by resisting crack initiation and propagation.
Decarburization:
Decarburization is a process of removing carbon from the surface layer of a steel component. This process reduces the surface hardness and can result in a reduction of the fatigue life of the component.
Therefore, the correct answer is option B, decarburization, which reduces the surface hardness and can result in a reduction in fatigue life.
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Which one of the following does not improve fatigue life of a steel component?a)Nitridingb)Decarburizationc)Improve surface finishd)Shot-peeningCorrect answer is option 'B'. Can you explain this answer?
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