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This question is for mechanical engineering. Please help me with this and explain

This question is for mechanical engineering. Please help me with this and explain

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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This question is for mechanical engineering. Please help me with this and explain. Thank you. 

Which of the following statements is incorrect? а. Most engineering materials are polycrystalline. b. The alloy matrix region around a dislocation is strained. During annealing of a work-hardened alloy the three key steps are recovery, quenching and grain growth. С. d. For a material to be precipitation hardened the material solid phase must show a relatively high maximum solubility (several percent) and the solubility of this phase must rapidly decrease with temperature. е. Plastic failure is caused by large-scale dislocation motion.
Transcribed Image Text:Which of the following statements is incorrect? а. Most engineering materials are polycrystalline. b. The alloy matrix region around a dislocation is strained. During annealing of a work-hardened alloy the three key steps are recovery, quenching and grain growth. С. d. For a material to be precipitation hardened the material solid phase must show a relatively high maximum solubility (several percent) and the solubility of this phase must rapidly decrease with temperature. е. Plastic failure is caused by large-scale dislocation motion.
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