What are some possible defects in drawn sheet-metal parts?In blanking of a circular sheet-metal part, is the clearance applied to the punch diameter or the diediameter?What is martensite?Based on the TTT curve, what is it that should be avoided during martensitic process?What is the main condition for strengthening an alloy by precipitation?

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What are some possible defects in drawn sheet-metal parts? In blanking of a circular sheet-metal part, is the clearance applied to the punch diameter or the die diameter? What is martensite?

Welding: Principles and Applications (MindTap Course List)

8th Edition

ISBN:9781305494695

Author:Larry Jeffus

Publisher:Larry Jeffus

Chapter26: Welding Metallurgy

Section: Chapter Questions

Problem 27R: What are the three steps in precipitation hardening?

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Concept explainers

Forming and Shaping

Metal forming is a category of metalworking process through which the material can be given the desired shape and size by subjecting it to plastic deformation, where the component undergoes bulk deformation process upon application of loads. Unlike the shearing and machining process, the material does not undergo up to a failure point as indicated in the stress-strain curve. Hence, the stresses induced during the forming process are greater than yield strength but less than the failure strength of the material. The process does not lead to the loss of material, so it can be said to be an economical process. During forming, the material is subjected to tensile forces, compressive forces, bending, and shearing loading conditions. The material should possess the property of ductility to undergo the forming process.

Question

What are some possible defects in drawn sheet-metal parts?
In blanking of a circular sheet-metal part, is the clearance applied to the punch diameter or the die
diameter?
What is martensite?
Based on the TTT curve, what is it that should be avoided during martensitic process?
What is the main condition for strengthening an alloy by precipitation?

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