Given the stressstrain curves A B C abd D the microstructura

Given the stress-strain curves, A, B, C abd D, the microstructural schematics W, X, Y andZ, and the word bank, answer the following questions. a) Which curve, A, B, C, or D represents Quenched and Tempered 4140 Steel? What is the UTS? Which microstructure, W, X, Y, or Z represents the structure of Quenched and Tempered 4140 Steel? Using word(s) from the word bank, briefly describe the microstructure. b) Which curve, A, B, C, or D represents Fully Annealed 4140 Steel? What is the UTS? Which microstructure, W, X, Y, or Z represents the structure of Fully Annealed 4140 Steel? Using word(s) from the word bank, briefly describe the microstructure.

Solution

a) Curve C

b)

Ultimate tensile strength (UTS) is the maximum stress that a material can withstand while being stretched or pulled. The ultimate tensile strength of a material is calculated by dividing the cross-section area of the material tested by the stress placed on the material, generally expressed in terms of pounds or tons per square inch of material.

UTS is the final amount of stress sustained in a tensile test at the exact moment the object ruptures.

Tensile strength is an important measure of a material’s ability to perform in an application, and the measurement is widely used when describing the properties of metals and alloys.

Ultimate tensile strength is also known as tensile strength or the ultimate.