MSE_2610_HW_8

MSE_2610_HW_8 - MSE 2610 Introduction to the Mechanical...

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MSE 2610 Introduction to the Mechanical Properties of Materials Fall 2008 Homework Assignment #8 Due: 13 November 2008 1.) Answer the following about recrystallization: a. What is the driving force for recrystallization? b. What atomistic mechanism is required for recrystallization? What external variables are important to controlling recrystallization? c. What is the driving force for grain growth? d. What is the motivation for doing a recrystallization process? 2.) You perform a series of creep experiments on an aluminum alloy at various temperatures and applied stresses. Your first experiment gives you strain as a function of time at 400ºC and a constant stress of 25 MPa. Time (min) Strain Time (min) Strain 0 0.000 16 0.135 2 0.025 18 0.153 4 0.043 20 0.172 6 0.065 22 0.193 8 0.078 24 0.218 10 0.092 26 0.255 12 0.109 28 0.307 14 0.120 30 0.368 You perform similar experiments to find the steady state strain rate by holding the stress constant at 25MPa and varying the temperature and also by holding the temperature
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This note was uploaded on 12/24/2008 for the course MSE 261 taught by Professor Sass during the Fall '06 term at Cornell.

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MSE_2610_HW_8 - MSE 2610 Introduction to the Mechanical...

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