Title page for ETD etd-0512104-140359

Document Type	thesis
Author Name	Mitchell, Ian D
URN	etd-0512104-140359
Title	Residual Stress Reduction During Quenching of Wrought 7075 Aluminum Alloy
Degree	MS
Department	Materials Science & Engineering
Advisors	Richard D. Sisson, Jr., Advisor Yiming Rong, Committee Member Md. Maniruzzaman, Committee Member
Keywords	Quench Factor Analysis Aluminum 7075 Deformation Residual stress Quenching
Date of Presentation/Defense	2004-05-06
Availability	unrestricted
Abstract The finite difference method was used to calculate the variable heat transfer coefficient required to maximize mechanical properties of heat treated wrought 7075 aluminum alloy without causing residual stress. Quench simulation enabled determination of maximum surface heat flux bordering on inducing plastic flow in the work piece. Quench Factor Analysis was used to correlate cylinder diameter to yield strength in the T73 condition. It was found that the maximum bar diameter capable of being quenched without residual stress while meeting military mechanical design minimums is 2”. It was also found that the cooling rate must increase exponentially and that the maximum cooling rate needed to achieve minimum mechanical properties is well within the capability of metals heat treatment industry.
Files	Mitchell.pdf

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