Accession Number : ADA183044

Title :   The Influence of Total Strain, Strain Rate and Reheating Time during Warm Rolling on the Superplastic Ductility of an Al-Mg-Zr Alloy.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Wise,James E , II

PDF Url : ADA183044

Report Date : Mar 1987

Pagination or Media Count : 83

Abstract : The effect of varying three processing variables on the superplastic ductility of an Al-10Mg-0.1Zr alloy was studied. The three variables investigated were: (1) time at temperature during warm rolling; (2) strain rate during rolling (by varying reduction per pass); and (3) total strain. After the material was warm rolled, samples were tension tested at 300 C and at strain rates varying from .0000667/S to .167/S. The greatest superplastic ductilities were achieved in material experiencing the largest total strain, lowest strain rate and most prolonged reheating time during warm rolling. The results are consistent with a model for structure development based on continuous recrystallization. Keywords: Superplastic, Ductility, Total strain, Strain rate, Reheat time, Continuous recrystallization.

Descriptors :   *THESES, *DUCTILITY, *STRAIN RATE, *ALUMINUM ALLOYS, RECRYSTALLIZATION, STRAIN RATE, PROCESSING, VARIABLES, TEMPERATURE, TIME, ROLLING(METALLURGY)

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE