Accession Number : ADA184902

Title :   Investigation by Differential Scanning Calorimetry of Microstructure in a Superplastic Al-Mg-Zr Alloy.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Stewart, Donald L , II

PDF Url : ADA184902

Report Date : Jun 1987

Pagination or Media Count : 90

Abstract : The three significant variables identified in thermomechanical processing of an A1-10Mg-0.1Zr alloy to obtain superplastic ductilities are reduction per pass, reheating time between passes, and total strain during warm rolling at 573K. The effect of adjusting these variables on elevated temperature mechanical properties has been evaluated and the microstructures characterized using transmission electron microscopy. Comparison of the differential scanning calorimetry results with mechanical property and microstructural data reveal that the endothermic energy absorbed by the material, which is related to microstructural stability, can be correlated with superplastic behavior.

Descriptors :   *ALUMINUM ALLOYS, CALORIMETRY, DIFFERENTIAL THERMAL ANALYSIS, ELONGATION, ENDOTHERMIC REACTIONS, DUCTILITY, MICROSTRUCTURE, ROLLING(METALLURGY), STRESS STRAIN RELATIONS, MAGNESIUM, ZIRCONIUM, AGING(MATERIALS), QUENCHING, RECRYSTALLIZATION, CORROSION RESISTANCE, TENSILE PROPERTIES, GRAIN SIZE, PHASE TRANSFORMATIONS, MICROSCOPY, THESES

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE