Accession Number : ADA182067

Title :   The Effect of Processing and Superplastic Deformation on Ambient Ductility of Al-10%Mg-0.1%Zr.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Solomos,Dimosthenis K

PDF Url : ADA182067

Report Date : Mar 1987

Pagination or Media Count : 87

Abstract : In previous work, the room temperature mechanical properties of an Al-10Mg-0.1Zr alloy were evaluated after simulated, superplastic forming at a temperature of 300 C (573K). A variation of ductility from 1 to 14% elongation was observed in the room temperature test data. To examine the cause of this variability, the processing schedule was changed to one incorporating more severe reductions during rolling. This resulted in a lesser range of variability in room temperature ductility, but the material no longe behaved superplastically. Elongations at 300 C of only 161% at a maximum were recorded although the small grain size required for good superplasticity apparently was developed. SEM and optical microscopy was then done to investigate the cause of this loss of superplastic behavior. Keywords: Superplasticity, Ductility, Aluminum magnesium, Alloys, thermomechanical, Processing, Aluminum alloys.

Descriptors :   *MAGNESIUM, *DUCTILITY, *ALUMINUM ALLOYS, *ZIRCONIUM, *THESES, *PLASTIC DEFORMATION, ALLOYS, ALUMINUM, VARIATIONS, PROCESSING, SCHEDULING, MECHANICAL PROPERTIES, ROOM TEMPERATURE, HIGH RATE, INTENSITY, REDUCTION, ELONGATION, MICROSCOPY, OPTICAL ANALYSIS, TEMPERATURE, TEST METHODS, SIMULATION, FABRICATION, MOLDINGS, LOW DENSITY, MILITARY EQUIPMENT, PHASE STUDIES, MICROSTRUCTURE, POLYCYCLIC COMPOUNDS, RECRYSTALLIZATION, GRAIN SIZE, PLASTIC PROPERTIES

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE