Accession Number:

ADA159062

Title:

Effect of Strain and Strain Rate on the Microstructure of a Superplastically Deformed Al - 10%Mg-0.1%Zr Alloy.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1985-06-01

Pagination or Media Count:

123.0

Abstract:

The deformation characteristics of two thermomechanically processed, high-Magnesium, Aluminum-Magnesium-Zirconium alloys were investigated. The processing included warm rolling at 300 C to 90-95 reduction. Tension testing was done at various temperatures and strain rates and superplastic elongations were observed for both alloys. Subsequently, samples of A1-10Mg-0.1 Zr were tested at 300 C to strains ranging from 8 to 267 as well as to fracture. Strain rates of .00667S and .000667s were used. These were examined via TEM to observe microstructural changes which occur during deformation. Quantitative analysis of the functional relationship between stress, strain, strain rate, and grain size for this alloy is done in an attempt to fit its deformation response to current models for superplastic deformation.

Subject Categories:

  • Properties of Metals and Alloys
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE