Mechanisms of Fracture and Creep of Structural Alloys

Abstract

Progress is reviewed for a research program which focuses on two aspects which limit the performance of structural alloys. First, in a study generic to a wide range of materials, we are determining the mechanisms, as well as local failure criteria, by which voids or pores grow and link during ductile fracture due to damage accumulation. Secondly, in a study focused specifically at high temperature titanium alloys, we are examining the elevated temperature strength and deformation behavior of a novel, age-hardenable beta titanium alloy. Progress for the period December 1, 1990 to December 31, 1991 is reviewed for the following projects: (1) modeling the effects of stress state on void linking, (2) three-dimensional void growth and linking during ductile fracture, and (3) elevated temperature behavior of a novel age-hardenable beta titanium alloy.

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Document Details

Document Type
Technical Report
Publication Date
Mar 30, 1992
Accession Number
ADA248701

Entities

People

  • Donald A. Koss

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Body Weight
  • Creep
  • Crystal Structure
  • Hardening
  • Hardness
  • Heat Of Activation
  • Heat Treatment
  • Low Temperature
  • Materials
  • Materials Processing
  • Materials Science
  • Mechanical Properties
  • Mechanics
  • Strain Hardening
  • Three Dimensional
  • Titanium Alloys
  • Two Dimensional

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Systems Analysis and Design
  • Technical Research and Report Writing.