Mechanisms of Fracture and Creep of Structural Alloys

Abstract

Progress is reviewed for a research 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 grow, interact and link during ductile fracture due to damage accumulation. Secondly, in a study focused specifically at high strength titanium alloys, we are examining the deformation and fracture behavior of novel beta titanium alloy Ti-23Nb-11Al, which is age-hardenable by the formation of ordered precipates based on Ti3Al. Progress for the period January 1, 1992 to February 28, 1993 is reviewed for the following projects: (1) two- dimensional modeling studies of void linking during ductile, microvoid fracture, (2) a three-dimensional experimental modeling study void growth and linking during ductile fracture, and (3) the influence of temperature on the deformation and oxidation behavior of a new age-hardenable beta titanium alloy.

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Document Details

Document Type
Technical Report
Publication Date
Mar 29, 1993
Accession Number
ADA263108

Entities

People

  • Donald A. Koss

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Age Hardening
  • Alloys
  • Body Weight
  • Computers
  • Elements
  • Finite Element Analysis
  • Geometry
  • Hardening
  • Materials
  • Materials Processing
  • Materials Science
  • Mechanics
  • Oxidation Resistance
  • Three Dimensional
  • Titanium
  • Titanium Alloys
  • Two Dimensional

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Technical Research and Report Writing.