CREEP RUPTURE OF DUCTILE MATERIALS SUBJECTED TO STRAIN HARDENING OR TIME HARDENING CREEP

Abstract

An analysis of creep rupture of ductile materials subjected to strain hardening creep is presented. The analysis is similar to an earlier one by Hoff, but is based on a different generalization of the primary creep rate relation. Both approaches are then extended to time hardening creep. Simple approximate formulae for critical times are presented and the results of both approaches for the two types of creep are compared. Correlation with experimental data for some aluminum-copper, aluminum-magnesium and aluminum-zinc alloys shows fairly good agreement of rupture times for these very ductile materials. However, attempted correlation with data for other materials which do not exhibit such prominent ductility indicates that the basic assumption of the analysis, that creep rupture is caused primarily by a process of reduction of area, holds only for very ductile materials.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1964
Accession Number
AD0444808

Entities

People

  • Josef Singer

Organizations

  • Stanford University

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Aeronautical Engineering
  • Alloys
  • Aluminum
  • Aluminum Alloys
  • Applied Mechanics
  • Engineering
  • Experimental Data
  • Hardening
  • High Temperature
  • Materials
  • Mechanics
  • Metals
  • New York
  • Solid Solutions
  • Strain Hardening
  • Strain Rate
  • United States

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.
  • Theoretical Analysis.