Effect of the displacement control routine on the elongation to failure and failure morphologies in superplastic AA-5083

A. L. Lund, S. G. Pitman, M. A. Khaleel, M. T. Smith

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

It has been noted in the literature that superplastically formed Al alloys fail by cavitation. The morphology of the final cavitated fracture region may be important in determining optimum forming conditions, specifically by determining the angle of the fracture relative to the principal stresses. In addition, the displacement control routine may have a large effect on the total elongation that can be expected during forming operations. Tests were performed to evaluate failure in a AA5083-base alloy, by the following methods: 1) uniaxial tension tests at a constant true strain rate were interrupted at 80%, 60%, 40%, and 0% of the maximum load, and microstructurally evaluated to identify the failure path and 2) tests were performed with various displacement control routines, and the elongation to failure was measured. The following displacement routines were used: smooth test, two-step strain test, multi-bump strain rate tests with various sizes of bumps scheduled at various intervals, and variable load oscillation tests.

Original languageEnglish
Title of host publicationTMS Annual Meeting
Place of PublicationWarrendale, PA, United States
PublisherMinerals, Metals & Materials Soc (TMS)
Pages37-48
Number of pages12
Publication statusPublished - 1 Dec 1997
Externally publishedYes
EventProceedings of the 1997 TMS Annual Meeting - Orlando, FL, USA
Duration: 9 Feb 199713 Feb 1997

Other

OtherProceedings of the 1997 TMS Annual Meeting
CityOrlando, FL, USA
Period9/2/9713/2/97

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ASJC Scopus subject areas

  • Geology
  • Metals and Alloys

Cite this

Lund, A. L., Pitman, S. G., Khaleel, M. A., & Smith, M. T. (1997). Effect of the displacement control routine on the elongation to failure and failure morphologies in superplastic AA-5083. In TMS Annual Meeting (pp. 37-48). Minerals, Metals & Materials Soc (TMS).