Anomalous strain-rate dependence of ductility in a fully recrystallized 50Mo-50Re alloy at room temperature

Jianhui Xu, Michael Effgen, Tongguang Zhai

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Tensile tests were conducted on a fully recrystallized 50Mo-50Re alloy, in the form of sheet of 0.216 mm thick, at different strain rates ranging from 10-6 s-1 to 1 s-1 at room temperature. It was found that the total elongation of the alloy increased significantly with increasing the strain rate. The fracture surface changed from brittle to ductile with increase in strain rate. Plastic deformation was found to occur by both slip and twinning in this alloy. Electron back scatter diffraction measurements revealed non-uniform plastic strain within individual grains, especially in the vicinity of grain boundary triple junctions. The decrease in ductility at low strain rates in this alloy was possibly related to the interaction between dislocations and trace interstitial elements.

Original languageEnglish
Title of host publicationTMS2008 - 137th Annual Meeting and Exhibition Supplemental Proceedings
Subtitle of host publicationMaterials Processing and Properties
Pages437-442
Number of pages6
StatePublished - 2008
EventTMS 2008 Annual Meeting Supplemental: Materials Processing and Properties - New Orleans, LA, United States
Duration: Mar 9 2008Mar 13 2008

Publication series

NameTMS Annual Meeting
Volume1

Conference

ConferenceTMS 2008 Annual Meeting Supplemental: Materials Processing and Properties
Country/TerritoryUnited States
CityNew Orleans, LA
Period3/9/083/13/08

Keywords

  • Mo-Re alloy
  • Strain-rate effect
  • Tensile properties

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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