Adiabatic shear localization of AL-SC alloy at extremely high strain rate

Woei-Shyan Lee, Tao Hsing Chen, Ging Ting Lu

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

Abstract

The adiabatic shear behaviour of aluminum-scandium(Al-Sc) alloy under high strain rates ranging from 3.0×105 s-1 to 6.3×l05 s-1 is studied by using a compressive-type split-Hopkinson pressure bar (SHPB). The results show that both the shear stress and the strain rate sensitivity increase with increasing the strain rate. In addition, it is shown that an adiabatic shear band is formed within the deformed specimens for all values of the strain rate. As the strain rate is increased, the width of the shear band decreases, but the microhardness increases. At a strain rate of 3.0×105 s-1, the fracture surface is characterised by multiple transgranular cleavage fractures. However, for strain rates greater than 4.5X×105 s1, the fracture surface has a transgranular dimple-like characteristic, and thus it is inferred that the duetility of the unweldable Al-Sc alloy improves with increasing the strain rate.

Original languageEnglish
Title of host publicationTMS 2010 - 139th Annual Meeting and Exhibition - Supplemental Proceedings
Pages145-150
Number of pages6
Publication statusPublished - 2010 May 21
EventTMS 2010 - 139th Annual Meeting and Exhibition - Seattle, WA, United States
Duration: 2010 Feb 142010 Feb 18

Publication series

NameTMS Annual Meeting
Volume1

Other

OtherTMS 2010 - 139th Annual Meeting and Exhibition
CountryUnited States
CitySeattle, WA
Period10-02-1410-02-18

All Science Journal Classification (ASJC) codes

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

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