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

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

研究成果: Conference contribution

摘要

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.

原文English
主出版物標題TMS 2010 - 139th Annual Meeting and Exhibition - Supplemental Proceedings
頁面145-150
頁數6
出版狀態Published - 2010 五月 21
事件TMS 2010 - 139th Annual Meeting and Exhibition - Seattle, WA, United States
持續時間: 2010 二月 142010 二月 18

出版系列

名字TMS Annual Meeting
1

Other

OtherTMS 2010 - 139th Annual Meeting and Exhibition
國家United States
城市Seattle, WA
期間10-02-1410-02-18

All Science Journal Classification (ASJC) codes

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

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