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High strain rate superplasticity of metal matrix composites

  • Tsunemichi Imai*
  • , Shangli Dong
  • , Liang Zhen
  • , Ichinori Shigematsu
  • , Naobumi Saito
  • *Corresponding author for this work
  • National Institute of Advanced Industrial Science and Technology
  • Harbin Institute of Technology

Research output: Contribution to conferencePaperpeer-review

Abstract

High strain rate superplasticity (HSRS) is an efficient near-net shape forming method for metal matrix composites (MMC) applicable to automobile components, semi-conductor packaging, structures in aerospace industry and even for housings in IT industry. The objectives of this study are to investigate the effect of matrix alloy elements on the HSRS in TiN particulate reinforced aluminum composites and to discuss the superplastic deformation mechanism of the HSRS composite. With a matrix of pure aluminum, TiN/1N90 produced an m value of about0.4 and total elongation of 200% at a strain rate of about 10-2s-1V and 928K, which is below the melting temperature of 1N90 pure aluminum. TiN/2014 and TiN/2017 Al composite with volume fraction Vf = 0.15 exhibited an m value of about 0.4 at strain rates higher than 10-1s-1 and maximum tensile elongation of about 200-350% at a strain rate of about 3×10-1s-1 at 818k which was above the solidus temperature of matrix. However, the total elongation of the TiN/2014 is larger than that of the TiN/2017 so the larger amount of Mg in 2014A1 is thought to have an effect on total elongation of TiN/Al composites.

Original languageEnglish
Pages185-191
Number of pages7
StatePublished - 2003
EventHot Deformation od Aluminum Alloys III - San Diego, CA, United States
Duration: 2 Mar 20036 Mar 2003

Conference

ConferenceHot Deformation od Aluminum Alloys III
Country/TerritoryUnited States
CitySan Diego, CA
Period2/03/036/03/03

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