Detormation Characteristics in High-strain-rate Superplastic Aluminum Alloys Produced by Powder Metallurgy(〔粉体粉末冶金協会賞〕受賞記念講演)

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概要

• 論文の詳細を見る

• Positive exponent superplasticity (exhibits superplastic behavior at very high strain rates over 1 s<SUP>-1</SUP>) has been observed in nano or near-nano scale aluminum alloys, which have been developed to be 50-500 nm in grain sizes by advanced processing methods. The experimental results on high-strain-rate superplastic materials are reviewed and related to the dependencies of the ability of superplasticity on grain size and the nature of grain boundaries, as well as the state of materials. The optimum superplastic strain rates are found to be strongly dependent on the refinement of grain structures, also the superplastic elongations were critically controlled by the accommodation process to relax the stress concentration resulting from grain boundary sliding, involving an accommodation helper such as soft phases, amorphous phases or liquid phases.

• 社団法人 粉体粉末冶金協会の論文
• 1995-06-15

著者

• Higashi Kenji

  Dept. Mechanical System Engineering College Of Engineering University Of Osaka Prefecture

• Higashi Kenji

  Dept. Of Mech. Sys. Engin. University Of Osaka Prefecture

関連論文

• High Strain Rate Superplasticity of Powder Metallurgy Si_3N_4 Reinforced Al-Zn-Mg Alloy Composites
• Ductility at Dynamic Strain Rate in Mechanically Alloyed Aluminum IN905XL (メカニカルアロイング)
• Detormation Characteristics in High-strain-rate Superplastic Aluminum Alloys Produced by Powder Metallurgy(〔粉体粉末冶金協会賞〕受賞記念講演)

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