High-Strain-Rate Superplasticity in an AZ91 Magnesium Alloy Processed by Ingot Metallurgy Route

• Watanabe Hiroyuki

  Osaka Municipal Technical Research Institute

• Mukai Toshiji

  Osaka Municipal Technical Research Institute

• Ishikawa Koichi

  Osaka Municipal Technical Research Institute

• Higashi Kenji

  Department of Metallurgy and Materials Science, Osaka Prefecture University

Abstract

High-strain-rate superplastic magnesium alloy, AZ91, was processed through the ingot metallurgy route. The relationship between working temperature and resulting grain size indicated that the grain size tends to decrease with decreasing working temperature in AZ91. Based on this preliminary result, the ingot was hot extruded at a relatively low temperature of 523 K with a reduction ratio of 44. A very fine grain size of 1.7 \\micron was attained only by hot extrusion. The fine-grained structure was stable blow 573 K. Owing to the fine grain size, high-strain-rate superplasticity was observed at temperatures of ∼548 K.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 43 (1), 78-80, 2002

  The Japan Institute of Metals and Materials

Keywords

• magnesium alloy
• grain refinement
• hot extrusion
• high-strain-rate superplasticity

Details

• CRID: 1390282679222816640
• NII Article ID: 130004451652
• NII Article ID: 10012320512
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.43.78
• COI: 1:CAS:528:DC%2BD38XitlSrtbo%3D
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 6051394
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6051394
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/43/1/43_1_78/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed