Deformation Behaviour of Al-5%Si Alloy at High Temperatures and Different Strain Rates

• Rao K. P.

  Central Metal Forming Institute

• Doraivelu S. M.

  Universal Energy System Inc. Dayton

• Prasad Y. V. R. K.

  Air Force Materials Lobaratory Dayton

抄録

The constitutive behaviour of Al-5% Si alloy has been studied in the temperature range 500–800 K and in the strain rate range 0.02–200 s⁻¹ in view of obtaining flow stress data and evaluating the mechanism of hot deformation. For this purpose, hot compression tests have been conducted on cylindrical specimens of the alloy. From the transient measurements of force, ram travel and temperature changes during deformation, the values of flow stress, true strain and strain rate have been calculated. The kinetics of deformation has been described using standard kinetic rate equations. An apparent activation energy of 130 kJ/mol and an apparent activation volume in the range 10–200 b³ have been evaluated from the temperature and strain rate dependences of flow stress. It is suggested that at high temperatures and strain rates, the deformation takes place by cross-slip of screw dislocations.

収録刊行物

• Transactions of the Japan Institute of Metals

  Transactions of the Japan Institute of Metals 26 (6), 390-396, 1985

  社団法人 日本金属学会

キーワード

• high temperature deformation
• plastic behaviour
• in situ compression test
• aluminium alloy
• activation energy
• activation volume
• deformation mechanism

詳細情報

• CRID: 1390001205119082368
• NII論文ID: 130003486225
• DOI: 10.2320/matertrans1960.26.390
• COI: 1:CAS:528:DyaL2MXkvFWls74%3D
• ISSN: 24324701
• ISSN: 00214434
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1960/26/6/26_6_390/_pdf
• 本文言語コード: en
• データソース種別:
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  • Crossref
  • CiNii Articles
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