Minimization of Residual Stress in an Al-Cu Alloy Forged Plate by Different Heat Treatments

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• 作者：Ya-Bo Dong ; Wen-Zhu Shao ; Jian-Tang Jiang…
• 关键词：Al ; Cu alloy ; residual stress ; slitting method ; thermal ; cold cycling
• 刊名：Journal of Materials Engineering and Performance
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：24
• 期：6
• 页码：2256-2265
• 全文大小：3,485 KB
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• 作者单位：Ya-Bo Dong (1) (2)
  Wen-Zhu Shao (1) (2)
  Jian-Tang Jiang (1) (2)
  Bao-You Zhang (1)
  Liang Zhen (1)
  
  1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
  2. National Key Laboratory of Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin, 150001, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Characterization and Evaluation Materials
  Materials Science
  Tribology, Corrosion and Coatings
  Quality Control, Reliability, Safety and Risk
  Engineering Design
  
• 出版者：Springer New York
• ISSN：1544-1024

文摘

In order to improve the balance of mechanical properties and residual stress, various quenching and aging treatments were applied to Al-Cu alloy forged plate. Residual stresses determined by the x-ray diffraction method and slitting method were compared. The surface residual stress measured by x-ray diffraction method was consistent with that measured by slitting method. The residual stress distribution of samples quenched in water with different temperatures (20, 60, 80, and 100?°C) was measured, and the results showed that the boiling water quenching results in a 91.4% reduction in residual stress magnitudes compared with cold water quenching (20?°C), but the tensile properties of samples quenched in boiling water were unacceptably low. Quenching in 80?°C water results in 75% reduction of residual stress, and the reduction of yield strength is 12.7%. The residual stress and yield strength level are considerable for the dimensional stability of aluminum alloy. Quenching samples into 30% polyalkylene glycol quenchants produced 52.2% reduction in the maximum compressive residual stress, and the reduction in yield strength is 19.7%. Moreover, the effects of uphill quenching and thermal-cold cycling on the residual stress were also investigated. Uphill quenching and thermal-cold cycling produced approximately 25-40% reduction in residual stress, while the effect on tensile properties is quite slight.