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http://dx.doi.org/10.3795/KSME-A.2011.35.10.1145

Relief of Residual Stress and Estimation of Heat-Treatment Characteristics for Al6061 Alloy by Cryogenic Heat Treatment  

Ko, Dae-Hoon (Precision Manufacturing System Division, Pusan Nat'l Univ.)
Park, Ki-Jung (Dept. of Materials Science and Engineering, Pusan Nat'l Univ.)
Cho, Young-Rae (Dept. of Materials Science and Engineering, Pusan Nat'l Univ.)
Lim, Hak-Jin (Defense Product Technical Research Laboratory, Poongsan Corporation)
Lee, Jung-Min (Defense Product Technical Research Laboratory, Poongsan Corporation)
Kim, Min-Byung (Department of Mechanical Engineering, Pusan Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.35, no.10, 2011 , pp. 1145-1153 More about this Journal
Abstract
The purpose of this study is to relieve the residual stress of Al6061 using cryogenic heat treatment. Experimental T6 and cryogenic heat treatments were carried out to define the convective heat-transfer coefficient, which was then applied in the finite-element method (FEM) to predict the residual stress. The predicted residual stress was compared with the residual stress measured by X-ray diffraction (XRD), and the results were in good agreement. The mechanical properties were estimated by measuring the electrical conductivity and hardness. In addition, the size and formation of the precipitations were observed by TEM and XRD analysis for both T6 and cryogenic heat treatments. The effects of the cryogenic heat treatment on the residual stress, mechanical properties, and precipitation of Al6061 alloys were thus confirmed.
Keywords
Residual Stress; Cryogenic Heat Treatment; Uphill Quenching; Finite Element Method; TEM;
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Times Cited By KSCI : 3  (Citation Analysis)
Times Cited By SCOPUS : 1
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