Journal
COMPUTATIONAL MATERIALS SCIENCE
Volume 69, Issue -, Pages 396-413Publisher
ELSEVIER
DOI: 10.1016/j.commatsci.2012.11.024
Keywords
Quenching process; A357 aluminum alloy; FEM simulation; Residual stresses; Cold stretching process
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Funding
- School of Materials Science and Engineering, Harbin Institute of Technology
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The quenching process of A357 aluminum alloy cylindrical bars with 80 mm diameter and with heights of 40, 80, 120, 160, 200 and 240 mm were investigated by using finite element method (FEM) simulation. Heat transfer coefficient was accurately calculated by using a traditional method of inverse heat transfer. Residual stresses caused by quenching of A357 alloy cylindrical bars are inevitable. Residual stresses reduction through cold stretching process was studied by using FEM simulation. Three numerical examples were used to illustrate the accuracy and efficiency of our method. The results show that this quenching model is able to predict the residual stress with high precision. The influence of some factors (quenching water temperature, aspect ratio of cylindrical bar, pre-stretching ratio and stretching rate) on the residual stress of quenched cylindrical bars after cold stretching was investigated. (c) 2012 Elsevier B.V. All rights reserved.
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