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Optimization of hot forming-quenching integrated process parameters for complex aluminum alloy automotive components
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Affiliation:

1.School of Materials Science and Engineering,Wuhan University of Technology;2.Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology

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Fund Project:

the National Natural Science Foundation of China (Grant No. 51405358), the 111 Project (B17034), the National Natural Science Foundation of China (U1564202) and the Innovative Research Team Development Program of Ministry of Education of China (IRT13087)

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    Abstract:

    Hot forming-quenching integrating process of aluminum alloy sheet has been developed to improve formability and overcome thermal distortion by integrating hot stamping and quenching in one operation, which is significantly beneficial for the application of aluminum alloy components in vehicle lightweight industry. In this novel technology, processing parameters are interrelated and interacted. To obtain appropriate forming parameters, thermo-mechanical finite element (FE) model using a unified viscoplastic damage model is set up to predict the formability of a complex-designed 6xxx aluminum alloy B-pillar. A Back Propagation (BP) neural-network combined with multi-objective genetic algorithm (GA) method is adopted to optimize the key process variables including blank temperature, stamping speed and die clearance during hot stamping process. After optimization, the thinning and thickening are reduced to 13.0% and 10.0% by comparing with the initial 56.5% and 14.2%, respectively. In addition, a successful hot stamping B-pillar with satisfactory mechanical performance and excellent forming accuracy is achieved experimentally by using the optimized parameters. It indicates that the finite element model can simulate the hot stamping process accurately and that the optimization method utilized in this paper is feasible and effective.

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[Li Huanhuan, Hu Zhili, Hua Lin, Chen Yizhe. Optimization of hot forming-quenching integrated process parameters for complex aluminum alloy automotive components[J]. Rare Metal Materials and Engineering,2019,48(4):1029~1035.]
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History
  • Received:November 28,2017
  • Revised:March 27,2019
  • Adopted:April 04,2018
  • Online: May 13,2019
  • Published: