基于Deform软件二次开发和BP神经网络的TA15多向锻造微观组织预报

doi:10.7527/S1000-6893.2020.24693

Abstract

Abstract: The true stress-strain curve of hot deformation of TA15 alloy was constructed through the hot compression test. The constitutive equations for hot deformation in the temperature range of the dual-phase region and single-phase region of the alloy were then established. A dynamic recrystallization model of TA15 alloy was established based on the statistical data of dynamic recrystallization of hot compressed samples. With the help of the secondary development function provided by Deform, programming of related mathematical models was realized, the experimental plan was formulated by the orthogonal method, and then simulation of the microstructure evolution of the multi-directional forging deformation of the dual-phase region and single-phase region of TA15 alloy was realized. Through analysis of the orthogonal experiment results, the objects under the influence of various factors and the influence degree of the factors were obtained, and the optimal combination of factors for multi-directional forging in the temperature range of the dual-phase region and the single-phase region was proposed. A Back Propagation (BP) neural network prediction model for the multi-directional forging deformation microstructure of TA15 alloy was established. The prediction results were compared with the finite element simulation results. The comparison results show that the prediction results of the two methods are basically the same, but the neural network based method can predict details, which is difficult to be achieved by finite element simulation, and thus can achieve more detailed division of microstructure distribution.

Key words: TA15 alloy, constitutive equations, multi-directional forging, microstructure prediction, secondary development of Deform, BP neural network

CLC Number:

LUO Junting, ZHAO Jingqi, YANG Zheyi, LIU Weipeng, ZHANG Chunxiang. Microstructure prediction of multi-directional forging of TA15 alloy based on secondary development of Deform and BP neural network[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021, 42(12): 424693-424693.

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Microstructure prediction of multi-directional forging of TA15 alloy based on secondary development of Deform and BP neural network

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