Xuefeng Tang
University of Science and Technology Beijing
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Featured researches published by Xuefeng Tang.
Transactions of Nonferrous Metals Society of China | 2017
Wen-yu Ma; Baoyu Wang; Jianguo Lin; Xuefeng Tang
Abstract The influences of process parameters on mechanical properties of AA6082 in the hot forming and cold-die quenching (HFQ) process were analysed experimentally. Transmission electron microscopy was used to observe the precipitate distribution and to thus clarify strengthening mechanism. A new model was established to describe the strengthening of AA6082 by HFQ process in this novel forming technique. The material constants in the model were determined using a genetic algorithm tool. This strengthening model for AA6082 can precisely describe the relationship between the strengths of formed workpieces and process parameters. The predicted results agree well with the experimental ones. The Pearson correlation coefficient, average absolute relative error, and root-mean-square error between the calculated and experimental hardness values are 0.99402, 2.0054%, and 2.045, respectively. The model is further developed into an FE code ABAQUS via VUMAT to predict the mechanical property variation of a hot-stamped cup in various ageing conditions.
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF GLOBAL NETWORK FOR INNOVATIVE TECHNOLOGY AND AWAM INTERNATIONAL CONFERENCE IN CIVIL ENGINEERING (IGNITE-AICCE’17): Sustainable Technology And Practice For Infrastructure and Community Resilience | 2017
Xiaobin Fu; Baoyu Wang; Xuefeng Tang
With the development of net-shape forming technology, hot forming process is widely applied to manufacturing gear parts, during which, materials suffer severe plastic distortion and microstructure changes continually. In this paper, to understand and model the flow behavior and microstructure evolution, SAE 8620H, a widely used gear steel, is selected as the object and the flow behavior and microstructure evolution are observed by an isothermal hot compression tests at 1273-1373 K with a strain rate of 0.1-10 s−1. Depending on the results of the compression test, a set of internal-state-variable based unified constitutive equations is put forward to describe the flow behavior and microstructure evaluation of SAE 8620H. Moreover, the evaluation of the dislocation density and the fraction of dynamic recrystallization based on the theory of thermal activation is modeled and reincorporated into the constitutive law. The material parameters in the constitutive model are calculated based on the measured flow st...
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2016
Xuefeng Tang; Baoyu Wang; Yuanming Huo; Wenyu Ma; Jing Zhou; Hongchao Ji; Xiaobin Fu
Materials & Design | 2015
Wenyu Ma; Baoyu Wang; Lei Yang; Xuefeng Tang; Wenchao Xiao; Jing Zhou
The International Journal of Advanced Manufacturing Technology | 2017
Xiaobin Fu; Baoyu Wang; Xiaoxing Zhu; Xuefeng Tang; Hongchao Ji
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2016
Xuefeng Tang; Baoyu Wang; Hongchao Ji; Xiaobin Fu; Wenchao Xiao
Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science | 2015
Wen-yu Ma; Baoyu Wang; Jianhua Bian; Xuefeng Tang; Lei Yang; Yuanming Huo
Journal of Alloys and Compounds | 2017
Hongchao Ji; Jinping Liu; Baoyu Wang; Xuefeng Tang; Jianguo Lin; Yuanming Huo
Applied Thermal Engineering | 2017
Xiaobin Fu; Baoyu Wang; Xuefeng Tang; Hongchao Ji; Xiaoxing Zhu
Journal of Materials Processing Technology | 2017
Yuanming Huo; Jianguo Lin; Qian Bai; Baoyu Wang; Xuefeng Tang; Hongchao Ji