Hot deformation behaviors of AZ91 magnesium alloy: Constitutive equation, ANN-based prediction, processing map and microstructure evolution

doi:10.1016/j.jallcom.2022.164580

	Hot deformation behaviors of AZ91 magnesium alloy: Constitutive equation, ANN-based prediction, processing map and microstructure evolution
	Wang, Dongxiao 2; Zhu, Qiangqiang 2; Wei, Zhenxiong 2; Lin, Baosen 2; Jing, Yi 2; Shi, Yuan 1; Misra, R.D.K.3; Li, Jianping 2
刊名	Journal of Alloys and Compounds
	2022-07-05
卷号	908
关键词	Backpropagation Compression testing Deformation Dynamic recrystallization Hot working Magnesium alloys Strain rate Textures Arrhenius models AZ91 magnesium alloys Back Propagation Back-propagation artificial neural network Dynamic recrystallisation Hot deformation behaviors Microstructure evolutions Processing maps Strain-rates Texture evolutions
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2022.164580
英文摘要	The hot deformation behavior in an AZ91 magnesium alloy was studied using Arrhenius model and Back-Propagation Artificial Neural Network (BP-ANN) approaches. The hot compression tests of AZ91 alloy were performed on the MMS-300 simulator at deformation temperatures and strain rates in the range of 473–623 K and 0.001 s−1- 1 s−1, respectively. The results indicated that the BP-ANN model has higher accuracy than Arrhenius model and the correlation coefficient is as high as 0.99341. The processing map is divided into three parts: machinable area (A), instability area I (INS I) (B) and instability area II (INS II) (C). The instability mode of areas B and C gradually changes from cracks to holes with the increase of temperature or the decrease of strain rate. The stable hot-deformation conditions with peak efficiency of power dissipation were concentrated in the range of 523 K, 0.01 s−1, 573 K, 0.01 s−1, 623 K, 0.001–1 s−1, respectively. With the increase of temperature, the deformation mechanism changed from twinning to dynamic recrystallization (DRX), which is discontinuous dynamic recrystallization (DDRX). Due to DRX, // CD texture intensity increased with the increase of temperature, and then decreased. © 2022 Elsevier B.V.
语种	英语
出版者	Elsevier Ltd
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157954]
专题	体育教学研究部
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.The State Key Laboratory of Rolling and Automation and School of Materials Science and Engineering, Northeastern University, Shenyang; 110819, China; 3.Laboratory for Excellence in Advanced Steel Research, Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso, El Paso; TX; 79668, United States
推荐引用方式 GB/T 7714	Wang, Dongxiao,Zhu, Qiangqiang,Wei, Zhenxiong,et al. Hot deformation behaviors of AZ91 magnesium alloy: Constitutive equation, ANN-based prediction, processing map and microstructure evolution[J]. Journal of Alloys and Compounds,2022,908.
APA	Wang, Dongxiao.,Zhu, Qiangqiang.,Wei, Zhenxiong.,Lin, Baosen.,Jing, Yi.,...&Li, Jianping.(2022).Hot deformation behaviors of AZ91 magnesium alloy: Constitutive equation, ANN-based prediction, processing map and microstructure evolution.Journal of Alloys and Compounds,908.
MLA	Wang, Dongxiao,et al."Hot deformation behaviors of AZ91 magnesium alloy: Constitutive equation, ANN-based prediction, processing map and microstructure evolution".Journal of Alloys and Compounds 908(2022).