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Evolution of mechanical properties of ultrafine grained 1050 alloy annealing with electric current
Cao, Yiheng; He, Lizi; Zhang, Lin; Zhou, Yizhou; Wang, Ping; Cui, Jianzhong; helizi@epm.neu.edu.cn
2016
Source PublicationMATERIALS CHARACTERIZATION
ISSN1044-5803
Volume113Pages:160-167
AbstractThe tensile properties and microstructures of 1050 aluminum alloy prepared by equal channel angular pressing at cryogenic temperature (cryoECAP) after electric current annealing at 90-210 degrees C for 3 h were investigated by tensile test, electron back scattering diffraction (EBSD) and transmission electron microscopy (TEM). An unexpected annealing-induced strengthening phenomenon occurs at 90-210 degrees C, due to a significant decrease in the density of mobile dislocations after annealing, and thus a higher yield stress is required to nucleate alternative dislocation sources during tensile test. The electric current can enhance the motion of dislocations, lead to a lower dislocation density at 90-150 degrees C, and thus shift the peak annealing temperature from 150 degrees C to 120 degrees C Moreover, the electric current can promote the migration of grain boundaries at 150-210 degrees C, result in a larger grain size at 150 degrees C and 210 degrees C, and thus causes a lower yield stress. The sample annealed with electric current has a lower uniform elongation at 90-120 degrees C, and the deviation in the uniform elongation between samples annealed without and with electric current becomes smaller at 150-210 degrees C. (C) 2016 Elsevier Inc. All rights reserved.
description.department[cao, yiheng ; he, lizi ; wang, ping ; cui, jianzhong] northeastern univ, key lab electromagnet proc mat, minist educ, shenyang 110819, peoples r china ; [zhang, lin] northeastern univ, inst mat sci & engn, shenyang 110819, peoples r china ; [zhou, yizhou] chinese acad sci, inst met res, shenyang 110016, peoples r china
KeywordElectric Current Annealing Annealing-induced Strengthening Uniform Elongation Cryoecap 1050 Alloy
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74836
Collection中国科学院金属研究所
Corresponding Authorhelizi@epm.neu.edu.cn
Recommended Citation
GB/T 7714
Cao, Yiheng,He, Lizi,Zhang, Lin,et al. Evolution of mechanical properties of ultrafine grained 1050 alloy annealing with electric current[J]. MATERIALS CHARACTERIZATION,2016,113:160-167.
APA Cao, Yiheng.,He, Lizi.,Zhang, Lin.,Zhou, Yizhou.,Wang, Ping.,...&helizi@epm.neu.edu.cn.(2016).Evolution of mechanical properties of ultrafine grained 1050 alloy annealing with electric current.MATERIALS CHARACTERIZATION,113,160-167.
MLA Cao, Yiheng,et al."Evolution of mechanical properties of ultrafine grained 1050 alloy annealing with electric current".MATERIALS CHARACTERIZATION 113(2016):160-167.
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