High-temperature superplastic behavior and ECAP deformation mechanism of two-phase Mg-Li alloy

被引：29
作者：
Chen, Dexin [1 ]
Kong, Jing [2 ]
Gui, Zhenzhen [3 ]
Li, Wei [1 ]
Long, Yan [4 ]
Kang, Zhixin [4 ]
机构：
[1] Jinan Univ, Shaoguan Res Inst, Inst Adv Wear & Corros Resistant & Funct Mat, 601 Huangpu Ave West, Guangzhou 510632, Peoples R China
[2] Chinese Acad Sci, Zhuhai Inst Adv Technol, Hagongda Rd, Zhuhai 519080, Peoples R China
[3] Guangzhou Univ, Sch Mech & Elect Engn, 230 Wai Huan Xi Rd, Guangzhou 510006, Peoples R China
[4] South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Metall M, Sch Mech & Automot Engn, 381 Wushan, Guangzhou 510640, Peoples R China
来源：
MATERIALS LETTERS | 2021年 / 301卷
关键词：
Metals and alloys; Microstructure; Superplasticity; Deformation mechanism;
D O I：
10.1016/j.matlet.2021.130358
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Fine grains of Two-phase Mg-Li alloy could be achieved by severe plastic deformation. The alloy exhibited a superplastic behavior with a maximum elongation of 306.6% at 623 K with an initial rate of 1.5 x 10-2 s- 1. The value of the strain rate sensitivity under 623 K and 1.5 x 10-2s-1 is 0.36, and 121.6-160.0 kJ/mol. The dominant deformation mechanism in this alloy is grain boundary sliding accommodated by a slip which was controlled by lattice diffusion at 523-623 K.
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页数：4
相关论文
共 11 条
[1]   A MODEL FOR THE RATE-CONTROLLING MECHANISM IN SUPERPLASTICITY [J].
ARIELI, A ;
MUKHERJEE, AK .
MATERIALS SCIENCE AND ENGINEERING, 1980, 45 (01) :61-70
[2]   The development of β phase Mg-Li alloys for ultralight corrosion resistant applications [J].
Cain, Taylor W. ;
Labukas, Joseph P. .
NPJ MATERIALS DEGRADATION, 2020, 4 (01)
[3]   Using ab initio calculations in designing bcc Mg-Li alloys for ultra-lightweight applications [J].
Counts, W. A. ;
Friak, M. ;
Raabe, D. ;
Neugebauer, J. .
ACTA MATERIALIA, 2009, 57 (01) :69-76
[4]   Effects of alloying elements on the microstructure and corrosion behavior of Mg-Li-Al-Y alloys [J].
He, Yuqing ;
Peng, Chaoqun ;
Feng, Yan ;
Wang, Richu ;
Zhong, Jianfeng .
JOURNAL OF ALLOYS AND COMPOUNDS, 2020, 834
[5]   Principle of equal-channel angular pressing for the processing of ultra-fine grained materials [J].
Iwahashi, Y ;
Wang, JT ;
Horita, Z ;
Nemoto, M ;
Langdon, TG .
SCRIPTA MATERIALIA, 1996, 35 (02) :143-146
[6]   Superplasticity in a two-phase Mg-8Li-2Zn alloy processed by two-pass extrusion [J].
Liu, Xuhe ;
Zhan, Haibo ;
Gu, Shihai ;
Qu, Zhikun ;
Wu, Ruizhi ;
Zhang, Milin .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (19-20) :6157-6162
[7]   Superplasticity in a multi-directionally forged Mg-Li-Zn alloy [J].
Mehrabi, A. ;
Mahmudi, R. ;
Miura, H. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2019, 765
[8]   EBSD study of superplastically strained Al-Mg-Li alloy [J].
Myshlyaev, M. ;
Mironov, S. ;
Korznikova, G. ;
Konkova, T. ;
Korznikova, E. ;
Aletdinov, A. ;
Khalikova, G. .
MATERIALS LETTERS, 2020, 275
[9]   The superplastic property of the as-extruded Mg-8Li alloy [J].
Qu, Zhikun ;
Liu, Xuhe ;
Wu, Ruizhi ;
Zhang, Milin .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (13-14) :3284-3287
[10]   Precipitation strengthening in an ultralight magnesium alloy [J].
Tang, Song ;
Xin, Tongzheng ;
Xu, Wanqiang ;
Miskovic, David ;
Sha, Gang ;
Quadir, Zakaria ;
Ringer, Simon ;
Nomoto, Keita ;
Birbilis, Nick ;
Ferry, Michael .
NATURE COMMUNICATIONS, 2019, 10 (1)
12