Hot deformation behavior and microstructure evolution of a Mg-Gd-Nd-Y-Zn alloy

被引：15

作者：

Hou, Xiu-Li ^{[1
]}

Li, Yan ^{[1
]}

Lv, Peng ^{[1
]}

Cai, Jie ^{[1
]}

Ji, Le ^{[1
]}

Guan, Qing-Feng ^{[1
]}

机构：

[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Peoples R China

来源：

RARE METALS | 2016年 / 35卷 / 07期

基金：

中国博士后科学基金;

关键词：

Mg-Gd-Nd-Y-Zn alloy; Hot deformation; Microstructure; Dynamic recrystallization; MAGNESIUM ALLOY; TEXTURE; RECRYSTALLIZATION; PRECIPITATION; COMPRESSION; ALUMINUM;

D O I：

10.1007/s12598-015-0507-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hot deformation behavior of homogenized Mg-6.5Gd-1.3Nd-0.7Y-0.3Zn alloy was investigated during compression at temperatures of 250-400 degrees C and at strain rates ranging from 0.001 to 0.100 s(-1). Microstructure analyses show that the flow behaviors are associated with the deformation mechanisms. At the lower temperatures (250-300 degrees C), deformation twinning is triggered due to the difficult activation of dislocation cross-slip. Dynamic recrystallization (DRX) accompanied by dynamic precipitation occurs at the temperature of 350 degrees C and influences the softening behavior of the flow. DRX that develops extensively at original grain boundaries is the main softening mechanism at the high temperature of 400 degrees C and eventually brings a more homogeneous microstructure than that in other deformation conditions. The volume fraction of the DRXed grains increases with temperature increasing and decreases with strain rate increasing.

引用

页码：532 / 536

页数：5

共 17 条

[1] Effect of twinning on the deformation behavior of an extruded Mg-Zn-Zr alloy during hot compression testing [J].

Ai, W. -J. ;

Fang, G. ;

Zhou, J. ;

Leeflang, M. A. ;

Duszczyk, J. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2012, 556 :373-381

[2] Hot working mechanisms and texture development in Mg-3Sn-2Ca-0.4Al alloy [J].

Dharmendra, C. ;

Rao, K. P. ;

Prasad, Y. V. R. K. ;

Hort, N. ;

Kainer, K. U. .

MATERIALS CHEMISTRY AND PHYSICS, 2012, 136 (2-3) :1081-1091

[3] Effect of initial microstructure on ultrafine grain formation through warm deformation in medium-carbon steels [J].

Hase, Kazukuni ;

Tsuji, Nobuhiro .

SCRIPTA MATERIALIA, 2011, 65 (05) :404-407

[4] Precipitation in a Mg-10Gd-3Y-0.4Zr (wt.%) alloy during isothermal ageing at 250°C [J].

He, S. M. ;

Zeng, X. Q. ;

Peng, L. M. ;

Gao, X. ;

Nie, J. F. ;

Ding, W. J. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2006, 421 (1-2) :309-313

[5] Superior light metals by texture engineering: Optimized aluminum and magnesium alloys for automotive applications [J].

Hirsch, J. ;

Al-Samman, T. .

ACTA MATERIALIA, 2013, 61 (03) :818-843

[6] Fabrication of extraordinary high-strength magnesium alloy by hot extrusion [J].

Homma, T. ;

Kunito, N. ;

Kamado, S. .

SCRIPTA MATERIALIA, 2009, 61 (06) :644-647

[7] Structure and mechanical properties of extruded Mg-Gd based alloy sheet [J].

Hou, Xiuli ;

Peng, Qiuming ;

Cao, Zhanyi ;

Xu, Shiwei ;

Kamado, Shigeharu ;

Wang, Lidong ;

Wu, Yaoming ;

Wang, Limin .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2009, 520 (1-2) :162-167

[8]

Humphreys FJ, 2004, RECRYSTALLIZATION RE, V415

[9]

Kainer K.U., 2003, MAGNESIUM ALLOYS TEC

[10] Twinning, dynamic recovery and recrystallization in hot worked Mg-Al-Zn alloy [J].

Myshlyaev, MM ;

McQueen, HJ ;

Mwembela, A ;

Konopleva, E .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 337 (1-2) :121-133

← 1 2 →