Hot compression behavior of GZ31 magnesium alloy

被引：67

作者：

Roostaei, M. ^{[1
]}

Parsa, M. H. ^{[1
,2
]}

Mahmudi, R. ^{[1
,2
]}

Mirzadeh, H. ^{[1
,3
]}

机构：

[1] Univ Tehran, Coll Engn, Sch Met & Mat Engn, Tehran, Iran

[2] Univ Tehran, Ctr Excellence High Performance Mat, Sch Met & Mat Engn, Tehran, Iran

[3] Univ Tehran, Sch Met & Mat Engn, Adv Metalforming & Thermomech Proc Lab, Tehran, Iran

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 631卷

关键词：

Hot working; Rare earth elements; Constitutive equations; Zener-Hollomon parameter; DEFORMATION-BEHAVIOR; DYNAMIC RECRYSTALLIZATION; PROCESSING MAP; MECHANICAL-PROPERTIES; GD; FLOW; MICROSTRUCTURE; HOMOGENIZATION; TEXTURE;

D O I：

10.1016/j.jallcom.2014.11.188

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Hot deformation behavior of Mg-3Gd-1Zn (GZ31) magnesium alloy was studied by hot compression tests over the temperature range of 300-500 degrees C under strain rates of 0.0001-0.1 s(-1). This material exhibited typical broad single-peak dynamic recrystallization behavior followed by a gradual drop towards the steady state stress. The constitutive behavior of the tested alloy was studied by the power, exponential, and hyperbolic sine laws. The stress multiplier and the hyperbolic sine exponent were calculated as 0.024 MPa-1 and 3.42, respectively. The deformation activation energy was found to be about 173.2 kJ/mol, which is higher than the lattice self-diffusion activation energy of magnesium (135 kJ/mol). The latter can be ascribed to the presence of gadolinium, which shows the importance of rare earth elements in increasing the deformation resistance at high temperatures. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：1 / 6

页数：6

共 33 条

[1] Creep properties of Mg-Gd-Y-Zr alloys [J].

Anyanwu, IA ;

Kamado, S ;

Kojima, Y .

MATERIALS TRANSACTIONS, 2001, 42 (07) :1212-1218

[2] Hot working behavior of AZ31 and ME21 magnesium alloys [J].

Gall, S. ;

Huppmann, M. ;

Mayer, H. M. ;

Mueller, S. ;

Reimers, W. .

JOURNAL OF MATERIALS SCIENCE, 2013, 48 (01) :473-480

[3] A modified Johnson-Cook constitutive model for Mg-Gd-Y alloy extended to a wide range of temperatures [J].

Hou, Qing Yu ;

Wang, Jing Tao .

COMPUTATIONAL MATERIALS SCIENCE, 2010, 50 (01) :147-152

[4] Twinning and dynamic precipitation upon hot compression of a Mg-Gd-Y-Nd-Zr alloy [J].

Hou, Xiuli ;

Cao, Zhanyi ;

Sun, Xu ;

Wang, Lidong ;

Wang, Limin .

JOURNAL OF ALLOYS AND COMPOUNDS, 2012, 525 :103-109

[5] Hot shear deformation constitutive analysis of an extruded Mg-6Li-1Zn alloy [J].

Karami, M. ;

Mahmudi, R. .

MATERIALS LETTERS, 2012, 81 :235-238

[6] Formation and mechanical properties of Mg97Zn1RE2 alloys with long-period stacking ordered structure [J].

Kawamura, Yoshihito ;

Yamasaki, Michiaki .

MATERIALS TRANSACTIONS, 2007, 48 (11) :2986-2992

[7]

KHOMAMIZADEH F, 2005, METALLURGICAL MAT A, P3489

[8] Flow behavior and processing map of as-cast Mg-10Gd-4.8Y-2Zn-0.6Zr alloy [J].

Li, H. Z. ;

Wang, H. J. ;

Li, Z. ;

Liu, C. M. ;

Liu, H. T. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 528 (01) :154-160

[9] Hot compression deformation behavior and processing parameters of a cast Mg-Gd-Y-Zr alloy [J].

Li, Li ;

Zhang, Xinming .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (03) :1396-1401

[10] Hot deformation behavior of rare earth magnesium alloy without pre-homogenization treatment [J].

Ma Ming-long ;

Zhang Kui ;

Li Xing-gang ;

Li Yong-jun ;

Zhang Kang .

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2008, 18 :S132-S139

← 1 2 3 4 →