Microstructure and mechanical properties of Mg-4.0Zn-0.5Ca alloy

被引：111

作者：

Geng, L. ^{[1
]}

Zhang, B. P. ^{[1
]}

Li, A. B. ^{[1
]}

Dong, C. C. ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

来源：

MATERIALS LETTERS | 2009年 / 63卷 / 05期

关键词：

As-casting; Mechanical properties; Extrusion; Microstructure; HIGH-STRENGTH; ZN; BEHAVIOR; ADDITIONS;

D O I：

10.1016/j.matlet.2008.11.044

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new kind of Mg-4.0 wt.%Zn-0.5 wt.%Ca alloy is fabricated by casting and hot extrusion for used as a high performance structure material as well as a biomaterial. In the as-cast alloy, the average grain size of the alpha-Mg is 120-150 mu m and the precipitated second phases are distributed uniformly in alpha-Mg grains. The as-cast Mg-4.0 wt.%Zn-0.5 wt.%Ca alloy shows a good balance between the tensile strength (211 MPa) and ductility (17% in elongation). After hot extrusion at 593 K, the second phase is greatly refined and the average grain size of the alpha-Mg is reduced to 8-12 mu m which is resulted from dynamic re-crystallization during hot extrusion. In this case, it exhibits a high tensile strength (273 MPa) and a high ductility (34% in elongation) at room temperature. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：557 / 559

页数：3

共 17 条

[1]

Avedesian M.M., 1999, ASM specialty handbook: magnesium and magnesium alloys", P15

[2] The role of Si and Ca on new wrought Mg-Zn-Mn based alloy [J].

Ben-Hamu, G. ;

Eliezer, D. ;

Shin, K. S. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 447 (1-2) :35-43

[3] Enhanced age-hardening behaviour in Mg-4 wt.% Zn micro-alloyed with Ca [J].

Bettles, CJ ;

Gibson, MA ;

Venkatesan, K .

SCRIPTA MATERIALIA, 2004, 51 (03) :193-197

[4] Precipitation-hardened Mg-Ca-Zn alloys with superior creep resistance [J].

Gao, X ;

Zhu, SM ;

Muddle, BC ;

Nie, JF .

SCRIPTA MATERIALIA, 2005, 53 (12) :1321-1326

[5] New deformation mechanisms in fine-grain Mg alloys [J].

Koike, J .

MAGNESIUM ALLOYS 2003, PTS 1 AND 2, 2003, 419-4 :189-194

[6] The activity of non-basal slip systems and dynamic recovery at room temperature in fine-grained AZ31B magnesium alloys [J].

Koike, J ;

Kobayashi, T ;

Mukai, T ;

Watanabe, H ;

Suzuki, M ;

Maruyama, K ;

Higashi, K .

ACTA MATERIALIA, 2003, 51 (07) :2055-2065

[7] A ternary phase observed in rapidly solidified Mg-Ca-Zn alloys [J].

Larionova, TV ;

Park, WW ;

You, BS .

SCRIPTA MATERIALIA, 2001, 45 (01) :7-12

[8] Solidification, solution treatment and age hardening of a Mg-1.6 wt.% Ca-3.2 wt.% Zn alloy [J].

Levi, G ;

Avraham, S ;

Zilberov, A ;

Bamberger, M .

ACTA MATERIALIA, 2006, 54 (02) :523-530

[9] High strength extruded Mg-5Zn-2Nd-1.5Y-0.6Zr-0.4Ca alloy produced by electromagnetic casting [J].

Li, Q ;

Wang, QD ;

Zhou, HT ;

Zeng, XQ ;

Zhang, Y ;

Ding, WJ .

MATERIALS LETTERS, 2005, 59 (19-20) :2549-2554

[10] Enhanced age hardening in a Mg-2.4 at.% Zn alloy by trace additions of Ag and Ca [J].

Mendis, C. L. ;

Oh-ishi, K. ;

Hono, K. .

SCRIPTA MATERIALIA, 2007, 57 (06) :485-488

← 1 2 →