SUPERPLASTIC BEHAVIOR OF A FINE-GRAINED 2-PHASE MG-9WT-PERCENT LI ALLOY

被引：120

作者：

METENIER, P ^{[1
]}

GONZALEZDONCEL, G ^{[1
]}

RUANO, OA ^{[1
]}

WOLFENSTINE, J ^{[1
]}

SHERBY, OD ^{[1
]}

机构：

[1] STANFORD UNIV,DEPT MAT SCI & ENGN,STANFORD,CA 94305

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1990年 / 125卷 / 02期

关键词：

D O I：

10.1016/0921-5093(90)90169-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A two-phase Mg-9Li alloy (where the composition is in weight per cent) was made fine grained (d≈6-35 μm) by extensive cold rolling into foils and press bonding the foils at low homologous temperatures. The material exhibited superplastic properties in the temperature range 423-523 K ((0.49-0.61)T/Tm) with elongations to failure as high as 460%. The creep rate was determined to be inversely proportional to approximately the square of grain size and to the second power of stress. The activation energy for superplastic flow was equal to that for lattice diffusion in the major b.c.c. β phase. The Mg-9Li laminate alloy was found to be similar in its flow characteristics to MA-21, a multicomponent Mg-8.1Li fine-grained commercial Soviet alloy. © 1990.

引用

页码：195 / 202

页数：8

共 36 条

[31]

SLICHTER CP, 1955, REP C DEFECTS CRYSTA, P52

[32] MECHANICAL-BEHAVIOR OF SUPERPLASTIC ULTRAHIGH CARBON-STEELS AT ELEVATED-TEMPERATURE [J].

WALSER, B ;

SHERBY, OD .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1979, 10 (10) :1461-1471

[33] THE STRUCTURE DEPENDENCE OF POWER LAW CREEP [J].

WALSER, B ;

SHERBY, OD .

SCRIPTA METALLURGICA, 1982, 16 (02) :213-219

[34]

Weertman J., 1968, T AM SOC MET, V61, P681

[35]

WHITE RA, 1978, THESIS STNFORD U STA

[36]

WYSS RK, 1988, ADV MAGNESIUM ALLOYS, P25

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