SUPERPLASTIC BEHAVIOR OF A FINE-GRAINED MG-9LI MATERIAL AT LOW HOMOLOGOUS TEMPERATURE

被引：37

作者：

TALEFF, EM

RUANO, OA

WOLFENSTINE, J

SHERBY, OD

机构：

[1] CSIC,CTR NACL INVEST MET,E-28040 MADRID,SPAIN

[2] UNIV CALIF IRVINE,DEPT MECH & AEROSP ENGN,IRVINE,CA 92717

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

来源：

JOURNAL OF MATERIALS RESEARCH | 1992年 / 7卷 / 08期

关键词：

D O I：

10.1557/JMR.1992.2131

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A fine-grained (lBAR = 1.5-mu-m) laminate containing 91.0 wt.% magnesium and 9.0 wt.% lithium was prepared by a foil metallurgy technique involving rolling and pressing at low homologous temperature (0.39-0.49 T(m). The processed material exhibits superplastic characteristics above 70-degrees-C (0.40 T(m)). The strain-rate-sensitivity exponent is about 0.5 and an elongation-to-failure of 450% was obtained at 100-degrees-C (0.43 T(m)). The activation energy for plastic flow in the superplastic region is 65 kJ/mole. This value of the activation energy is related to the expected activation energy for grain boundary diffusion.

引用

页码：2131 / 2135

页数：5

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