Enhancement of ductility in high strength Mg-Gd-Y-Zr alloy

被引：38

作者：

Gao Lei ^{[1
,2
]}

Chen Rong-shi ^{[1
]}

Han En-hou ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2011年 / 21卷 / 04期

关键词：

Mg-Gd-Y alloy; ductility; multiaxial forging; microstructure; dynamic precipitate; SEVERE PLASTIC-DEFORMATION; MAGNESIUM ALLOY; GRAIN-REFINEMENT; MECHANICAL-PROPERTIES; MICROSTRUCTURE;

D O I：

10.1016/S1003-6326(11)60794-2

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A high strength GW94 alloy with fully recrystallized microstructure and equiaxed ultrafine grains of submicron size was produced by multiaxial forging and ageing. The alloy exhibits an ultimate tensile strength of 377 MPa, proof stress of 295 MPa and elongation to failure of 21.7%. The ductility is improved in comparison with that of the conventional extrusion processing. Superplastic ductility is achieved in tensile testing at 573 K with a maximum elongation of 450%. These high ductility and high strength are attributed to the coexistence of fully recrystallized grains and nanoscale Mg-5(Gd, Y) particles dynamically precipitated at grain boundaries.

引用

页码：863 / 868

页数：6

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