Local Strain Fields of LPSO in Mg-Based Ternary Alloys

被引：6

作者：

Matsunaga, Shuhei ^{[1
]}

Kiguchi, Takanori ^{[2
]}

Sato, Kazuhisa ^{[2
]}

Konno, Toyohiko J. ^{[2
]}

机构：

[1] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Sendai, Miyagi 9808579, Japan

[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

MATERIALS TRANSACTIONS | 2015年 / 56卷 / 07期

关键词：

magnesium alloy; long-period stacking ordered structure; local strain; atomic radius; scanning transmission electron microscopy; ZN ALLOYS; Y-ALLOY; PERIOD; STRENGTH; ORDER; SYSTEM; PHASE;

D O I：

10.2320/matertrans.MH201404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

L1(2)-type TM6RE8 clusters are distributed in enriched layers of LPSO (long period stacking ordered structure), and shrink in the [0001](Mg) direction. The growth mechanism of LPSOs was investigated from the viewpoint of a local strain field. The strength of out-of plane normal strain of the enriched layer varied with the average radius of solute elements in the layer. The first principle calculation showed that there is a relationship between the average atomic radius of solute elements and the structural relaxation in the clusters. Zn conclusion, it is suggested that the difference of average atomic radius between Mg and solute elements controls the degree of the cluster shrinkage by the displacement of the solute elements, and that it is the dominant factor giving rise to the out-of plane normal strains of the enrichment layers.

引用

页码：923 / 927

页数：5

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