Precipitation in Mg-(4-13)%Li-(4-5)%Zn Ternary Alloys
Precipitation in Mg-(4-13)%Li-(4-5)%Zn Ternary Alloys
复制标题
DOI：
10.2320/matertrans.44.619
复制
发表时间：
2003-04
影响因子：
1.2
通讯作者：
A. Yamamoto;T. Ashida;Yoshio Kouta;K. Kim;S. Fukumoto;H. Tsubakino
中科院分区：
文献类型：
--
作者：
A. Yamamoto;T. Ashida;Yoshio Kouta;K. Kim;S. Fukumoto;H. Tsubakino
用显微维氏硬度计和透射电子显微镜研究了含4~13%Li和4~5%Zn(质量分数)的镁锂锌三元合金中的析出物，包括单相、单相和双相。合金中存在时效硬化现象，这是由于稳定的(⁄)相的析出所致，其取向关系如下：1⁄2 10 10 k 1 Al0 0 0 1？k in1 1 1 1？在(TAPE)相合金中，亚稳O相和亚稳O相的析出发生在与晶界和晶界处。与0的取向关系为：⁄2 0 0 0 1k 1 1 0，1⁄2 0 110 k 1 1 11 0。合金的时效硬化是由O相的析出引起的，过时效是由和相的析出引起的。
Precipitations in Mg–Li–Zn ternary alloys containing 4 to 13%Li and 4 to 5%Zn (in mass%) with or single phase, or with ( þ ) dual phases were investigated using a micro-Vickers hardness measurement and transmission electron microscopy. Age hardening in the phase alloy was found to occur, which was attributed to the precipitation of the stable (MgLiZn) phase with the following orientation relationships: 1⁄210 10 k 1⁄2110 , ð0001Þ k ð1 1 1Þ . In the ( þ ) phases alloy, the precipitation of the phase together with the metastable 0 (MgLi2Zn) phase occurred at grain boundaries between the and , and also and grains. The orientation relationships between the and 0 were as follows; ð0001Þ k ð01 1Þ 0 , 1⁄20 110 k 1⁄2111 0 . Age hardening in the alloy was caused by the precipitation of the 0 phase and over-aging was attributed to the precipitation of the and phases.