摘要
研究了铸态和均匀化处理后的Mg—0.54Zr,Mg—5.68Zn及Mg—5.65Zn—0.50Zr合金的微观结构在三种合金中,均发现有{012}透镜片状孪晶Mg—0.54Zr合金经均匀化处理后产生了ZrH_2相Mg_7Zn_3相呈块状,主要分布于铸态Mg—5.68Zn合金晶界,测定为bcc立方结构(a=1.417nm);经均匀化处理后,Mg_7Zn_3相溶解,产生MgZn_2相铸态Mg-5.65Zn-0.50Zr合金由MgZn_2相和Zn—Zr化合物组成;经均匀化处理后。
Microstructural studies have been made on the Mg-0.54Zr, Mg-5.68Zn andMg-5.65Zn-0.50Zr alloys in the as-cast and homogenenized states. The lenticular plates of{012} twins were found in the three alloys. After homogenization, the ZrH_2 phase formed inthe Mg-0.54Zr alloy. The Mg_7Zn_8 phase of cubic structure with α=1.417 nm distributes atthe grain boundaries of Mg-5.68Zn alloy. After homogenization, the Mg_7Zn_8 phase dissolvesand the MgZn_2 phase occurs. The as-cast Mg-5.65Zn-0.50Zr alloy consists ofMgZn_2 phase and Zn-Zr compounds. After homogenization, the dispersed acicularMgZn_2 phase may precipitate.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第4期A176-A182,共7页
Acta Metallurgica Sinica
基金
航空科学基金
关键词
相结构
孪晶
镁锌锆合金
Mg-Zn-Zr alloy
phase structure
twin
