摘要
研究了Mg-9Gd-4Y-0.6Zr合金挤压T5态在250-400℃之间的高温组织与力学性能。结果表明:该合金具有非常优异的高温力学性能,其力学性能明显优于WE54;该合金在250、300、350和400℃时的抗拉伸强度分别为348、262、150和62MPa;该合金在400℃拉伸时还具有粗晶超塑性,晶界上有再结晶的细晶,晶内有大量孪晶同时共存。
The microstructures and mechanical properties of the extruded Mg-9Gd-4Y-0. 6Zr-T5 at temperatures between 250 ℃ and 400℃ were investigated. The results show that this alloy has outstanding mechanical properties and high heat-resistance, and its mechanical properties are markedly better than those of WE54. The tensile strength of this alloy at 250, 300, 350 and 400 ℃ are 348, 262, 150 and 62 MPa, respectively. In tensile test at 400 ℃, the sample shows a coarse-grained superplasticity, which is not reported, and a great deal of recrystallized grains are found on grain boundaries and a lot of twins occur within the grains.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2006年第4期709-714,共6页
The Chinese Journal of Nonferrous Metals
基金
国家安全重大基础研究项目资助项目(5133001E)
国防预研基金资助项目(51412020304QT7106)
国家高技术研究发展计划资助项目(2003AA741043)
湖南省自然科学基金资助项目(2003JJY4051)
关键词
Mg—Gd—Y-Zr合金
耐热镁合金
高温力学性能
T5态
粗晶超塑性
Mg-Gd-Y-Zr alloy
heat-resistant magnesium alloy
high temperature mechanical properties
T5 temper
coarse-grained superplasticity