金属间化合物TiAl(W,Si,B)合金的组织稳定性及其蠕变性能

金属学报, 2002, 38(11): 1175-1180. doi: 10.3321/j.issn:0412-1961.2002.11.008

金属间化合物TiAl(W,Si,B)合金的组织稳定性及其蠕变性能

周兰章 ^1, , 郭建亭 ^2, , 肖旋 ^3, , V.Lupinc ^4, , M.Maldini ^5,

1.中国科学院金属研究所,沈阳,110016;辽宁省分析测试研究中心,沈阳,110015

2.中国科学院金属研究所,沈阳,110016

3.辽宁省分析测试研究中心,沈阳,110015

4.CNR-IENI,20125,Milano,Italy

5.CNR-IENI,20125,Milano,Italy

关键词：金属间化合物 , 高温结构材料 , TiAl , 热稳定性 , 蠕变

MICROSTRUCTURAL STABILITY AND CREEP PROPERTIES OF INTERMETALLIC TiAl(W, Si, B) ALLOY

Ti-45Al-2W-0.5Si-0.5B(ABB-23铸造合金在800和900℃长期时效过程中发生组织失稳,包括α2板条断裂和合并,α2相转变为B2相,针状B2相球化和长大,γ等轴晶的生成以及片层间距的增加.ABB-23合金的热稳定性优于无B的ABB-2合金,表明添加B有利于提高合金的热稳定性.ABB-23合金在700--800℃范围内的抗蠕变能力超过同比密度的抗热腐蚀高温合金IN738LC,具有优异的高温蠕变性能.此外,还对比了ABB-23合金与其他几种TiAl基合金的高温蠕变性能.

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金属间化合物TiAl(W,Si,B)合金的组织稳定性及其蠕变性能

MICROSTRUCTURAL STABILITY AND CREEP PROPERTIES OF INTERMETALLIC TiAl(W, Si, B) ALLOY

参考文献