铸态全片层Ti-46Al-0.5W-0.5Si合金的室温力学性能

被引：3

作者：

陈晖 ^{[1
,2
]}

苏彦庆 ^{[1
]}

骆良顺 ^{[1
]}

李新中 ^{[1
]}

郭景杰 ^{[1
]}

傅恒志 ^{[1
]}

机构：

[1] 哈尔滨工业大学

[2] 东北林业大学

来源：

稀有金属材料与工程 | 2014年 / 43卷 / 02期

基金：

中国博士后科学基金;

关键词：

TiAl合金; 室温拉伸; 室温压缩; 全片层组织;

D O I：

暂无

中图分类号：

TG146.23 [];

学科分类号：

080502 ;

摘要：

对具有柱状晶组织的铸态全片层Ti-46Al-0.5W-0.5Si合金纵向和横向试样进行了室温拉伸、室温压缩和三点弯曲试验,并对拉伸试样断口进行了分析。结果表明:铸态全片层Ti-46Al-0.5W-0.5Si合金力学性能存在强烈的各向异性。横向试样的拉伸性能和弯曲性能远远优于纵向试样,但压缩屈服强度低。合金的力学性能取决于加载轴与片层界面的角度,而不是柱状晶轴的方向。横向拉伸试样的拉应力与片层界面平行,α2/γ片层相界面对裂纹的阻碍作用对提高拉伸性能起到了重要作用。纵向压缩试样的压应力与片层界面垂直,使片层间的微裂纹闭合不扩展,压缩屈服强度较横向试样高。

引用

页码：331 / 335

页数：5

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