Microstructure and mechanical properties of directionally solidified high-Nb containing Ti–Al alloys
Microstructure and mechanical properties of directionally solidified high-Nb containing Ti–Al alloys
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DOI：
10.1016/j.matdes.2010.02.022
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发表时间：
2010-08
影响因子：
8.4
通讯作者：
Qiuqi Duan;Qingdong Luan;Jing Liu;L. Peng
中科院分区：
文献类型：
--
作者：
Qiuqi Duan;Qingdong Luan;Jing Liu;L. Peng
采用定向凝固技术制备了Ti-16 Al-8 Nb和Ti-16 Al-8 Nb-1 Sn两种高Nb含量的Ti-Al合金。研究了它们的显微组织和室温及高温力学性能。结果表明，添加1%的Sn促进了Ti-Al合金中板条的形成，显著提高了Ti-Al合金的室温强度和高温塑性。合金在室温下表现出准解理断裂特征，在高温下发生明显的塑性变形。
Two high-Nb containing Ti–Al alloys, Ti–16Al–8Nb and Ti–16Al–8Nb–1Sn were fabricated using directional solidification. Their microstructures and mechanical properties at both room and high temperatures were studied. Results showed that the addition of 1% Sn promoted the formation of laths and contributed remarkably to the enhancement in room-temperature strength and high temperature ductility of Ti–Al alloy. The alloys exhibited the feature of quasi-cleavage fracture at room temperature and they experienced significant plastic deformation at high temperatures.