铸造2026，Vol.75Issue(7)：779-785,7.DOI:10.27014/j.cnki.zhuzao.2026.0099
Ta含量对Ti48Al2Cr2Nb合金组织与力学性能的影响
The Effect of Ta Content on the Microstructure and Mechanical Properties of Ti48Al2Cr2Nb Alloy
摘要
Abstract
Ti48Al2Cr2NbxTa(x=0,1,2,4,atomic fraction/％)alloys were prepared by vacuum non-consumable arc melting,and the influence of Ta content on microstructural evolution and mechanical properties of the alloys was investigated.The results show that the alloy without Ta exhibits a coarse lamellar microstructure.As the Ta content increases,the microstructure is gradually refined and the precipitated phases become denser.The as-cast alloys are primarily composed of γ-TiAl and α2-Ti3Al phases.When the Ta content is 2％,the precipitated phases increase significantly,and the alloy shows a clear network and cellular structure with the best uniformity.With the increase of Ta content,the alloy hardness follows a trend of first increasing,then decreasing,and finally increasing.The 2％Ta alloy has a lower hardness and the highest compressive strength and ductility at both room and high temperatures.All alloys show brittle fracture at room temperature compression,and the 2％Ta alloy exhibits superior crack propagation resistance.关键词
TiAl合金/Ta合金化/微观组织/力学性能/真空电弧熔炼/铸造合金Key words
TiAl alloy/Ta alloying/microstructure/mechanical property/vacuum arc melting/cast alloy分类
矿业与冶金引用本文复制引用
张新房,李广垠,陈占兴,邢秋玮,方虹泽,陈瑞润..Ta含量对Ti48Al2Cr2Nb合金组织与力学性能的影响[J].铸造,2026,75(7):779-785,7.基金项目
河南省重点研发专项(No.251111231400) （No.251111231400）
河南省自然科学基金(No.252300420066) （No.252300420066）
河南省国际科技合作项目(No.252102520046) （No.252102520046）
郑州航院研究生创新计划(No.2026cx201). （No.2026cx201）
