胡轶嵩,金浩,刘荣华,崔玉友,线全刚,杨锐

• 1:沈阳发动机设计研究所
• 2:中国科学院金属研究所

摘要(Abstract)：

在无籽晶的生长条件下,利用光学浮区定向凝固炉制备了Ti-44.5Al-3Nb-0.8Si-0.2C合金定向试棒。从试棒中切取择优取向的晶粒作为籽晶,引晶自身并成功得到片层界面平行生长方向的定向试棒。结果表明,该试棒的室温屈服强度约为722 MPa,伸长率约为3.9%。SEM观察发现,大量条形硅化物在片层组织中析出。实验结果表明:该合金片层组织具有较好的热稳定性,具备引晶功能,但硅化物的存在使得合金室温塑性略低。

关键词(KeyWords)： Ti-44.5Al-3Nb-0.8Si-0.2C合金;光学浮区炉;引晶生长;硅化物

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 胡轶嵩,金浩,刘荣华,崔玉友,线全刚,杨锐

DOI: 10.13289/j.issn.1009-6264.2014.09.009

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