倾斜籽晶法控制镍基单晶高温合金晶体取向研究  

Controlling crystal orientation of Ni-based single crystal superalloy by inclined seeding method

作　　者：杨帅 鲍俊 杨晰琼 郑乔 刘乾 张剑 胡松松 YANG Shuai;BAO Jun;YANG Xiqiong;ZHENG Qiao;LIU Qian;ZHANG Jian;HU Songsong(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;AECC Commercial Aircraft Engine Co.,Ltd.,Shanghai 200241,China;School of Materials Science and Engineering,Xiangtan University,Xiangtan 411105,Hunan,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095 [2]中国航发商用航空发动机有限责任公司,上海200241 [3]湘潭大学材料科学与工程学院,湖南湘潭411105

出　　处：《材料工程》2025年第3期63-69,共7页Journal of Materials Engineering

基　　金：国家自然科学基金项目(52301064);湖南省自然科学基金项目(2022JJ40439)。

摘　　要：本工作提出一种倾斜放置籽晶制备镍基单晶高温合金以获得特定取向单晶铸件的方法,采用实验和数值模拟研究该方法制备单晶过程中凝固组织演化过程及其机制,并讨论了倾斜籽晶控制单晶铸件晶体取向的原理。结果表明:通过改变〈001〉取向的籽晶与铸件之间的位向关系,可以制备出特定取向的单晶铸件。单晶制备过程中籽晶部分回熔,回熔界面与籽晶轴向垂直,定向凝固过程中熔体沿未熔籽晶外延生长形成单晶。An inclined seeding method for Ni-based single crystal superalloy with a specific orientation is presented.The evolution of solidification microstructure and its mechanism are studied during the preparation of single crystals by this method through experiment and numerical simulation.The principle of controlling the crystal orientation of single crystal castings by inclined seeding crystals is discussed.The results show that single crystal castings with specific orientations can be produced by changing the orientation relationship between the〈001〉orientation seed and the casting.During the preparation process of single crystal,the seed is partially un-melted,and the un-melted interface is perpendicular to the seed axial.The melting alloy grows epitaxially along the un-melted seed to form a single crystal casting during the directional solidification process.

关 键 词：镍基单晶高温合金 倾斜籽晶 晶体取向 凝固过程 

分 类 号：TG146[一般工业技术—材料科学与工程] TB31[金属学及工艺—金属材料]