Printability,microstructures and mechanical properties of a novel Co-based superalloy fabricated via laser powder bed fusion  

作　　者：Chuan Guo Zhen Xu Gan Li Jingchen Wang Xiaogang Hu Ying Li Xiaohan Chen Hui Liu Le Cheng Shiyu Zhong Qiang Zhu Jian Lu 

机构地区：[1]CityU-Shenzhen Futian Research Institute,Shenzhen 518045,China [2]Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen 518055,China [3]Department of Mechanical Engineering,Shenyang National Laboratory for Materials Science,Greater Bay Joint Division,City University of Hong Kong,Tat Chee Avenue,Kowloon,Hong Kong,China [4]Centre for Advanced Structural Materials,City University of Hong Kong Shenzhen Research Institute,Greater Bay Joint Division,Shenyang National Laboratory for Materials Science,Shenzhen 518057,China

出　　处：《Journal of Materials Science & Technology》2024年第22期96-109,共14页材料科学技术（英文版）

基　　金：supported by the Shenzhen-Hong Kong Sci-ence and Technology Innovation Cooperation Zone Shenzhen Park Project(Grant No.HZQB-KCZYB-2020030);the RGC Theme-based Research Scheme(Grant No.AoE/M-402/20);National Nat-ural Science Foundation of China(Grant No.52250710160);Shenzhen Science and Technology Innovation Committee(Grant Nos.KQTD20170328154443162,JCYJ20210324104610029,and JCYJ20220818100613028).

摘　　要：High levels of Al and Ti in superalloy compositions normally lead to cracking formation during the laser powder bed fusion process,while these elements are key constituents of strengthening phases.In the current study,a novel Co-based superalloy with the basic chemical composition of Co-Al-W-Ta-Ti resolved this contradiction,indicating that the part was formed without cracking and simultaneously contained a large amount of strengthening precipitates in the microstructure fabricated via laser powder bed fusion.The printability,microstructures,and mechanical properties of the sample were analysed before and after heat treatment,providing a potential superalloy that can replace Ni-based superalloys fabricated by additive manufacturing in aerospace and other industries with higher temperature and more efficiency.

关 键 词：Co-based superalloy Laser powder bed fusion PRINTABILITY MICROSTRUCTURE Mechanical properties 

分 类 号：TG665[金属学及工艺—金属切削加工及机床] TG132.3[一般工业技术—材料科学与工程]