Thermally stable strong <101> texture in additively manufactured cobalt-based superalloys

Yao，Zhifu1,2,3,4; Bao，Longke1,2,4; Yang，Mujin5; Chen，Yuechao6,7; He，Minglin5; Yi，Jiang5; Yang，Xintong1,2,4; Yang，Tao8; Zhao，Yilu4; Wang，Cuiping6,7; Zhong，Zheng3; Wang，Shuai5; Liu，Xingjun1,2,4

2024-03-15

10.1016/j.scriptamat.2023.115942

Scripta Materialia   影响因子和分区

1359-6462

Cobalt-based γ'-strengthened superalloy exhibits tremendous potential in numerous fields, such as power generation equipment and the aerospace industry. The characteristics of laser powder bed fusion technology have aligned well with the demands for superalloy's strong texture or single crystal microstructure. However, the post-heat treatment processes often disrupt the initial microstructure of the as-printed parts due to unavoidable recrystallization. In this study, we obtained a strong <101> texture in an as-printed Co-5Al-14V (at.%) ternary cobalt-based superalloy, which is difficult to achieve in nickel-based superalloys. Intriguingly, this <101> texture remains thermally stable even after aging treatment at a near γ' solvus temperature. Hence, a <101> textured microstructure with an evenly distributed γ'(L12) precipitates was attained, which benefits the improvement of high-temperature creep resistance. The unique microstructure characteristics revealed in this work can be beneficial for the development of cobalt-based superalloys and shed light on the microstructural engineering of other LPBF-manufactured superalloys.

Additive manufacturing Cobalt-based superalloy Laser-powder bed fusion Recrystallization Texture

SCI ; EI

英语

其他

MATERIALS SCIENCE

2-s2.0-85179891227

Scopus

1.State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Shenzhen,518055,China
2.Institute of Materials Genome & Big Data,Harbin Institute of Technology,Shenzhen,518055,China
3.School of Science,Harbin Institute of Technology,Shenzhen,518055,China
4.Department of Materials Science and Engineering,Harbin Institute of Technology,Shenzhen,518055,China
5.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,1088 Xueyuan Blvd,518055,China
6.Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials (Xiamen University),Xiamen,Fujian,361000,China
7.Xiamen Key Laboratory of High-Performance Metals and Materials (Xiamen University),Xiamen,Fujian,361000,China
8.Department of Material Science and Engineering,College of Engineering,City University of Hong Kong,Hong Kong,Hong Kong

Yao，Zhifu,Bao，Longke,Yang，Mujin,et al. Thermally stable strong <101> texture in additively manufactured cobalt-based superalloys[J]. Scripta Materialia,2024,242.

Yao，Zhifu.,Bao，Longke.,Yang，Mujin.,Chen，Yuechao.,He，Minglin.,...&Liu，Xingjun.(2024).Thermally stable strong <101> texture in additively manufactured cobalt-based superalloys.Scripta Materialia,242.

Yao，Zhifu,et al."Thermally stable strong <101> texture in additively manufactured cobalt-based superalloys".Scripta Materialia 242(2024).