Microstructural Stability and Stress Rupture Properties of a Third-Generation Ni Base Single Crystal Supalloy

doi:10.11900/0412.1961.2022.00337

IMR OpenIR

	Microstructural Stability and Stress Rupture Properties of a Third-Generation Ni Base Single Crystal Supalloy
	Liu Jinlai 1; Sun Jingxia 1,2; Meng Jie 1; Li Jinguo 1
通讯作者	Liu Jinlai(jlliu@imr.ac.cn)
	2024-06-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	60 期号:6 页码:770-776
摘要	Single-crystal superalloys have been developed to the 5th generation to improve their temperature capacity. Thus, a rare metal Ru is doped to the 4th and 5th generations based on the 6%Re (with the same mass fraction) contained in third-generation superalloys. Compared with Re addition in low-generation superalloys, improvement of temperature capacity decreases with Ru addition in high-generation superalloys; however, the cost of superalloys containing Ru has increased significantly. Therefore, considerable attention must be paid to the development of third-generation single-crystal superalloys because of their superior cost performance. Thus, considering the slight precipitation of the topologically close-packed (TCP) phase and low properties at the intermediate temperature of third-generation single-crystal superalloys, Al is considered as a significant element affecting microstructure stability, which is determined by calculating the number of electron vacancy (N-v). By reducing 0.4%Al, no TCP phase is precipitated in the superalloy after long-term thermal exposure at 1100 degrees C for 1000 h; therefore, good microstructure stability is obtained. The concentration of Re and Co is decreased slightly to increase the stacking fault energy of the superalloy and to enhance the properties at intermediate temperature. The stress rupture life at 760 degrees C and 800 MPa extends from 40 h to 150 h by reducing 0.4%Al followed with reduction of 0.25%Re and 1%Co. Moreover, the stress rupture properties at high temperature remain unchanged. Based on the abovementioned research, a third-generation single-crystal superalloy is developed, and the causes of stabilization of the microstructure and improvement to properties at intermediate temperature are also discussed.
关键词	third-generation single crystal superalloy microstructure stability stress rupture property Re deformation mechanism
资助者	National Science and Technology Major Project ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; Sichuan Science and Technology Program
DOI	10.11900/0412.1961.2022.00337
收录类别	SCI
语种	英语
资助项目	National Science and Technology Major Project[2019-] ; National Science and Technology Major Project[-0019-0161] ; National Key Research and Development Program of China[2017YFA0700704] ; National Natural Science Foundation of China[51971214] ; Sichuan Science and Technology Program[2022YFSY0016]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001234335000005
出版者	SCIENCE PRESS
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/186733
专题	中国科学院金属研究所
通讯作者	Liu Jinlai
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Liu Jinlai,Sun Jingxia,Meng Jie,et al. Microstructural Stability and Stress Rupture Properties of a Third-Generation Ni Base Single Crystal Supalloy[J]. ACTA METALLURGICA SINICA,2024,60(6):770-776.
APA	Liu Jinlai,Sun Jingxia,Meng Jie,&Li Jinguo.(2024).Microstructural Stability and Stress Rupture Properties of a Third-Generation Ni Base Single Crystal Supalloy.ACTA METALLURGICA SINICA,60(6),770-776.
MLA	Liu Jinlai,et al."Microstructural Stability and Stress Rupture Properties of a Third-Generation Ni Base Single Crystal Supalloy".ACTA METALLURGICA SINICA 60.6(2024):770-776.