Evolution of microstructure and 800?C/294 MPa stress rupture property of cast Ni-based superalloys during long-term thermal exposure: Role and behavior of primary MC carbide

doi:10.1016/j.msea.2023.145416

IMR OpenIR

	Evolution of microstructure and 800?C/294 MPa stress rupture property of cast Ni-based superalloys during long-term thermal exposure: Role and behavior of primary MC carbide
	Qin, X. Z.1,3; Wang, J. Q.1,2; Cheng, S. H.1,2; Wu, Y. S.1,3; Zhou, L. Z.1,3
通讯作者	Qin, X. Z.(xzqin@imr.ac.cn) ; Zhou, L. Z.(lzz@imr.ac.cn)
	2023-08-10
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	881 页码:11
摘要	The role and behavior of primary MC carbide and their effects on the microstructure and stress rupture property of the cast Ni-based superalloys during long-term thermal exposure at elevated temperature are systemically investigated in this work. It is found that the chemical compositions of primary MC are proportional to the Nb/Ti and (Ti + Nb)/(Mo + W) ratios of alloys. During long-term thermal exposure, the thermal stability of primary MC can be quantitatively evaluated by its decomposition degree defined as Dt=(V0-Vt)/V0 x 100%, which is closely associated with the Nb/Ti and (Mo + W)/Cr ratios of alloys. The decomposition process, degree, form and mechanism of primary MC are revealed in detail. The STEM observations with the EDS analyses show that primary MC decomposition is an inter-diffusion process of elements between the primary MC carbide and & gamma; matrix, which can increase the volume fraction of & gamma;' phase, restrain the precipitation of topologically closepacked (TCP) phases and promote the coarsening of grain boundaries (GBs). The combination of these microstructural evolutions, together with the appropriate Al + Ti + Nb and W + Mo contents in the matrix, eventually results in a remarkable improvement in the stress rupture property of long-term thermally exposed cast Ni-based superalloys.
关键词	Cast Ni-based superalloys Primary MC carbide Thermal stability Long-term thermal exposure Microstructure Stress rupture property
资助者	National Natural Science Foundation of China ; National Energy Adminis-tration Program of China
DOI	10.1016/j.msea.2023.145416
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51001101] ; National Natural Science Foundation of China[NY20150102] ; National Energy Adminis-tration Program of China ; [51871213]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001058186900001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：6[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/321006/179003
专题	中国科学院金属研究所
通讯作者	Qin, X. Z.; Zhou, L. Z.
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, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, CAS Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Qin, X. Z.,Wang, J. Q.,Cheng, S. H.,et al. Evolution of microstructure and 800?C/294 MPa stress rupture property of cast Ni-based superalloys during long-term thermal exposure: Role and behavior of primary MC carbide[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,881:11.
APA	Qin, X. Z.,Wang, J. Q.,Cheng, S. H.,Wu, Y. S.,&Zhou, L. Z..(2023).Evolution of microstructure and 800?C/294 MPa stress rupture property of cast Ni-based superalloys during long-term thermal exposure: Role and behavior of primary MC carbide.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,881,11.
MLA	Qin, X. Z.,et al."Evolution of microstructure and 800?C/294 MPa stress rupture property of cast Ni-based superalloys during long-term thermal exposure: Role and behavior of primary MC carbide".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 881(2023):11.