Effects of Al and Ti on thermal expansion behavior of a Ni-Fe-Cr-based superalloy: A combined experimental and first-principle study

doi:10.1016/j.jmrt.2024.02.080

IMR OpenIR

	Effects of Al and Ti on thermal expansion behavior of a Ni-Fe-Cr-based superalloy: A combined experimental and first-principle study
	Cheng, Sihan 1,2; Qin, Xuezhi 1,3; Wen, Bin 4; Wang, Jiaqi 1,2; Wu, Yunsheng 1,3; Zhou, Lanzhang 1,3
通讯作者	Qin, Xuezhi(xzqin@imr.ac.cn) ; Zhou, Lanzhang(lzzhou@imr.ac.cn)
	2024-03-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	29 页码:3805-3812
摘要	The effects of Al and Ti on the thermal expansion coefficient (TEC) of a Ni-Fe-Cr-based superalloy, for the application of advanced ultra-supercritical (A-USC) systems, were investigated by combining the experiments and first-principles calculations. The results imply that MC/M23C6 carbides and grain boundary seem to play a minor role in the TEC of alloys due to their relatively low proportions. Al and Ti elements increase the TEC of alloys when present in gamma matrix, but they decrease the TEC value by taking part in the formation of gamma ' phase. When the amount of gamma ' phase is low, the TEC of alloys at 600-700 degrees C is dominated by gamma matrix, and consequently shows an increasing or constant trend with the increase of Al + Ti content. Replacing Al element with Ti element decreases the TEC of alloys in two ways: directly by reducing the TECs of gamma matrix and gamma ' phase, and indirectly by increasing the amount of gamma ' phase. These results can provide the theoretical basis and beneficial guidelines for the composition design and optimization of low-expansion superalloys.
关键词	Ni-Fe-Cr-based superalloy Thermal expansion Microstructure First -principles Aluminium Titanium
资助者	National Natural Science Foundation of China
DOI	10.1016/j.jmrt.2024.02.080
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51871213] ; National Natural Science Foundation of China[51925105]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001194362100001
出版者	ELSEVIER
引用统计	被引频次：4[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/321006/185098
专题	中国科学院金属研究所
通讯作者	Qin, Xuezhi; Zhou, Lanzhang
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 4.Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Sihan,Qin, Xuezhi,Wen, Bin,et al. Effects of Al and Ti on thermal expansion behavior of a Ni-Fe-Cr-based superalloy: A combined experimental and first-principle study[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,29:3805-3812.
APA	Cheng, Sihan,Qin, Xuezhi,Wen, Bin,Wang, Jiaqi,Wu, Yunsheng,&Zhou, Lanzhang.(2024).Effects of Al and Ti on thermal expansion behavior of a Ni-Fe-Cr-based superalloy: A combined experimental and first-principle study.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,29,3805-3812.
MLA	Cheng, Sihan,et al."Effects of Al and Ti on thermal expansion behavior of a Ni-Fe-Cr-based superalloy: A combined experimental and first-principle study".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 29(2024):3805-3812.