Atomic-scale understanding of the effects of Cr and Ti on γ′ growth kinetics in the Ni-Al-X ternary system: Diffusion couple technique and DFT study

doi:10.1016/j.jmrt.2025.01.097

IMR OpenIR

	Atomic-scale understanding of the effects of Cr and Ti on γ′ growth kinetics in the Ni-Al-X ternary system: Diffusion couple technique and DFT study
	Gao, Xinyu 1,2; Tian, Yuan 3; Wen, Xin 1,2; Qiao, Shichang 1,2; Wang, Fengzhen 1,2; Li, Na 1,2; Xia, Zhikang 1,2; Wang, Yongqianag 2; Liu, Shuai 2; Yuan, Chao 1,2
通讯作者	Liu, Shuai(shuailiu@imr.ac.cn) ; Yuan, Chao(ychao@imr.ac.cn)
	2025-03-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	35 页码:1311-1322
摘要	Cr and Ti are essential elements in Ni-based superalloys for gamma solid solution strengthening and gamma ' precipitation strengthening, respectively, enhancing high-temperature performance. Despite the known benefits of high concentrations, the effects of lower Cr and Ti concentrations on gamma ' precipitation kinetics remain unclear. This study investigates the temporal evolution of gamma ' phase in Ni-Al-X (X = Cr, Ti) system, utilizing diffusion-couple alongside aberration-corrected transmission electron microscopy to unveil atomic-scale effects. Experimental results demonstrate that Cr and Ti accelerate gamma ' phase formation due to competition between lattice misfit and interdiffusion. Moreover, gamma ' phase forms through an order-disorder transition, regulated by alloy type. Firstprinciples calculations indicate that Cr and Ti favor gamma ' phase formation thermodynamically and kinetically. Al compressibility from Cr and Ti doping promotes gamma ' formation. These insights aid in designing Ni-based superalloys with improved microstructural stability and high-temperature performance.
关键词	Ni-based alloy Diffusion couple Precipitation kinetic Solid state phase transformation First-principles
资助者	Liaoning ST Project
DOI	10.1016/j.jmrt.2025.01.097
收录类别	SCI
语种	英语
资助项目	Liaoning ST Project[2023JH1/10400054]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001404866800001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/180426
专题	中国科学院金属研究所
通讯作者	Liu, Shuai; Yuan, Chao
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Dalian Jiaotong Univ, Sch Mat Sci & Engn, Dalian 116028, Peoples R China
推荐引用方式 GB/T 7714	Gao, Xinyu,Tian, Yuan,Wen, Xin,等. Atomic-scale understanding of the effects of Cr and Ti on γ′ growth kinetics in the Ni-Al-X ternary system: Diffusion couple technique and DFT study[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2025,35:1311-1322.
APA	Gao, Xinyu.,Tian, Yuan.,Wen, Xin.,Qiao, Shichang.,Wang, Fengzhen.,...&Yuan, Chao.(2025).Atomic-scale understanding of the effects of Cr and Ti on γ′ growth kinetics in the Ni-Al-X ternary system: Diffusion couple technique and DFT study.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,35,1311-1322.
MLA	Gao, Xinyu,et al."Atomic-scale understanding of the effects of Cr and Ti on γ′ growth kinetics in the Ni-Al-X ternary system: Diffusion couple technique and DFT study".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 35(2025):1311-1322.