Achieving a large-area bulk ultrafine-grained titanium alloy with high thermal stability via layer-by-layer multi-pass overlapping friction stir processing

doi:10.1016/j.jmrt.2024.06.002

IMR OpenIR

	Achieving a large-area bulk ultrafine-grained titanium alloy with high thermal stability via layer-by-layer multi-pass overlapping friction stir processing
	Han, M.1,2; Wu, L. H.2; Li, N.2; Xue, P.2; Ni, D. R.2; Xiao, B. L.2; Ma, Z. Y.2
通讯作者	Wu, L. H.(lhwu@imr.ac.cn) ; Ni, D. R.(drni@imr.ac.cn)
	2024-05-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	30 页码:9371-9380
摘要	It is difficult to prepare large -area bulk ultrafine-grained (UFGed) titanium alloys with uniform structure via multi -pass overlapping friction stir processing (MP-FSP) due to the low thermal conductivity and poor flow deformation ability of titanium alloys. Here, we proposed a new layer -by -layer MP-FSP method to control the defect and microstructure of the Ti-6Al-4V alloy. As a result, the as -cast coarse microstructure was changed directly to the defect -free large -area bulk UFG microstructure. The bulk UFG exhibited a uniform microstructure with average grain sizes of 0.7-0.82 mu m and over 90% of high angle grain boundaries. Moreover, the bulk UFG titanium alloy exhibited high hardness (357 HV) and great ultimate tensile strength (1177 MPa), which were much higher than those (308 HV and 739 MPa) of the base material. In addition, the bulk UFG had good thermal stability at a high temperature of 700 degrees C. Different from the bulk MP-FSP UFGed aluminium alloys where there is generally abnormal grain growth (AGG) at high temperatures, there was no AGG phenomenon in bulk MP-FSP UFGed titanium alloys even at 900 degrees C. This study provides an effective short -process method for preparing largearea bulk UFG titanium alloys with uniform structure and good thermal stability.
关键词	Titanium alloys Friction stir processing Microstructure Bulk ultrafine grains Thermal stability
资助者	Shi Changxu Innova- tion Center for Advanced Materials ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
DOI	10.1016/j.jmrt.2024.06.002
收录类别	SCI
语种	英语
资助项目	Shi Changxu Innova- tion Center for Advanced Materials[SCXKFJJ202210] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2021193] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[Y2021061]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001257652200001
出版者	ELSEVIER
引用统计	被引频次：5[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/321006/187521
专题	中国科学院金属研究所
通讯作者	Wu, L. H.; Ni, D. R.
作者单位	1.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Han, M.,Wu, L. H.,Li, N.,et al. Achieving a large-area bulk ultrafine-grained titanium alloy with high thermal stability via layer-by-layer multi-pass overlapping friction stir processing[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2024,30:9371-9380.
APA	Han, M..,Wu, L. H..,Li, N..,Xue, P..,Ni, D. R..,...&Ma, Z. Y..(2024).Achieving a large-area bulk ultrafine-grained titanium alloy with high thermal stability via layer-by-layer multi-pass overlapping friction stir processing.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,30,9371-9380.
MLA	Han, M.,et al."Achieving a large-area bulk ultrafine-grained titanium alloy with high thermal stability via layer-by-layer multi-pass overlapping friction stir processing".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 30(2024):9371-9380.