Optimized mechanical properties of the hot forged Ti-6Al-4V alloy by regulating multiscale microstructure via laser shock peening

doi:10.1016/j.ijmachtools.2024.104192

IMR OpenIR

	Optimized mechanical properties of the hot forged Ti-6Al-4V alloy by regulating multiscale microstructure via laser shock peening
	Ouyang, Wentai 1,2; Zhang, Li 1; Wu, Haichen 1; Wu, Di 3,4; Zhang, Shuowen 1; Qin, Xiu 1; Jiang, Shilong 4; Li, Shujun 5; Zhang, Wenwu 1,2; Sheng, Liyuan 3,4
通讯作者	Zhang, Wenwu(zhangwenwu@nimte.ac.cn) ; Sheng, Liyuan(lysheng@yeah.net)
	2024-10-01
发表期刊	INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
ISSN	0890-6955
卷号	201 页码:31
摘要	The hot forged Ti-6Al-4V alloy demonstrates well constructed microstructure and balanced mechanical properties, which promotes its wide application in aviation field. However, its relative poor resistance to wear and foreign object impact usually leads to the cumulative damage, causing sudden failure and serious accident. Laser shock peening (LSP) is a novel surface plastic deformation technique, which could strengthen the surface layer of components through gradient grain structure. Nevertheless, the specific mechanism of microstructure evolution and mechanical properties enhancement of LSP processed hot forged Ti-6Al-4V alloy is still obscure, and its corresponding explanation would help the wide application. In the present research, the hot forged Ti-6Al-4V alloy was processed by LSP to regulate its superficial microstructure and improve mechanical properties, helping to understand the inner mechanism. The results reveal that LSP could simultaneously result in the merging of ultrafine alpha-Ti grains and refinement of coarse alpha-Ti grains, which reconstruct the dual-size grain structure. The crystal tilting and transformation promoted by the generation and movement of dislocations benefit the merging of ultrafine grains. Due to the different slip systems in dual phases, beta-Ti phases exhibit much greater response to slip under surface plastic deformation, which are enforced to deform and construct the shell structure by sliding and phase transformation, while the alpha-Ti phases act as the core to synergistically construct 'core-shell' like structure. The increase of LSP impact time promotes the well wrapping of the 'core-shell' like structure and strengthens it by abundant dislocations, which also forms the gradient grain structure from surface to inner. Since the microstructure regulation and crystal defects engineering, the LSP improves the surface damage resistance and mechanical properties of the hot forged Ti-6Al-4V alloy obviously. Such results indicate a new technology to increase the properties of the hot forged Ti-6Al-4V alloy component further.
关键词	Ti-6Al-4V alloy Laser shock peening Core-shell structure Microstructure Wear properties Tensile properties
资助者	National Natural Science Foundation of China ; Guangdong Basic and Applied Basic Research Foundation ; Shenzhen Basic Research Project ; Chinese Postdoctoral Science Foundation ; IER foundation
DOI	10.1016/j.ijmachtools.2024.104192
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[22205012] ; National Natural Science Foundation of China[52305437] ; Guangdong Basic and Applied Basic Research Foundation[2020A1515011301] ; Shenzhen Basic Research Project[JCYJ20210324120001003] ; Shenzhen Basic Research Project[JCYJ20200109 144608205] ; Chinese Postdoctoral Science Foundation[2023M743627] ; IER foundation[IERF202201] ; IER foundation[IERF202202] ; IER foundation[IERF202102]
WOS研究方向	Engineering
WOS类目	Engineering, Manufacturing ; Engineering, Mechanical
WOS记录号	WOS:001280758700001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：31[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/321006/188605
专题	中国科学院金属研究所
通讯作者	Zhang, Wenwu; Sheng, Liyuan
作者单位	1.Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Aero Engine Extreme Mfg Technol Zhejiang P, Ningbo 315201, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Peking Univ, Shenzhen Inst, 15 Gaoxin South 7th Rd, Shenzhen 518057, Peoples R China 4.PKU HKUST Shenzhen Hongkong Inst, Shenzhen 518057, Peoples R China 5.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Ouyang, Wentai,Zhang, Li,Wu, Haichen,et al. Optimized mechanical properties of the hot forged Ti-6Al-4V alloy by regulating multiscale microstructure via laser shock peening[J]. INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE,2024,201:31.
APA	Ouyang, Wentai.,Zhang, Li.,Wu, Haichen.,Wu, Di.,Zhang, Shuowen.,...&Sheng, Liyuan.(2024).Optimized mechanical properties of the hot forged Ti-6Al-4V alloy by regulating multiscale microstructure via laser shock peening.INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE,201,31.
MLA	Ouyang, Wentai,et al."Optimized mechanical properties of the hot forged Ti-6Al-4V alloy by regulating multiscale microstructure via laser shock peening".INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE 201(2024):31.