Research on microstructure and mechanical properties of Ti-6Al-4V ELI fabricated by hybrid directed energy deposition with in-situ rolling and annealing

doi:10.1016/j.matchar.2024.113914

IMR OpenIR

	Research on microstructure and mechanical properties of Ti-6Al-4V ELI fabricated by hybrid directed energy deposition with in-situ rolling and annealing
	Zhang, Mingbo 1; Fu, Youheng 1,5; Zhang, Haiou 2; Li, Wenyuan 3; Chen, Xi 2; Zhai, Wenzheng 2; Ke, Linda 4; Wang, Guilan 1
通讯作者	Fu, Youheng(fuyouhenghust@qq.com)
	2024-05-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	211 页码:15
摘要	To achieve superior damage tolerance and fatigue properties, it is desirable for the microstructure of Ti-6Al-4V ELI (Extra Low Interstitial) titanium alloy to consist of equiaxed grains with a homogeneous lamellar structure. However, traditional forging and single additive manufacturing techniques require extreme processes such as quasi beta heat treatment and hot isostatic pressing. In this paper, a hybrid directed energy deposition method that integrates in -situ rolling with simple annealing is proposed to simultaneously achieve these microstructures. The results indicate that the initial microstructures produced by hybrid directed energy deposition consist of fine equiaxed prior-beta grains, inconspicuous interpass bright bands, randomly oriented lamellar structure and numerous small substructures at the TEM scale. Due to the plastic deformation caused by in -situ rolling, the primary beta grains underwent significant refinement with a reduction in grain diameter from over 2000 mu m to 113.8 mu m. Besides, the unique microstructures and thickness of alpha laths are influenced by coarsening and dissolution mechanisms that are controlled by diffusion during phase transformation. Furthermore, a uniform microstructure without bright bands and excellent comprehensive properties can be achieved through heating at 880 degrees C for 2 h and natural cooling. These findings validate that hybrid directed energy deposition coupled with simple annealing present a novel and cost-effective approach for the direct manufacturing of uniform titanium alloy forgings.
关键词	Directed energy deposition Ti-6Al-4V Microstructure Mechanical properties Annealing
资助者	Guangdong Basic and Applied Basic Research Foundation ; National Natural Science Foundation of China ; Special Research Program of Civil Aircraft
DOI	10.1016/j.matchar.2024.113914
收录类别	SCI
语种	英语
资助项目	Guangdong Basic and Applied Basic Research Foundation[2023A1515110116] ; National Natural Science Foundation of China[52175169] ; National Natural Science Foundation of China[52175320] ; Special Research Program of Civil Aircraft[MJ-2017-G-*]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:001218562300001
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：3[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/321006/186150
专题	中国科学院金属研究所
通讯作者	Fu, Youheng
作者单位	1.Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Hubei, Peoples R China 2.Huazhong Univ Sci & Technol, Sch Mech Sci & Engn, Wuhan 430074, Hubei, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 4.Shanghai Spaceflight Precis Machinery Inst, Shanghai 201600, Peoples R China 5.Guangdong HUST Ind Technol Res Inst, Dongguan 523808, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Mingbo,Fu, Youheng,Zhang, Haiou,et al. Research on microstructure and mechanical properties of Ti-6Al-4V ELI fabricated by hybrid directed energy deposition with in-situ rolling and annealing[J]. MATERIALS CHARACTERIZATION,2024,211:15.
APA	Zhang, Mingbo.,Fu, Youheng.,Zhang, Haiou.,Li, Wenyuan.,Chen, Xi.,...&Wang, Guilan.(2024).Research on microstructure and mechanical properties of Ti-6Al-4V ELI fabricated by hybrid directed energy deposition with in-situ rolling and annealing.MATERIALS CHARACTERIZATION,211,15.
MLA	Zhang, Mingbo,et al."Research on microstructure and mechanical properties of Ti-6Al-4V ELI fabricated by hybrid directed energy deposition with in-situ rolling and annealing".MATERIALS CHARACTERIZATION 211(2024):15.