Novel as-cast Ti-rich refractory complex concentrated alloys with superior tensile properties

doi:10.1007/s40843-023-2705-2

IMR OpenIR

	Novel as-cast Ti-rich refractory complex concentrated alloys with superior tensile properties
	Zeng, Shuai 1,2,3; Zhou, Yongkang 1,2,3; Gao, Hongquan 5; Li, Huan 1,3; Chen, Jingqian 1,2,3; Zhang, Hongwei 1,3; Fu, Huameng 1,3; Wang, Aiming 1,3; Zhang, Haifeng 1,3,4; Zhao, Hongwei 5; Zhu, Zhengwang 1,3,4
通讯作者	Zhu, Zhengwang(zwzhu@imr.ac.cn)
	2023-12-27
发表期刊	SCIENCE CHINA-MATERIALS
ISSN	2095-8226
页码	10
摘要	Refractory complex concentrated alloys (RCCAs) have drawn particular attention for their high yield strength and superior softening resistance at high temperatures. However, poor room-temperature ductility and high density remain the main challenges for their processing and applications. Here, using inherent material characteristics as the alloy-design principles, three novel single-phase body-centered cubic structured Ti3Zr1.5Nb(1-x)MoxVAl0.25 (x = 0.1, 0.3, 0.5, marked as Mo0.1, Mo0.3, and Mo0.5, respectively) RCCAs with promising tensile ductility and relatively low density below 6 g cm(-3) were developed by tailoring the Mo concentration. The introduction of Mo elements with high shear modulus promotes lattice distortion, contributing to enhanced lattice friction stress and yield strength. The Mo0.3 and Mo0.5 alloys exhibit tensile yield strengths exceeding 1100 MPa and high fracture elongation of over 15% in the as-cast state. Labusch's model revealed that solid-solution strengthening induced by atomic size and shear modulus mismatch contributes most significantly to yield strength. Deformation microstructure observations uncovered that the formation of the kink bands, dense-dislocation walls, and Taylor lattices are highly effective in enhancing strain-hardening capacity due to their high density of dislocation boundaries, enabling the alloys to maintain high strength while yet ensuring enough ductility. This study provides new insights into the development of strong and ductile RCCAs with single-phase structures.
关键词	refractory complex concentrated alloys lattice distortion mechanical properties strengthening mechanism deformation behavior
资助者	National Natural Science Foundation of China ; Chinese Academy of Sciences
DOI	10.1007/s40843-023-2705-2
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52074257] ; Chinese Academy of Sciences[ZDBS-LY- JSC023]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:001134898400001
出版者	SCIENCE PRESS
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/321006/183511
专题	中国科学院金属研究所
通讯作者	Zhu, Zhengwang
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.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China 5.Unit 96901 PLA, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Shuai,Zhou, Yongkang,Gao, Hongquan,et al. Novel as-cast Ti-rich refractory complex concentrated alloys with superior tensile properties[J]. SCIENCE CHINA-MATERIALS,2023:10.
APA	Zeng, Shuai.,Zhou, Yongkang.,Gao, Hongquan.,Li, Huan.,Chen, Jingqian.,...&Zhu, Zhengwang.(2023).Novel as-cast Ti-rich refractory complex concentrated alloys with superior tensile properties.SCIENCE CHINA-MATERIALS,10.
MLA	Zeng, Shuai,et al."Novel as-cast Ti-rich refractory complex concentrated alloys with superior tensile properties".SCIENCE CHINA-MATERIALS (2023):10.