Precipitation Strengthening in Titanium Alloys from First Principles Investigation

doi:10.11900/0412.1961.2022.00096

IMR OpenIR

	Precipitation Strengthening in Titanium Alloys from First Principles Investigation
	Cheng Kun 1,2; Chen Shuming 1,2; Cao Shuo 1; Liu Jianrong 1; Ma Yingjie 1; Fan Qunbo 3; Cheng Xingwang 3; Yang Rui 1; Hu Qingmiao 1
通讯作者	Hu Qingmiao(qmhu@imr.ac.cn)
	2024-04-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	60 期号:4 页码:537-547
摘要	Titanium alloys have shown wide application potential in the areas such as aerospace and marine because of their comprehensive properties, including high specific strength, ductility, corrosion resistance, and damage tolerance. Given the rapid development of new-generation advanced mili-tary hardware toward large scale, high-speed, light-weight, and structure-complicated titanium alloys experience increasingly harsh application environments. Thus, developing novel high-strength and high-toughness titanium alloys is an important direction in the field of titanium research. To date, the compositional design of titanium alloys is performed within the framework of some empirical rules without involving strengthening and toughening mechanisms. This kind of approach can hardly achieve an accurate and efficient material design. Based on the above mentioned background, the effect of alloying on the precipitation strengthening of the alpha + beta dual-phase titanium alloy was studied by using the first-principles exact muffin-tin orbital method in combination with a coherent potential approximation. High-strength and high-toughness titanium alloys obtain its high strength through precipitation strengthening in the beta-phase matrix with alpha-phase precipitates. The influence of alloying on the precipitation strengthening is crucial to the understanding and prediction of alloy strength and rational alloy design. In the present work, the elastic moduli and lattice constants of a serial binary titanium alloy Ti-xM (M = Al, V, Cr, Mn, Fe, Co, Ni, Nb, Mo, Ta, W) against the composition x were calculated using the first-principles method. Based on which, the elastic moduli of the titanium alloy with a complex composition (such as Ti-Al-V and Ti55521) were evaluated using the concept of elastic Mo equivalency. Subsequently, the precipitation strengthening of binary titanium alloys and the Ti55521 alloy was evaluated by using the elastic modulus within the framework of the modulus strengthening model. Result shows that alloying elements, such as Co, Fe, W, Mo, Ni, and Mn, have the strongest precipitation strengthening effect for the same particle size and volume fraction of alpha precipitates, followed by Cr, Nb, and Ta, whereas V is the weakest. The strengthening effect increases with the content of alloying element. For the Ti55521 alloy prepared by using a thermal mechanical process, subsequent short-time aging weakens the precipitation strengthening effect compared with long-time aging .
关键词	first principles titanium alloy elastic modulus precipitation strengthening strength
资助者	National Natural Science Foundation of China ; National Science and Technology Major Project ; China Postdoctoral Science Foundation
DOI	10.11900/0412.1961.2022.00096
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52071315] ; National Natural Science Foundation of China[U2106215] ; National Natural Science Foundation of China[52001307] ; National Science and Technology Major Project ; China Postdoctoral Science Foundation[2019M661149]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001208569500012
出版者	SCIENCE PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/185791
专题	中国科学院金属研究所
通讯作者	Hu Qingmiao
作者单位	1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Beijing Univ Technol, Sch Mat Sci & Technol, Natl Key Lab Sci & Technol Mat Shock & Impact, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Cheng Kun,Chen Shuming,Cao Shuo,et al. Precipitation Strengthening in Titanium Alloys from First Principles Investigation[J]. ACTA METALLURGICA SINICA,2024,60(4):537-547.
APA	Cheng Kun.,Chen Shuming.,Cao Shuo.,Liu Jianrong.,Ma Yingjie.,...&Hu Qingmiao.(2024).Precipitation Strengthening in Titanium Alloys from First Principles Investigation.ACTA METALLURGICA SINICA,60(4),537-547.
MLA	Cheng Kun,et al."Precipitation Strengthening in Titanium Alloys from First Principles Investigation".ACTA METALLURGICA SINICA 60.4(2024):537-547.