IMR OpenIR
(TiZrNbTa)-Mo high-entropy alloys: Dependence of microstructure and mechanical properties on Mo concentration and modeling of solid solution strengthening
Wang, SP; Xu, J; Xu, J (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
2018-04-01
Source PublicationINTERMETALLICS
ISSN0966-9795
Volume95Pages:59-72
AbstractIn this work, the evolution of microstructure and fundamental mechanical properties with Mo concentration in the arc-melted (TiZrNbTa)(100-x)Mo-x (0 <= x <= 20) high-entropy alloys (HEAs) are investigated. The arc-melted (TiZrNbTa)(100-x)Mo-x alloys structurally consist of two bcc phases. The change in volume fractions of two phases in the microstructure is insignificant with Mo concentration, at levels of similar to 75% for bcc1 and similar to 25% for bcc2. The increases in microhardness and Young's modulus of the alloys linearly scale with Mo concentration. To compromise the strength and ductility, the (TiZrNbTa)(90)Mo-10 exhibits an optimal combination of stiffness (E = 137 GPa), compressive yield strength (sigma(y) = 1370 MPa) and deformability (epsilon(p) approximate to 25%). In addition, it is indicated that dislocation widths in bcc lattice of refractory HEAs are insensitive to the alloying complexity, reflecting that the Peierls barrier is excluded as a predominant factor of strengthening. Furthermore, a simple model is proposed to reveal the solid solution hardening (SSH) in bcc refractory HEAs, in which the solid solutions are treated as an imposition of distortion-free and distorted lattices. By applying this model to archived refractory HEAs, the predicted yield strength agrees well with experimentally measured values. It provides a simple empirical tool used for predicting the strength of bcc refractory HEAs and to assist new alloy design.; In this work, the evolution of microstructure and fundamental mechanical properties with Mo concentration in the arc-melted (TiZrNbTa)(100-x)Mo-x (0 <= x <= 20) high-entropy alloys (HEAs) are investigated. The arc-melted (TiZrNbTa)(100-x)Mo-x alloys structurally consist of two bcc phases. The change in volume fractions of two phases in the microstructure is insignificant with Mo concentration, at levels of similar to 75% for bcc1 and similar to 25% for bcc2. The increases in microhardness and Young's modulus of the alloys linearly scale with Mo concentration. To compromise the strength and ductility, the (TiZrNbTa)(90)Mo-10 exhibits an optimal combination of stiffness (E = 137 GPa), compressive yield strength (sigma(y) = 1370 MPa) and deformability (epsilon(p) approximate to 25%). In addition, it is indicated that dislocation widths in bcc lattice of refractory HEAs are insensitive to the alloying complexity, reflecting that the Peierls barrier is excluded as a predominant factor of strengthening. Furthermore, a simple model is proposed to reveal the solid solution hardening (SSH) in bcc refractory HEAs, in which the solid solutions are treated as an imposition of distortion-free and distorted lattices. By applying this model to archived refractory HEAs, the predicted yield strength agrees well with experimentally measured values. It provides a simple empirical tool used for predicting the strength of bcc refractory HEAs and to assist new alloy design.
description.department[wang, shao-ping ; xu, jian] chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, liaoning, peoples r china ; [wang, shao-ping] univ chinese acad sci, 19a yuquan rd, beijing 100049, peoples r china
KeywordTensile Properties Multicomponent Alloys Plastic-deformation Cubic Metals Biocompatibility Stability Crystals Implants
Subject AreaChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [51571192]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79393
Collection中国科学院金属研究所
Corresponding AuthorXu, J (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Wang, SP,Xu, J,Xu, J . (TiZrNbTa)-Mo high-entropy alloys: Dependence of microstructure and mechanical properties on Mo concentration and modeling of solid solution strengthening[J]. INTERMETALLICS,2018,95:59-72.
APA Wang, SP,Xu, J,&Xu, J .(2018).(TiZrNbTa)-Mo high-entropy alloys: Dependence of microstructure and mechanical properties on Mo concentration and modeling of solid solution strengthening.INTERMETALLICS,95,59-72.
MLA Wang, SP,et al."(TiZrNbTa)-Mo high-entropy alloys: Dependence of microstructure and mechanical properties on Mo concentration and modeling of solid solution strengthening".INTERMETALLICS 95(2018):59-72.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, SP]'s Articles
[Xu, J]'s Articles
[Xu, J (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, SP]'s Articles
[Xu, J]'s Articles
[Xu, J (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, SP]'s Articles
[Xu, J]'s Articles
[Xu, J (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.