IMR OpenIR
Tuning thermal expansion by a continuing atomic rearrangement mechanism in a multifunctional titanium alloy
Gong, D. L.1,2; Wang, H. L.3; Obbard, E. G.4; Li, S. J.1; Yang, R.1; Hao, Y. L.1
Corresponding AuthorHao, Y. L.(ylhao@imr.ac.cn)
2021-07-30
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume80Pages:234-243
AbstractAs to multifunctional titanium alloys with high strength and low elastic modulus, thermal training is crucial to tune their thermal expansion from positive to negative, resulting in a novel linear expansion which is stable in a wide temperature range. Aided by the high-order Hooke's law of elastic solids, a reversible atomic rearrangement mechanism was proposed to explain the novel findings which are unexpected from typical shape memory alloys. To confirm this continuous mechanism, a Ti-Nb based alloy, which possesses a nanoscale spongy microstructure consisting of the interpenetrated Nb-rich and Nb-lean domains produced by spinodal decomposition, was used to trace the crystal structure change by in-situ high energy synchrotron X-ray diffraction analyses. By increasing exposure time, the overlapped diffraction peaks can be separated accurately. The calculated results demonstrate that, in the nanoscale Nb-lean domains, the crystal structure parameters vary linearly with changing temperature along the atomic pathway of the bcc-hcp transition. This linear relationship in a wide temperature range is unusual for first-order martensitic shape memory alloys but is common for Invar alloys with high-order spin transitions. Furthermore, the alloy exhibits smooth DSC curves free of transformation-induced heat peaks observed in shape memory alloys, which is consistent with the proposed mechanism that the reversible transition is of high-order. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordCoefficient of thermal expansion Multifunctional titanium alloys Spongy microstructure Atomic rearrangement Elastic anisotropy
Funding OrganizationNSF of China ; MOST of China ; CAS
DOI10.1016/j.jmst.2020.11.053
Indexed BySCI
Language英语
Funding ProjectNSF of China[51771209] ; NSF of China[51631007] ; NSF of China[51571190] ; MOST of China[2016YFC1102600] ; MOST of China[2017YFC1104901] ; CAS[QYZDJ-SSW-JSC031]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000656122300021
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/160743
Collection中国科学院金属研究所
Corresponding AuthorHao, Y. L.
Affiliation1.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.Dongguan Univ Technol, Sch Mech Engn, Dongguan 523808, Peoples R China
4.Univ New South Wales, Dept Elect Engn & Telecommun, Sydney, NSW 2052, Australia
Recommended Citation
GB/T 7714
Gong, D. L.,Wang, H. L.,Obbard, E. G.,et al. Tuning thermal expansion by a continuing atomic rearrangement mechanism in a multifunctional titanium alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,80:234-243.
APA Gong, D. L.,Wang, H. L.,Obbard, E. G.,Li, S. J.,Yang, R.,&Hao, Y. L..(2021).Tuning thermal expansion by a continuing atomic rearrangement mechanism in a multifunctional titanium alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,80,234-243.
MLA Gong, D. L.,et al."Tuning thermal expansion by a continuing atomic rearrangement mechanism in a multifunctional titanium alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 80(2021):234-243.
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
[Gong, D. L.]'s Articles
[Wang, H. L.]'s Articles
[Obbard, E. G.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Gong, D. L.]'s Articles
[Wang, H. L.]'s Articles
[Obbard, E. G.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Gong, D. L.]'s Articles
[Wang, H. L.]'s Articles
[Obbard, E. G.]'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.