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Elastically confined martensitic transformation at the nano-scale in a multifunctional titanium alloy
Wang, H. L.; Hao, Y. L.; He, S. Y.; Li, T.; Cairney, J. M.; Wang, Y. D.; Wang, Y.; Obbard, E. G.; Prima, F.; Du, K.; Li, Sj.; Yang, R.; Hao, YL (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
2017-08-15
Source PublicationPERGAMON-ELSEVIER SCIENCE LTD
ISSN1359-6454
Volume135Pages:330-339
AbstractA martensitic transformation (MT) is a typical first-order diffusionless crystal structural change with strong autocatalysis like avalanche at a speed of sound propagation. This unique characteristic, however, is undetectable in some multifunctional titanium alloys. Recently, a nanoscale elastically confined MT mechanism was proposed because a nanoscale Nb modulation in a Ti-Nb based alloy was observed. Here we analyze the elastic confinement in details and its induced novel properties in a wide temperature range. The statistical analyses of atom probe tomography (APT) data confirm the existence of the nano scale Nb concentration modulation. The synchrotron X-ray diffraction (SXRD) profiles demonstrate that the nanoscale Nb modulation causes weak diffuse scattering, as evidenced by the extreme broad diffraction bands. The tensile tests find a critical temperature of similar to 150 K, where the critical stress to induce the MT and Young's modulus reach the minimum and the superelastic strain reaches the maximum (similar to 4.5%) and keeps constant as the temperature decreases further to <4.2 K. To reveal these abnormal behaviors of the MT, the Born criterion governing the elastic stability of cubic crystal is modified by introducing an elastic confinement term and a new Clausius-Clapeyron relationship is established to evaluate the elastically confined MT. The results are consistent with the experimental findings, including the solely stress-induced (no thermally induced) reversibility. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.; A martensitic transformation (MT) is a typical first-order diffusionless crystal structural change with strong autocatalysis like avalanche at a speed of sound propagation. This unique characteristic, however, is undetectable in some multifunctional titanium alloys. Recently, a nanoscale elastically confined MT mechanism was proposed because a nanoscale Nb modulation in a Ti-Nb based alloy was observed. Here we analyze the elastic confinement in details and its induced novel properties in a wide temperature range. The statistical analyses of atom probe tomography (APT) data confirm the existence of the nano scale Nb concentration modulation. The synchrotron X-ray diffraction (SXRD) profiles demonstrate that the nanoscale Nb modulation causes weak diffuse scattering, as evidenced by the extreme broad diffraction bands. The tensile tests find a critical temperature of similar to 150 K, where the critical stress to induce the MT and Young's modulus reach the minimum and the superelastic strain reaches the maximum (similar to 4.5%) and keeps constant as the temperature decreases further to <4.2 K. To reveal these abnormal behaviors of the MT, the Born criterion governing the elastic stability of cubic crystal is modified by introducing an elastic confinement term and a new Clausius-Clapeyron relationship is established to evaluate the elastically confined MT. The results are consistent with the experimental findings, including the solely stress-induced (no thermally induced) reversibility. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
description.department[wang, h. l. ; hao, y. l. ; he, s. y. ; du, k. ; li, sj. ; yang, r.] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, liaoning, peoples r china ; [li, t. ; cairney, j. m.] univ sydney, australian ctr microscopy & microanal, sydney, nsw 2006, australia ; [li, t.] ruhr univ bochum, inst mat, univ str 150, d-44780 bochum, germany ; [cairney, j. m.] ruhr univ bochum, mat res dept, univ str 150, d-44780 bochum, germany ; [li, t.] ruhr univ bochum, zgh, univ str 150, d-44780 bochum, germany ; [wang, y. d.] univ sci & technol beijing, state key lab adv met & mat, beijing 100083, peoples r china ; [wang, y.] xi an jiao tong univ, inst sci & technol, state key lab mech behav mat & frontier, xian 710049, shaanxi, peoples r china ; [wang, y.] ohio state univ, dept mat sci & engn, columbus, oh 43210 usa ; [obbard, e. g.] univ new south wales, dept elect engn & telecommun, sydney, nsw 2052, australia ; [prima, f.] psl res univ, chim paristech cns, inst rech chim paris, f-75005 paris, france
KeywordTitanium Alloy Martensitic Transformation Phase Separation Superelasticity Temperature Dependence
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationMOST of China [2015AA033702, 2016YFC1102600]; NSF of China [51591190, 51271180, 51631007, 51527801]; NSF of US [DMR-1410322]; U.S. Department of Energy [DE-AC02-06CH11357]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79145
Collection中国科学院金属研究所
Corresponding AuthorHao, YL (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Wang, H. L.,Hao, Y. L.,He, S. Y.,et al. Elastically confined martensitic transformation at the nano-scale in a multifunctional titanium alloy[J]. PERGAMON-ELSEVIER SCIENCE LTD,2017,135:330-339.
APA Wang, H. L..,Hao, Y. L..,He, S. Y..,Li, T..,Cairney, J. M..,...&Hao, YL .(2017).Elastically confined martensitic transformation at the nano-scale in a multifunctional titanium alloy.PERGAMON-ELSEVIER SCIENCE LTD,135,330-339.
MLA Wang, H. L.,et al."Elastically confined martensitic transformation at the nano-scale in a multifunctional titanium alloy".PERGAMON-ELSEVIER SCIENCE LTD 135(2017):330-339.
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