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Transformation induced crack deflection in a metastable titanium alloy and implications on transformation toughening
Song, M; He, SY; Du, K; Huang, ZY; Yao, TT; Hao, YL; Li, SJ; Yang, R; Ye, HQ; Du, K (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.
2016-10-01
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume118Pages:120-128
AbstractThe deflection of cracks in grain interior was observed in a metastable beta-phase Ti alloy (Ti-24Nb-4Zr-7.9Sn) with transmission electron microscopy during high cycle fatigue. This peculiar phenomenon is induced by the beta -> alpha" martensitic transformation in front of crack tips in grain interior when cracks propagate along the {011}(beta) slip planes with acute angles between alpha" lamellae and cracks approximately of 45 degrees. The alpha" product phase has lattice dilation and contraction along two main transformation directions, thus introduces compressive and tensile strains perpendicular and parallel to crack propagating planes, respectively. This exerts beneficial effect on the crack deflection during the subsequent cyclic loading. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
description.department[song, m. ; he, s. y. ; du, k. ; huang, z. y. ; yao, t. t. ; hao, y. l. ; li, s. j. ; yang, r. ; ye, h. q.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china
KeywordCrack Deflection Transformation Toughening Ti Alloy Transmission Electron Microscopy
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationSpecial Funds for the Major State Basic Research Projects of China [2012CB619503]; Natural Sciences Foundation of China [51390473, 51371177, 11332010]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/76250
Collection中国科学院金属研究所
Corresponding AuthorDu, K (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Song, M,He, SY,Du, K,et al. Transformation induced crack deflection in a metastable titanium alloy and implications on transformation toughening[J]. ACTA MATERIALIA,2016,118:120-128.
APA Song, M.,He, SY.,Du, K.,Huang, ZY.,Yao, TT.,...&Du, K .(2016).Transformation induced crack deflection in a metastable titanium alloy and implications on transformation toughening.ACTA MATERIALIA,118,120-128.
MLA Song, M,et al."Transformation induced crack deflection in a metastable titanium alloy and implications on transformation toughening".ACTA MATERIALIA 118(2016):120-128.
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