The mechanism of aqueous stress-corrosion cracking of α + β titanium alloys
Version 2 2024-06-03, 15:48Version 2 2024-06-03, 15:48
Version 1 2019-02-18, 14:22Version 1 2019-02-18, 14:22
journal contribution
posted on 2024-06-03, 15:48 authored by S Cao, S Zhu, CV Samuel Lim, X Zhou, X Chen, Bruce HintonBruce Hinton, RR Boyer, JC Williams, X WuIn a previous paper (Cao et al., 2017) [1], a transition in fracture mode in aqueous NaCl Stress-Corrosion Cracking (SCC) of Ti-8Al-1Mo–1 V was reported. This paper attempts to unravel the operating mechanism for SCC by dislocation analysis on the Focus Ion Beam (FIB) lift-out foils from pre-crack and the SCC regions. It is shown that both basal and slips are operative in the SCC region while the basal is the only activated system in the pre-crack region. Moreover, there is an increase in dislocation density in the SCC region compared to the pre-crack region. Based on these observations, combined Absorption Induced Dislocation Emission (AIDE) and Hydrogen Enhanced Localized Plasticity (HELP) is proposed to be the operating mechanisms for SCC in α+β titanium alloys.
History
Journal
Corrosion scienceVolume
125Pagination
29-39Location
Amsterdam, The NetherlandsPublisher DOI
ISSN
0010-938XLanguage
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2017, Elsevier Ltd.Publisher
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