Deakin University
Browse

File(s) under permanent embargo

The mechanism of aqueous stress-corrosion cracking of α + β titanium alloys

Version 2 2024-06-03, 15:48
Version 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 Wu
In 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 science

Volume

125

Pagination

29-39

Location

Amsterdam, The Netherlands

ISSN

0010-938X

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2017, Elsevier Ltd.

Publisher

Elsevier