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Metallurgical and Materials Transactions A
Erschienen in: Metallurgical and Materials Transactions A 1/2016

19.10.2015

The Dislocation Mechanism of Stress Corrosion Embrittlement in Ti-6Al-2Sn-4Zr-6Mo

verfasst von: Tamara P. Chapman, Vassili A. Vorontsov, Ananthi Sankaran, David Rugg, Trevor C. Lindley, David Dye

Erschienen in: Metallurgical and Materials Transactions A | Ausgabe 1/2016

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Abstract

An observation of the dislocation mechanisms operating below a naturally initiated hot-salt stress corrosion crack is presented, suggesting how hydrogen may contribute to embrittlement. The observations are consistent with the hydrogen-enhanced localized plasticity mechanism. Dislocation activity has been investigated through post-mortem examination of thin foils prepared by focused ion beam milling, lifted directly from the fracture surface. The results are in agreement with the existing studies, suggesting that hydrogen enhances dislocation motion. It is found that the presence of hydrogen in (solid) solution results in dislocation motion on slip systems that would not normally be expected to be active. A rationale is presented regarding the interplay of dislocation density and the hydrogen diffusion length.
Vorheriger Artikel Effect of Starting Microstructure on the Grain Refinement in Cold-Rolled Low-Carbon Steel During Annealing at Two Different Heating Rates
Nächster Artikel Effect of Al-Si Pack Cementation Diffusion Coating on High-Temperature Low-Cycle Fatigue Behavior of Inconel 713LC

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Metadaten
Titel
The Dislocation Mechanism of Stress Corrosion Embrittlement in Ti-6Al-2Sn-4Zr-6Mo
verfasst von
Tamara P. Chapman
Vassili A. Vorontsov
Ananthi Sankaran
David Rugg
Trevor C. Lindley
David Dye
Publikationsdatum
19.10.2015
Verlag
Springer US
Erschienen in
Metallurgical and Materials Transactions A / Ausgabe 1/2016
Print ISSN: 1073-5623
Elektronische ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-015-3181-0

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