期刊
SCRIPTA MATERIALIA
卷 60, 期 2, 页码 108-111出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.09.006
关键词
Titanium alloys; Shot peening; Twinning; SIMS; Silicides
类别
资金
- EPSRC
- RollsRoyce
- Royal Academy of Engineering
- EPSRC [EP/E063497/1, EP/F023464/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E063497/1, EP/F023464/1] Funding Source: researchfish
Peening and associated compressive residual stresses have been universally accepted to improve mechanical behaviour. This paper identifies for the first time conditions for which peening can be deleterious. Peening enhances the surface oxygen enrichment of Ti-834 after thermal exposure. This is attributed to the generation of deformation twins during the peening process, which act as short-circuit diffusional pathways for oxygen. The influence of microtexture and chemistry on the propensity for twinning, and thus oxygen enrichment, is also discussed. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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