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Title: The effects of hydrogen on fatigue crack growth behaviour of Ti–6Al–4V and Ti–4.5Al–3V–2Mo–2Fe alloys
Authors: Y. S. Ding;L.W. Tsay;C. Chen
Contributors: NTOU:Institute of Materials Engineering
Keywords: A. Titanium;B. SEM;C. Hydrogen embrittlement
Date: 2009-06
Issue Date: 2011-10-20T08:07:34Z
Publisher: Corrosion Science
Abstract: Abstract:The fatigue crack growth rates (FCGRs) of Ti–6Al–4V and Ti–4.5Al–3V–2Mo–2Fe alloys were determined in gaseous hydrogen, air, and a soft vacuum. In hydrogen and at a stress ratio of 0.1, the deflected crack path associated with the localized brittle fracture of the α-phase could account for the reduced FCGR of Ti–6Al–4V. At a higher stress ratio of 0.5, hydrogen embrittlement enhanced cracking and alleviated the effect of crack deflections in Ti–6Al–4V specimens, resulting in the FCGR in hydrogen similar to that in air. In contrast, the FCGR of Ti–4.5Al–3V–2Mo–2Fe was insensitive to both the environment and stress ratio.
Relation: 51(6), pp.1413-1419
URI: http://ntour.ntou.edu.tw/handle/987654321/23727
Appears in Collections:[材料工程研究所] 期刊論文

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