Environmentally Assisted Fatigue in the Gaseous Atmosphere

Environment effect on internal fatigue crack propagation studied with in-situ X-ray microtomography

“…The model from [48] states that hydrogen-caused embrittlement leads to higher crack growth rates under air environment. Corresponding experimental evidences have been made on Ti64 by [39], [33] and [52] but also on other Ti alloys by [37], [43] or [7] (see also [36] and [16] for reviews). In all these studies, the fatigue crack growth rate is lower under vacuum conditions than it is in air environment.…”