Abstract Scope |
In alloys for structural applications, mechanically-induced martensitic transformation can exhibit well-documented beneficial effects, e.g., in delaying plastic instability (through transformation-induced plasticity), or fatigue cracking (through transformation-induced toughening). In presence of hydrogen, however, some of these benefits are lost, and the transformation itself can create preferential cracking sites. Here in this overview talk, phase stability effects in presence of hydrogen will be discussed. The focus will be on Fe-Mn-Co-Cr alloys, and martensitic stainless steels with reverted austenite, showing some light at the end of the tunnel for beneficial metastability effects in presence of hydrogen. |