Transformation-assisted hydrogen desorption during deformation in steels: Examples of α′- and ε-Martensite

Hydrogen desorption behavior associated with gamma-alpha' and gamma-epsilon martensitic transformation during tensile tests is investigated in four kinds of alloys with different austenite stabilities. Remarkable deformation -induced hydrogen desorption is detected not only as a result of the gamma-epsilon martensitic transformation, but also because of the gamma-epsilon martensitic transformation, and the amount of desorbed hydrogen from transformed alpha' martensite is more than that of transformed e martensite. This suggests that the solubility of hydrogen in the e phase is higher than that in the alpha' martensite but lower than that in austenite. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.