66 Hydrogen Solubility and Diffusion in Metastable Austenitic Stainless Steels Studied with Thermal Desorption Spectroscopy Available to Purchase

Hydrogen solubility and diffusion in metastable austenitic stainless steels AISI 304, AISI 301LN, AISI 201 and AISI 204Cu are studied with thermal desorption spectroscopy in their solution annealed and pre-strained states. Hydrogen was induced by electrochemical hydrogen charging. Temperature dependencies of hydrogen desorption for the studied steels manifest a complex peak situated from 400 to 500 K. Pre-straining of the steels results in TDS peak broadening and its shift to lower temperatures caused by the martensite phase formation. Diffusion parameters were obtained by the proposed model and compared for the studied steels. The model is modified for the analysis of pre-strained materials. Hydrogen solubility and diffusion coefficient in the martensite phase of the pre-strained steels are estimated.