Abstract
Transient and steady state fluxes of hydrogen were measured for annealed and deformed AISI 301, 304 and 310 austenitic and annealed AL 29-4-2 ferritic stainless steel membranes using a gas phase permeation technique at T = 100-350°C. Permeability and effective diffusivity and solubility constants were calculated from these data. Up to 80% deformation of the stable AISI 310 alloy made only a relatively small change in the transport parameters. Deformation of AISI 301 and 304 resulted in various amounts of stress-induced α′ martensite, which greatly enhanced the effective hydrogen diffusivity and permeability. The relationship between phase changes and hydrogen transport parameters was modeled using various assumptions about the microstructure. Effective solubility and diffusivity values are discussed in terms of dislocation trapping and transport. © 1986.