Effects of deformation on hydrogen degradation in a duplex stainless steel |
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| Authors: | S. S. Chen T. I. Wu J. K. Wu |
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| Affiliation: | (1) Institute of Materials Engineering, National Taiwan Ocean University, Keelung, 20224, Taiwan Republic of China;(2) Department of Materials Engineering, Tatung University, Taipei, 10451, Taiwan Republic of China;(3) Institute of Materials Engineering, National Taiwan Ocean University, Keelung, 20224, Taiwan Republic of China |
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| Abstract: | Hydrogen embrittlement of annealed, 20 and 40% cold worked 2205 duplex stainless steels has been evaluated using electrochemical permeation measurement, hydrogen microprint technique and tensile test in this study. Due to hydrogen transport in 2205 duplex stainless steel is mainly lattice diffusion in ferritic phase, more hydrogen distribution, higher permeation rate and effective diffusion in ferritic phase were detected. Hydrogen trapping and mechanical property effects were studied for cold worked specimens. Fractographic investigation revealed that hydrogen absorption promoted transgranular fracture in cold worked specimens. These results exhibits that the cold worked duplex stainless steels are more susceptible to hydrogen embrittlement. |
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