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The Effect of Hydrogen on the Fatigue Properties of Austenitic Stainless Steel

Published online by Cambridge University Press:  07 October 2013

Adam L. Nekimken ,
Patrick D. Ferro ,
John A. Sousa ,
Christine K. Ngan ,
Michael D. Phillips  and
Chauncy N. Cullitan
Adam L. Nekimken
Affiliation:
Mechanical Engineering Department, Gonzaga University, 502 E Boone, Spokane WA, 99258
Patrick D. Ferro
Affiliation:
Mechanical Engineering Department, Gonzaga University, 502 E Boone, Spokane WA, 99258
John A. Sousa
Affiliation:
Mechanical Engineering Department, Gonzaga University, 502 E Boone, Spokane WA, 99258
Christine K. Ngan
Affiliation:
Mechanical Engineering Department, Gonzaga University, 502 E Boone, Spokane WA, 99258
Michael D. Phillips
Affiliation:
Mechanical Engineering Department, Gonzaga University, 502 E Boone, Spokane WA, 99258
Chauncy N. Cullitan
Affiliation:
Physics Department, Gonzaga University, 502 E Boone, Spokane WA, 99258
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Abstract

Hydrogen can be used as an environmentally friendly fuel to power vehicles, electric devices, and spacecraft with water vapor as the only emission. One associated challenge is the development of safe hydrogen storage systems. Hydrogen tanks and other hydrogen infrastructure elements will be exposed to both high-pressure hydrogen and cyclic stresses. In our work, 304 stainless steel specimens were precharged with hydrogen and subjected to rotational bending fatigue with a maximum stress amplitude of 90 ksi. A diffusion model was solved to approximate the concentration of hydrogen in the specimen at the time of the test. Contrary to our previous work with simple bending fatigue tests, hydrogen precharging actually increased rotational bending fatigue life from 28,074 (Sx = 7,430, N = 103) cycles to 91,513 (Sx = 40,209, N=32) cycles, a factor of approximately 3.25. This result demonstrates that the effect of hydrogen on fatigue life can be highly situational, and great care should be taken when designing systems that will be exposed to high-pressure hydrogen under fatigue conditions.

Keywords

fatigueHembrittlement
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1545: Symposium K – Materials for Sustainable Development , 2013 , mrss13-1545-k03-18
Copyright
Copyright © Materials Research Society 2013 

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References

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