SEDL / STP / STP672-EB / STP36880S

Influence of Hydrogen on Age-Hardening Processes in 15-5 Precipitation Hardened Stainless Steel

Murali, J
Graduate research assistant; professor, Materials Engineering; and professor, Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, Va.

Louthan, MR
Graduate research assistant; professor, Materials Engineering; and professor, Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, Va.

McNitt, RP
Graduate research assistant; professor, Materials Engineering; and professor, Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, Va.

Pages: 11    Published: Jan 1979

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Abstract

The aging characteristics of 15-5 precipitation hardened stainless steel were altered when age-hardening took place in a hydrogen environment. The presence of hydrogen increased the peak hardness and decreased the time to achieve peak hardness. Furthermore, the hardness of the hydrogen-aged samples increased to a maximum value with time of storage at room temperature. These observations are discussed in terms of proposed mechanisms for hydrogen embrittlement.