28 June 2015 to 2 July 2015
JW Marriott Starr Pass Resort
Etc/GMT-7 timezone

Hydrogen Environment Embrittlement on Austenitic Stainless Steels from Room Temperature to Low Temperatures

30 Jun 2015, 17:15
15m
Tucson Ballroom CD ()

Tucson Ballroom CD

Contributed Oral Presentation ICMC-11 - Metallic and Composite Materials M2OrD - Cryogenic Materials V: Structural Materials

Speaker

Toshio OGATA (National Institute for Materials Science)

Description

Hydrogen environment embrittlement (HEE) on austenitic stainless steels SUS304, 304L, and 316L in the high pressure hydrogen gas was evaluated from ambient temperature to 20 K using a very simple mechanical properties testing procedure. In the method, the high-pressure hydrogen environment is produced just inside the hole in the specimen and the specimen is cooled in a cooled-alcohol dewar and a cryostat with a GM refrigerator. The effect of HEE was observed in tensile properties, especially at lower temperatures, and fatigue properties at higher stress level but almost no effect around the stress level of yield strength where almost no strain-induced martensite was produced. So, no effect of HEE on austenitic stainless steels unless the amount of the ferrite phase is small.

Primary author

Toshio OGATA (National Institute for Materials Science)

Presentation Materials

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