In situ Monitoring of the Oxidation of Coated and Uncoated Austenitic Stainless Steels at Temperatures Lower than 600 °C: Part A—Coating Screening

Abstract In this study, a simple screening technique using an in-situ small-punch (SP) test and based on the hydrogen embrittlement (HE) sensitivity of austenitic stainless steels was developed for use in hydrogen energy facilities. To investigate the HE behaviors of metallic materials, the in-situ SP tests were carried out under high-pressure hydrogen gas environments. The reductions of thickness at the fractured parts of the specimen were measured. The relative reductions of thickness (RRT) were determined after conducting SP tests in both hydrogen and inert gas environments. Similar to the relative reduction of area (RRA) obtained using the slow strain-rate tensile test, RRT obtained using the in-situ SP test is a quantitative measure of the influence of the HE behaviors. The influence of punch velocity on HE sensitivity was examined. The HE behaviors of austenitic steels were evaluated qualitatively and quantitatively. The high-Mn steels were also evaluated because they are candidates for storage and transportation of hydrogen gas. A screening technique for determining the practical environmental conditions at the point of use could be established by confirming the effectiveness of the influencing factor, RRT, using this in-situ SP test method.

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Pitting Resistance and In-situ Raman Study of Nitrogen-Compounds in a Pit of High Nitrogen-Bearing Austenitic Stainless Steels

Zairyo-to-Kankyo ◽

10.3323/jcorr1991.47.584 ◽

1998 ◽

Vol 47 (9) ◽

pp. 584-590 ◽

Cited By ~ 14

Author(s):

Heisuke Ohno ◽

Hiroyoshi Tanabe ◽

Akira Sakai ◽

Toshihei Misawa

Keyword(s):

Stainless Steels ◽

Austenitic Stainless Steels ◽

Nitrogen Compounds ◽

High Nitrogen ◽

In Situ Raman ◽

Raman Study

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Evaluation of Material Compatibility for Hydrogen Applications Using Performance Factors Obtained by In-Situ SP Test

Volume 6: Materials and Fabrication ◽

10.1115/pvp2020-21241 ◽

2020 ◽

Author(s):

Hyung-Seop Shin ◽

Juho Yeo ◽

Nick A. Custodio ◽

Un-Bong Baek ◽

Seung-Hoon Nahm

Keyword(s):

Stainless Steels ◽

Austenitic Stainless Steels ◽

Hydrogen Gas ◽

Test Method ◽

Relative Reduction ◽

Metallic Materials ◽

Performance Factors ◽

Punch Velocity ◽

Reduction Of Area

Abstract Recently, a simple screening technique based on the quantitative evaluation of the hydrogen embrittlement (HE) sensitivity of the metallic materials using an in-situ small-punch (SP) test method was developed by the author group. The in-situ SP test can be easily carried out even under a high-pressure hydrogen gas environment. It makes possible to investigate the HE behaviors of metallic materials quantitatively adopting as a characterizing performance factor of the relative reduction of thickness (RRT) measured at the fractured parts of specimen after SP tests. In this paper, the application of the newly established in-situ SP test method for the hydrogen compatibility screening of austenitic stainless steels was performed at room and low temperatures. The influence of punch velocity on RRT of the HE sensitivity was examined for various austenitic stainless steels. Their HE sensitivities were evaluated quantitatively using RRT and checked by comparing to a factor, the relative reduction of area (RRA) obtained by SSRT tests.

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