Session: MF-02-06 Materials for Hydrogen Service-Test Methods 1

Paper Number: 123160

123160 - Effect of Test Method and Test Condition on Fracture Toughness of Cr-Mo Steels Under High-Pressure Hydrogen Gas 

Nowadays, interest and demand for hydrogen energy are increasing. In order to achieve a hydrogen society, it is more important than anything to build safe hydrogen-related infrastructure. High-pressure hydrogen is mainly stored in static tube trailers made of Cr-Mo steel. In order to prevent a sudden explosion caused by high-pressure gas, the fracture toughness of the material must be carefully measured and designed accordingly. In particular, in a high-pressure hydrogen environment, the fracture toughness of the material is different from the fracture toughness in air, so accurate measurement is necessary. Methods for measuring the fracture toughness of Cr-Mo steel include the CTOD test, J1C test, step-wise load incrementing test, and continuous load increasing method.

In this study, we sought to determine the extent to which differences in fracture toughness occur depending on these test methods and test conditions. In order to measure effective fracture toughness, the conditions according to the test standard must be satisfied. However, because it is difficult to satisfy all of these conditions in a high-pressure hydrogen environment, each research group uses slightly different test conditions. The purpose of this study was to determine the differences in fracture toughness according to each test method and to determine which test method and under what test conditions fracture toughness is evaluated most conservatively.

Presenting Author: Jaeyeong Park Korea Research Institute of Standards and Science

Presenting Author Biography: 2013-2018
: Pohang University of Science and Technology (Ph.D student)

2018~
:Korea Research Institute of Standards and Science (Junior Researcher)

Authors:

Jaeyeong Park Korea Research Institute of Standards and Science
Kyung-Oh Bae Korea Research Institute of Standards and Science
Seung Hoon Nahm Korea Research Institute of Standards and Science
Un Bong Baek Korea Research Institute of Standards and Science