METHODS OF TESTING FOR HYDROGEN EMBRITTLEMENT

The results are presented of a cooperative test program conducted by members of the AIA-ARTC in an attempt to establish a standard test method for hydrogen embrittlement. The six basic methods investigated were the tensile test, stressed ring test, sustained load notched tensile test, constant-rate bend test, torqued bolt test, and static bend test. Modifications of the test specimens and procedures brought the total number of methods investigated to twelve. Conclusions are drawn as to the most accurate methods now available and the direction that further work on hydrogen embrittlement testing should take. Author