Method of determining fatigue crack lifetime in high-pressure hydrogen environment
US9151706B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 2012 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Mar 1, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0232
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a method of determining a fatigue crack lifetime of a low-alloy steel material coming in contact with high-pressure hydrogen in a high-pressure hydrogen environment, estimate a fatigue crack acceleration starting point KmaxT of the low-alloy steel material using a crack-growth threshold stress intensity factor KIH-R obtained through a rising load test on the low-alloy steel material in a high-pressure hydrogen environment. The high-pressure hydrogen environment of the rising load test is a high-pressure hydrogen environment which has the same pressure and atmosphere as in the high-pressure hydrogen environment in which KmaxT is estimated and in which the test temperature tolerance between both environments is ±5° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.