Method of judging hydrogen embrittlement cracking of...

Details Method of judging hydrogen embrittlement cracking of... Method of judging hydrogen embrittlement cracking of...

2006-04-25

2006-04-25

Bui, Bryan (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Quality evaluation

C702S081000

Reexamination Certificate

active

07035746

ABSTRACT:
Using information about the position, orientation, and shape of a crack appeared in a judged material and information about the structure of the judged material as parameters, the stress intensity factor KIof the crack is found. Based on the stress intensity factor KI, hydrogen embrittlement cracking of the judged material is judged. The crack growth rate and possibility of brittle fracture can be judged by comparing the stress intensity factor KIwith the critical stress intensity factor KIHfor crack initiation or the critical stress intensity factor KIC-Hfor brittle fracture about the temper embrittled steel which absorbs approximately 2.0 ppm hydrogen.

REFERENCES:
patent: 5700120 (1997-12-01), Manning et al.
patent: 6213884 (2001-04-01), McCarty

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