Proceedings of the KWS Conference (대한용접접합학회:학술대회논문집)
- 2002.10a
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- Pages.570-576
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- 2002
LASER SURFACE ANNEALING FOR IMPROVING HYDROGEN EMBRlTTLEMENT RESISTANCE OF AGED INCONEL 718: EVALUATION OF THE EFFECTS OF PRECIPITATES
- Liu, Liufa (Department of Manufacturing Science, Graduate School of Engineering, Osaka University) ;
- Tanaka, Katsumi (Department of Manufacturing Science, Graduate School of Engineering, Osaka University) ;
- Hirose, Akio (Department of Manufacturing Science, Graduate School of Engineering, Osaka University) ;
- Kobayashi, Kojiro F. (Department of Manufacturing Science, Graduate School of Engineering, Osaka University)
- Published : 2002.10.01
Abstract
Application of the aged Inconel 718 in hydrogen environment is seriously restraint by its high hydrogen embrittlement (HE) sensitivity. m previous researches, we have suggested the possibility and applicability of the laser surface annealing (LSA) process in improving the HE resistance of this alloy. Sequentially, a study on the effects of the precipitates in the Inconel 718 on its HE sensitivity was conducted in this research. Firstly, flat bar specimens were heat-treated to obtain various kinds of precipitation microstructures concerning the