2상 스테인리스강(STS 329J1)의 크리프 특성 = Creep Behaviours of Duplex Stainless Steel

다국어 초록 (Multilingual Abstract)

Micro duplex stainless steel is used to denote a fine scale two-phase micro structure consisting austenite and ferrite. The development of this structure was done by proper thermo-mechanical processing. The objective of present investigation is to study creep characteristics of this alloy. Since we have little design data about the crap behaviors of the alloy. An apparatus has been designed and built for conducting creep tests under constant load conditions. A series of creep tests on them have been performed to get the basic design data and life prediction of micro duplex stainless steel products and we have gotten the following results. First, the stress exponents decrease as the test temperatures increase. Secondly, the creep activation energy gradually decreases as the stresses become higher. Thirdly, the constant of Larson-Miller parameters on this alloy is estimated as about 5. Last, the fractographs at the creep rupture show both the ductile and brittle fracture modes according to the creep conditions.

참고문헌 (Reference)

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