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최광,장래웅,엄기원,Choi, K.,Chang, R.W.,Eom, G.W. 대한용접접합학회 1990 대한용접·접합학회지 Vol.8 No.3
Temperature distribution of thick plate during welding was investigated. Applied weldng process was shielded metal arc welding which was known as one of the most utilized processes in fabrication fields. Heating and cooling cycles were recorded by imploying high fidelity recorded and K-type thermocouple of 0.3mm in diameter. Both analytical and numerical calculations were preformed so as to verify the thermal cycle measurement. Results showed that the temperature of a welded points at given time could be predicted by the theoretical calculations. It was considered that methods could be applied to real structural components with slight modification.
吳世旭(Sea-Wook Dh),尹漢基(Han-Ki Yoon),張來雄(Rae-Woong Chang),金伎徹(Ki-Chol Kim) 한국해양공학회 1988 韓國海洋工學會誌 Vol.2 No.1
The dynamic fracture toughness, KId, is measured in the heat-treated and ion-nitrided Cr-Mo, Ni-Cr-Mo steel using standard and Precracked Charpy specimens an instrumented impact machine. The value of KId are determined as a fracture of yield strength and microstructure, and correlations are established between KId and both the energy of initiate fracture, and the total energy of fracture. Since the KId values of the pre cracked impact specimens are in accord with their theoretical ones, this testing method is sufficently practical. The effect of ion-nitriding are found to be larger than the heat-treaded specimen.