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Quenching과정에서 상변태를 고려한 탄소성 열응력의 유한요소 해석 (2) - 오오스테나이트에서 마르텐사이트로의 변태 -
김옥삼,송관흠,구본권 ( O . S . Kim,G . H . Song,B . K . Koo ) 한국열처리공학회 1995 熱處理工學會誌 Vol.8 No.1
In this a set of constitutive equation relevant to the analysis of thermo-elasto-plastic materials with phase transformation during quenching process was presented on the basis of continuum thermodynamic. In calculating the transient thermal stresses, temperature between coolant and specimen(SM45C) surface was determined from the heat transfer coefficient. A calculation was made for specimen with 40㎜ in diameter quenched in coolant from 820℃ and the results are as follow. Stresses at starting point of transformation always show the maximum tensile value. Reverse of stresses takes place after completion of transformation of inner part at specimen.