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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.12
- 수록면
- 5,212 - 5,227 (16page)
- DOI
- 10.1007/s12540-020-00950-z
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초록· 키워드
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The hot deformation behavior of coarse-grained (CG), ultrafine-grained (UFG), and oxide dispersion-strengthened (ODS)AA6063 is experimentally recognized though carrying out compression tests at different temperatures (300?450 °C) andstrain rates (0.01?1 s?1). Microstructural studies conducted by TEM and EBSD indicate that dynamic softening mechanismsincluding dynamic recovery and dynamic recrystallization become operative in all the investigated materials depending on theregime of deformation. Moreover, the high temperature flow behavior is considerably influenced by the initial grain structureand the presence of reinforcement particles. The constitutive and artificial neural network (ANN) models were used to studythe high-temperature flow behavior of the investigated alloys. To establish an accurate ANN model, material characteristicsalong with the processing parameters are deliberated. An Arrhenius type constitutive model with a strain-compensation termis employed to predict the flow stress of AA6063 alloys. The relative error associated with the constitutive and ANN modelsin the prediction of the flow stress is obtained 9.56% and 2.02%, respectively. The analysis indicates that the developed ANNmodel is more accurate in the prediction of flow stress with at least 78% less error in comparison to the constitutive model.
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