Microsegregation Model with Local Equilibrium Partition Coefficients During Solidification of Steels. Issue 7 (20th October 2015)

• Record Type: Journal Article
• Authors: You, Dali; Bernhard, Christian; Wieser, Gerhard; Michelic, Susanne
• Is Part Of: Steel research international. Volume 87:Issue 7(2016)
• Page Start: 840
• Page End: 849
• Publication Date: 2015-10-20
• Subjects: microsegregation -- partition coefficients -- temperatures; Steel -- Periodicals; Steel -- Metallurgy -- Periodicals; 669.142
• DOI: 10.1002/srin.201500216
• Languages: English
• ISSNs: 1611-3683

Abstract

Abstract : A microsegregation model with local partition coefficients and temperature‐dependent diffusion coefficients based on the model of Ohnaka (I. Ohnaka, Trans. Iron Steel Ins. Jpn . 1986, 26, 1045) is proposed. In this model, multicomponent alloy effects and precipitations are considered, and the peritectic reaction can be indicated using the thermodynamic library ChemApp. The proposed model is validated by comparing the results to other models from the literature and to measured data. Local partition coefficients are calculated, and their significant influence on microsegregation prediction is shown. The characteristic temperatures determined using the proposed model are in good agreement with measured values. Abstract : A microsegregation model with local partition coefficients is described . The model is validated by comparing calculations from other models and measured data. The local partition coefficients calculated by the present model are compared with available values from the literature, and their influences on microsegregation are discussed. Different estimations of characteristic temperatures are compared.