A Hot Cracking Initiation Criterion Based on Solidification Liquid Film Characteristic and Microstructure
作者机构：School of Materials Science and EngineeringShenyang University of TechnologyShenyang110870China School of Materials Science and EngineeringNortheastern UniversityShenyang110870China
出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)
年 卷 期：2023年第36卷第11期
页 面：1776-1790页
核心收录：
学科分类：0806[工学-冶金工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0823[工学-交通运输工程]
基 金：the National Natural Science Foundation of China(No.51875365)
主 题：Hot cracking criterion Liquid film characteristic Microstructure Aluminum alloy Multiscale simulation
摘 要：Herein,a hot cracking initiation criterion based on the characteristics of solidification liquid film and the microstructure was proposed,which integrated both the mechanical and non-mechanical factors during *** criterion also took the effect of the shrinkage volume of the solid-liquid two-phase in the mushy zone,the flow behavior of the liquid film and the microstructure on the feeding behavior into ***,the effect factors of hot cracking initiation such as alloy composition,microstructure,mold design and process condition were included in this criterion,and it could quantitatively calculate whether hot cracks occurred under a certain state or not during *** criterion was utilized to predict whether hot cracks occurred in Al-4.0 wt%Cu alloy in different initial solidification states or not,which was consistent with the experimental results and verified its *** to the criterion expression,Vfeeding*was related with five effect factors includingη,ΔP*,l*,r*and n,in which r*and n were in positive correlation with Vfeeding*whileη,ΔP*and l*were in negative correlation with that,which provided a good instructive significance for mold design,process optimization and composition and microstructure regulation of alloys and simultaneously further enriched the mechanism and influencing factors of hot cracking ***,a multiscale simulation method for calculating the characteristic parameters of hot tearing behavior during solidification was also provided in this study.
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