Predicting the effect of cooling rates and initial hydrogen concentrations on porosity formation in Al-Si castings
作者机构：School of Materials Science and EngineeringBeijing Institute of TechnologyBeijingChina Advanced Research Institute of Multidisciplinary ScienceBeijing Institute of TechnologyBeijingChina School of Mechanical EngineeringBeijing Institute of TechnologyBeijingChina CITIC Dicastal Co.Ltd.QinhuangdaoHebei ProvinceChina
出 版 物：《Materials Genome Engineering Advances》 (材料基因工程前沿（英文）)
年 卷 期：2024年第2卷第3期
页 面：117-129页
学科分类：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）]
基 金：supported by the National Natural Science Foundation of China(grant number 52073030) the National Natural Science Foundation of China-Guangxi Joint Fund(U20A20276)
主 题：Al-Si alloy cellular automata cooling rate microporosity secondary dendrite arm spacing solidification
摘 要：Al-Si alloys are widely used in automotive casting components while microporosity has always been a detrimental defect that leads to property *** this study,a coupled three-dimensional cellular automata(CA)model has been used to predict the hydrogen porosity as functions of cooling rate and initial hydrogen *** quantifying the pore characteristics,it has been found that the average equivalent pore diameter decreases from 40.43 to 23.98μm and the pore number density increases from 10.3 to 26.6 mm^(−3)as the cooling rate changes from 2.6 to 19.4℃/s at the initial hydrogen concentration of 0.25 mL/100 *** is also notable that the pore size increases as the initial hydrogen concentration changes from 0.15 to 0.25 mL/100 g while the pore number remains *** addition,the linear regression between secondary dendrite arm spacing and the equivalent pore diameter has been studied for the first time,matching well with *** work exhibits the application of CA model in future process optimization and robust condition design for advanced automotive parts made of Al-Si alloys.
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