| 一种合金枝晶凝固微观溶质再分布统一模型 |
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| 引用本文： | 徐达鸣,傅恒志,郭景杰,贾钧,李庆春.一种合金枝晶凝固微观溶质再分布统一模型[J].哈尔滨建筑大学学报,2003(10). |
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| 作者姓名： | 徐达鸣 傅恒志 郭景杰 贾钧 李庆春 |
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| 作者单位： | 哈尔滨工业大学材料科学与工程学院，哈尔滨工业大学材料科学与工程学院，哈尔滨工业大学材料科学与工程学院，哈尔滨工业大学材料科学与工程学院，哈尔滨工业大学材料科学与工程学院 黑龙江 哈尔滨150001，黑龙江 哈尔滨150001，黑龙江 哈尔滨150001，黑龙江 哈尔滨150001，黑龙江 哈尔滨150001 |
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| 基金项目： | 国家自然科学基金重大(50291012)，国防科技重点实验室基金(97JS61.1.1.ZS6101) |
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| 摘 要： | 简要概述了合金枝晶凝固微观偏析解析模型化研究进展。基于对具有任意枝晶形貌及任意固相反扩散(SBD)效应的合金凝固过程中微观/宏观溶质传输行为模型化,提出了微观溶质再分布新模型,并进行了不同凝固速率、不同枝晶形貌及SBD效应的Al-4.5％Cu合金与Fe-0.5％C基碳素钢枝晶凝固的模型对比计算。研究表明,所建模型具有包含多种影响因素与统一性的特点,以及模型计算的可行性与有效性。
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| 关 键 词： | 凝固模型 溶质再分布 固相反扩散 枝晶形貌 |
A unified model for micro-scale solute redistribution in dendrite solidification of alloys |
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| XU Da-ming,FU Heng-zhi,GUO Jing-jie,JIA Jun,LI Qing-chun,School of Materials Science and Engineering,Harbin Institute of Technology,Harbin ,China,E-mail:damingxu@hit.edu.cn.A unified model for micro-scale solute redistribution in dendrite solidification of alloys[J].Journal of Harbin University of Civil Engineering and Architecture,2003(10). |
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| Authors: | XU Da-ming FU Heng-zhi GUO Jing-jie JIA Jun LI Qing-chun School of Materials Science and Engineering Harbin Institute of Technology Harbin China E-mail:damingxu@hiteducn |
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| Affiliation: | XU Da-ming,FU Heng-zhi,GUO Jing-jie,JIA Jun,LI Qing-chun,School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China,E-mail:damingxu@hit.edu.cn |
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| Abstract: | Based on a brief review on the research progress in analytical microsegregation modeling for dendrit- ic alloy solidification, a new micro-scale solute redistribution model has been established from a recent micro/ macrosegregation modeling on alloy solidification with more realistic dendrite morphologies and any solid-back diffusion (SBD) effects. Through comparison among the existing analytical expressions for the microsegrega- tion, as well as the sample computations for dendritic solidification of Al-4.5% Cu alloy and a Fe-0.5% C- based steel with different dendrite morphologies and SBD effects at different solidification rates, the new fea- tures and unity of the model, and the feasibility and effectiveness of the model computations, are demonstra- ted. |
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| Keywords: | solidification model solute redistribution solid-back diffusion dendrite morphology |
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