Al356.1工业铝合金凝固过程中微观组织演变的相场模拟

来源 :第十六届全国相图学术会议暨相图与材料设计国际研讨会 | 被引量 : 0次 | 上传用户：javajnihook

【摘要】

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【作者】

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孙伟华张利军杜勇

【机构】

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中南大学粉末冶金国家重点实验室;中德铝合金微结构联合实验室(中德科学中心),长沙410083 IC

【出处】

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第十六届全国相图学术会议暨相图与材料设计国际研讨会

【发表日期】

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2012年10期

【关键词】

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Al356.1合金多相相场方法显微偏析 Scheil模型

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　　基于多元Al基合金热力学及扩散动力学数据库,采用相场方法对工业铝合金Al356.1(91.95Al-0.46Fe-0.3Mg-0.32 Mn-6.97Si,in wt.％)的凝固过程中微观组织演变进行了定量相场模拟.凝固速率为2K/S.模拟所需的界面能和界面能各向异性信息均取自文献报道的实验值,而界面移动性参数则调节在扩散控制的范围内.本工作模拟的Al356.1合金凝固序列为：liquid(→)初晶相(Al)(→)化合物(α-AlMnSi,β-AlFeSi,Mg2Si)(→)(Al)和(Si)共晶组织,这与Scheil模型模拟的结果一致.本工作模拟得到的Al356.1合金凝固组织形貌与实验结果吻合较好,并定量得到了(Al)相中的合金化元素的成分偏析.

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Al356.1工业铝合金凝固过程中微观组织演变的相场模拟

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