计算机模拟Al-Li二元合金中δ′(Al3Li)沉淀相的时效组织演变

1.北京航空材料研究院先进复合材料国防科技重点实验室,北京,100095;西北工业大学材料科学与工程学院,陕西西安,710072

2.西北工业大学材料科学与工程学院,陕西西安,710072

3.西北工业大学材料科学与工程学院,陕西西安,710072

基金项目: 国家自然科学基金(59871039)

Computer Simulation of Aging Structural Evolution of δ′(Al3Li) Precipitates in Al-Li Alloys

利用离散格点模型,通过计算机模拟Al-Li二元合金中δ′沉淀相的时效组织演变,并进行热力学分析,发现,当CLi=0.12(CLi为Li的浓度)时,δ′相沉淀通过形核长大机制进行,未发现协同有序化过程,随着浓度的增加,沉淀相的连接和相遇更加频繁,δ′相越来越偏离球状.

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