工艺条件对铝基合金成分均匀及相析出行为影响-材料加工工程专业论文.docxVIP

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工艺条件对铝基合金成分均匀及相析出行为影响-材料加工工程专业论文.docx

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工艺条件对铝基合金成分均匀及相析出行为影响-材料加工工程专业论文

西安西安建筑科技大学硕士论文西安西安建筑科技大学硕士论文 Effect of Process Conditions on HYPERLINK /dict_result.aspx?searchword=%e7%bb%84%e7%bb%87amp;tjType=sentenceamp;style=B022amp;t=microstructure Composition Uniformity and Precipitation Behavior of HYPERLINK /dict_result.aspx?searchword=%e9%93%9d%e9%94%82%e5%90%88%e9%87%91amp;tjType=sentenceamp;styleamp;t=aluminum-lithium%2Balloy aluminum alloy Specialty： Materials Processing Engineering Name： xue zeng Instructor：Professor Ma You Ping Abstract HYPERLINK /dict_result.aspx?searchword=%e9%93%9d%e9%94%82%e5%90%88%e9%87%91amp;tjType=sentenceamp;styleamp;t=aluminum-lithium%2Balloy Aluminum alloys are widely used with high strength、hardness、handling ease、 corrosion resistance and toughness in aerospace field. However, there are element segregation between grain and grain during the solidification. Inhomogeneity of composition and microstructure will affect the properties of alloys.Temperature field in the process of solidification of aluminum alloy was changed by insert precast alloy rod in liquid metal in this paper. The characteristics and change of microstructure of cast ingot pre-and post temperature change were deeply analysis. The reason for the change of microstructure was discussed. The content of HYPERLINK /dict_result.aspx?searchword=%e6%9e%90%e5%87%ba%e7%9b%b8amp;tjType=sentenceamp;styleamp;t=precipitated%2Bphase precipitated phase in different parts of cast ingot pre-and post temperature change was calculated. The reason for the change also be discussed. The characteristics and change of microstructure of cast ingot pre-and post temperature change after heat treatment were deeply analysis. The result show that： Before the temperature change: ingot microstructure of Al-5%Cu alloy consisted of three part: fine grain region、 HYPERLINK /dict_result.aspx?searchword=%e6%9f%b1%e7%8a%b6%e6%99%b6amp;tjType=sentenceamp;styleamp;t=columnar%2Bcrystal columnar grain region and equiaxed grain region . After the temperature change: