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首页> 外文期刊>Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science >Effects of Melt-to-Solid Volume Ratio and Pouring Temperature on Microstructures and Mechanical Properties of Cu/Al Bimetals in Compound Casting Process
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Effects of Melt-to-Solid Volume Ratio and Pouring Temperature on Microstructures and Mechanical Properties of Cu/Al Bimetals in Compound Casting Process

机译：熔融对固体体积比和浇注温度对复合铸造工艺中Cu / Al双核的微观结构和力学性能的影响

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摘要

Cu/Al bimetallic composites were fabricated by compound casting where aluminum melts were cast on Ni-coated Cu substrates. Effects of the melt-to-solid volume ratio (VR) and the pouring temperature on interfacial microstructures and mechanical properties of Cu/Al bimetals were investigated systematically. Results show that a continuous and compact interface can be formed when the pouring temperature exceeds 953 K (680 degrees C). When the VR or pouring temperature increases, the solidification time of (Al) increases, resulting in an increase in the dissolution content of Cu substrate. The transition zone consists of (Al)+Al2Cu eutectic layer and intermetallic compounds (IMCs) layer, and the IMCs are identified as Al2Cu, AlCu, and Al4Cu9. Ni coating participates in the formation of AlCuNi phase between the Al2Cu layer and AlCu layer when the pouring temperature is 973K (700 degrees C). The presence/absence of Ni-containing phase has a close relationship with the dissolution of the Cu substrate. Shear-strength tests show that shear fracture mainly occurs at the hard brittle IMCs layer, and the highest shear strength of 36.01 MPa is obtained for the samples fabricated at 993 K+VR 49.24 (720 degrees C+VR 49.24).
机译：通过化合物铸件制造Cu / Al双金属复合材料，其中铝熔化在Ni涂覆的Cu基材上浇铸。系统地研究了熔融 - 固体体积比（VR）和浇注温度对Cu / Al双核的界面微观结构的影响和浇注温度。结果表明，当浇注温度超过953 k时，可以形成连续和紧凑的界面（680℃）。当VR或浇注温度升高时，（A1）的凝固时间增加，导致Cu基质的溶解含量增加。过渡区由（Al）+ Al2Cu共晶层和金属间化合物（IMCs）层组成，并且IMC被鉴定为Al2Cu，Alcu和Al4Cu9。当浇注温度为973K（700℃）时，Ni涂层参与Al2Cu层和Alcu层之间的Alcuni相。含Ni的相的存在/不存在与Cu基质的溶解具有紧密的关系。剪切强度试验表明，剪切断裂主要发生在硬脆性IMC层中，并获得36.01MPa的最高剪切强度，用于993 k + VR 49.24（720℃+ VR 49.24）制备的样品。

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    Liu Guoping; Wang Qudong; Zhang Li; Ye Bing; Jiang Haiyan; Ding Wenjiang;

  • 作者单位

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn Natl Engn Res Ctr Light Alloy Net Forming Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn Natl Engn Res Ctr Light Alloy Net Forming Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn Natl Engn Res Ctr Light Alloy Net Forming Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn Natl Engn Res Ctr Light Alloy Net Forming Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn Natl Engn Res Ctr Light Alloy Net Forming Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Mat Sci &

    Engn Natl Engn Res Ctr Light Alloy Net Forming Shanghai 200240 Peoples R China;

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  • 正文语种 eng
  • 中图分类 冶金技术;
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