Effect of Zn/Mg/Cu Additions on Hot Cracking Tendency and Performances of Al-Cu-Mg-Zn Alloys for Liquid Forging
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2020年第1期
论文作者：孙永根 杜之明 SU Yanni CHENG Yuansheng LIU Yongwang
文章页码：176 - 182
摘 要：During the process of liquid forging, a host of hot cracking defects were found in the Al-CuMg-Zn aluminum alloy. Therefore, mechanical tests and analyses by optical microscope, scanning electron microscope, and X-ray diffraction were performed to research the influences of zinc, magnesium, and copper（three main alloying elements） on hot cracking tendency and mechanical properties. It was concluded that all the three alloying elements exerted different effects on the performances of newly designed alloys. And the impact of microstructures on properties of alloys was stronger than that of solution strengthening. Among new alloys, Al-5 Cu-4.5 Mg-2.5 Zn alloy shows better properties as follows: σb=327 MPa, δ=2.7%, HB=107 N/mm2, and HCS=40.
孙永根1，杜之明1，SU Yanni2，CHENG Yuansheng2，LIU Yongwang2
1. National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology2. School of Materials Science and Engineering, Harbin Institute of Technology
摘 要：During the process of liquid forging, a host of hot cracking defects were found in the Al-CuMg-Zn aluminum alloy. Therefore, mechanical tests and analyses by optical microscope, scanning electron microscope, and X-ray diffraction were performed to research the influences of zinc, magnesium, and copper（three main alloying elements） on hot cracking tendency and mechanical properties. It was concluded that all the three alloying elements exerted different effects on the performances of newly designed alloys. And the impact of microstructures on properties of alloys was stronger than that of solution strengthening. Among new alloys, Al-5 Cu-4.5 Mg-2.5 Zn alloy shows better properties as follows: σb=327 MPa, δ=2.7%, HB=107 N/mm2, and HCS=40.
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