The Microstructural Evolution of AA6111 Aluminum Alloy during Homogenization Treatment

摘要：

　　The microstructures of AA6111 automotive aluminum alloy were investigated by optical microscopy(OM),scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX),differential scanning calorimetry (DSC),X-ray diffraction analysis (XRD) and transmission electron microscope(TEM).The results indicated that as-cast AA6111 alloy has a complex microstructure.There were many kinds of intermetallic phases,such as lath-shaped β-Al5FeSi,Al15(FeMn)3Si2 and Mg2Si on the grain boundaries.The Al5Cu2Mg8Si6 precipitates presented non-equilibrium eutectic morphology in the grain interiors.After homogenization treatment(6h at 470℃),the low melting point Mg2Si phase began dissolving.The eutectic Al5Cu2Mg8Si6 phase were dissolved completely after 530℃/24h homogenization treatment.The Al15(FeMn)3Si2 phase started to be spheroidized at 560℃.Increasing treatment temperature will promote Mn to substitute for Fe in this phase.

关键词： 6111 aluminum alloy Microstructure Homogenization treatment

作者: Shijiao Zhang Baiqing Xiong Yongan Zhang Xiwu Li Feng Wang Zhihui Li Hongwei Liu

作者单位: State Key Laboratory of Nonferrous Metals and Processes, General Research Institute for Nonferrous Metals, Beijing 10088, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 223-228

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）