Optimizing Homogenization Heat Treatment of Al-Zn-Mg-Cu-Zr-0.15Er Alloy
作者： Yue Qi Wang , Hui Huang , Sheng Ping Wen , Kun Yuan Gao , Yue Wang
DOI: 10.4028/WWW.SCIENTIFIC.NET/MSF.817.399
关键词: Differential scanning calorimetry 、 Scanning electron microscope 、 Alloy 、 Grain boundary 、 Analytical chemistry 、 Materials science 、 Diffraction 、 Metallurgy 、 Homogenization (chemistry) 、 Microstructure 、 Optical microscope
摘要: The effects of the homogenization conditions on microstructure Al-Zn-Mg-Cu-Zr-0.5Er alloy were investigated by differential scanning calorimetry (DSC), optical microscopy (OM), electron (SEM), energy dispersive spectrometry (EDS), and X-ray diffraction (XRD). results showed that a lot coarse phases existed in as-cast alloy. dissolvable at grain boundary consisted Mg32 (Al, Zn)49. residual dissolved into matrix gradually during with increasing temperature prolonging holding time. When increased to 465°C, time prolongs 24h, main phase disappeared except Fe Er enriched phase, as result its high melting temperature. Taking account precipitation Al3Er, we used two-step .Hence, optimum parameters 400 °C for 4 h 465 24 h, which are good presence coherent, elastically hard nanosized Al3(Er, Zr) particles .
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