【摘要】 使用光学显微镜(OM)、X射线衍射仪(XRD)和扫描电镜(SEM),研究了C2Cl6对AZ91镁合金铸态显微组织与力学性能的影响,并利用Imagetool软件测量了晶粒尺寸和晶粒面积。结果表明,少量的C2Cl6(0.3%~0.8%)对α-Mg晶粒有明显地细化作用,平均晶粒尺寸由106μm降至约53μm,晶粒面积也明显减小,C2Cl6的最佳加入量为0.3%。而且,C2Cl6加入导致β-Mg17Al12相弥散细小。此外,显微组织的改善导致合金的力学性能明显提高。更多还原

【Abstract】 Effects of C₂Cl₆ on the as-cast microstructure and mechanical properties of AZ91 magnesium alloy have been investigated by optical microscope （OM）, X-ray diffraction analyzer （XRD） and scanning electron microscope （SEM）, and the grain size and grain area have been measured using the Imagetool Software. The results show that 0.3%⁰.8% C₂Cl₆ addition in the AZ91 magnesium alloy can obviously refine the grain average size of α-phase from 106 μm to about 53 μm and decrease the grain area, where the best refined effects can be observed with 0.3% C₂Cl₆ addition. In addition, C₂Cl₆ addition can result in the dispersive distribution of fine β-Mg 17 Al 12 phase, which can greatly improve the mechanical properties of the alloy.更多还原