Struers Inc., Wadsworth, IL 60083-9293, USA.
Microsc Microanal. 2013 Aug;19(4):1019-26. doi: 10.1017/S1431927613000585. Epub 2013 May 24.
The influence on alloy 413.0 of the refinement and modification of its microstructure was analyzed by means of several microscopy techniques, as well as the effect of the application of high pressure during solidification. For each treatment and solidification pressure condition employed, the most suitable microscopy techniques for identifying and characterizing the phases present were investigated. Color metallography and electron microscopy techniques were applied to the qualitative microstructural analysis. Volume fraction and grain size of the primary α-Al were characterized by quantitative metallographic techniques. The results show that the effect caused by applying high pressure during solidification of the alloy is more pronounced than that caused by modification and refinement of the microstructure when it solidifies at atmospheric pressure. Furthermore, it has been shown that, for Al-Si alloy characterization, when aiming to characterize the primary α-Al phase, optical color metallography observed under crossed polarized light plus a sensitive tint filter is the most suitable technique. When the goal is to characterize the eutectic Si, the use of optical color metallography or electron microscopy is equally valid. The characterization of iron-rich intermetallic compounds should preferably be performed by means of backscattered electron imaging.
采用多种显微镜技术分析了合金 413.0 的微观结构细化和改性对其的影响，以及在凝固过程中施加高压的影响。对于每种处理和凝固压力条件，都研究了最适合用于识别和表征存在的相的显微镜技术。彩色金相学和电子显微镜技术用于定性微观结构分析。通过定量金相技术来表征初生α-Al 的体积分数和晶粒尺寸。结果表明，与在常压下凝固时通过细化和改性微观结构引起的影响相比，在凝固过程中施加高压引起的影响更为明显。此外，已经表明，对于 Al-Si 合金的表征，当旨在表征初生α-Al 相时，在正交偏振光下观察加灵敏补色滤光片的光学彩色金相学是最合适的技术。当目标是表征共晶硅时，使用光学彩色金相学或电子显微镜同样有效。富铁金属间化合物的表征最好通过背散射电子成像进行。
