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在研究金属相变时,金相观察是最为直接的方法,但是由于受光学显微镜分辨率和放大倍率的限制,不能对0.2微米以下的微细结构进行观察,因此也就无法研究相变中最关键的成核及其早期长大过程。
Metallographic observation is the most straightforward way to study metal phase transitions. However, microstructures below 0.2 microns can not be observed due to the limitation of optical microscope resolution and magnification, so the most critical phase transition can not be studied The nucleation and early growth process.