MEMS-Based in situ electron-microscopy investigation of rapid solidification and heat treatment on eutectic Al-Cu
Acta Materialia(2022)
摘要
The solidification behavior of a eutectic AlCu specimen is investigated via in situ scanning transmission electron microscope (STEM) experiments. Solidification conditions are varied by imposing various cooling conditions via a micro-electro-mechanical system (MEMS) based membrane. The methodology allows the use of material processed by a melting and casting route close to industrial metallurgically fabricated material for in situ STEM solidification studies. Different rapid solidification morphologies could be obtained solely on a single specimen by the demonstrated strategy. Additional post-solidification heat treatments are investigated in terms of observation of spheroidization of lamellas during annealing at elevated temperatures.
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关键词
Material science,Scanning transmission electron microscopy,STEM,Metals,Alloys,Rapid solidification,Solidification,Eutectic,Recrystallization,Interface energy,Grain boundary
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