발간논문

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Vol.34, No.5, 552 ~ 560, 1996
Title
Research Paper - Transformations - : Analysis of Precipitation Behavior of Al - Li - Cu - Mg - Ag - Zr Alloy Using Transmission Electron Microscopy
이갑호Kap Ho Lee, 조성길Seong Gill Cho, 이승원Seoung Won Lee, 이응조Yeung Jo Lee
Abstract
The present work has studied the behavior of precipitation during aging process of a Weldalite 049 alloy using high resolution electron microscopy and in-situ hot-stage microscopy. The results show that the quenched specimen is observed the site of few nm G.P.I and Ll₂type of β phase, T₁ and θ` phases are precipitated from subgrain boundary in the in-situ experimental work and the S` phase is nucleated from the Cu and Mg clusters. It has been suggested that it is necessary to characterize the microstructures of alloys and particularly the local structures such as the interface, lattice defects and lattice mismatch to control the precipitation behavior. The high resolution electron microscopy technique has a great advantage in characterizing the local structure on the atomic-scale.
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