발간논문

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Vol.31, No.2, 169 ~ 177, 1993
Title
Hot Deformation Behavior and Deformed Microstructures of Al - ( 0.6 , 1.3 ) wt% Fe Alloys
전정식Jeong Sic Jeon, 한형기Hyoung Ki Han, 이호인Ho In Lee, 유연철Yeon Chul Yoo
Abstract
High temperature dynamic softening characteristics related to microstructures have been examined for Al-(0.6, 1.3)wt%Fe alloys deformed in torsion at temperatures between 300℃ and 500℃, and at strain rates of 2.65×10^(-2)/sec to 1.2/sec. The flow stress as a function of strain rose to a maximum value then gradually decreased towards a steady state deformation. The effect of temperature on the flow stress was more pronounce than that of strain rate in this experimental range. The high temperature restoration mechanism was found to be dynamic recrystallization(DRX). From the relations between flow stresses and microstructures including intermetallic compounds at specific points on a flow curve, it can be assumed that the intermetallic compounds promoted dynamic recrystallization and prohibited grains from growing during the high temperature deformation. The relation between Zenner-Hollomon parameter, Z, and the microstructure was also studied and the equiaxied DRX grains were shown at low value of Z range.
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