발간논문

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Vol.22, No.4, 370 ~ 379, 1984
Title
The Effects of the Third Alloying Component Mn on the Mechanical Properties of the Rapidly solidified A - Cr Alloy
강형Hyung Kang, 김동훈Tong Hoon Kim
Abstract
A study has been made of solid solubility of chromium in aluminium, variation of hardness with chromium contents and thermal stability in the Al-Cr alloy produced by the Atomization-Splat Quenching method and of the effects of manganese up to 1.6% on the properties mentioned above of the Al-4.5 Cr-Mn alloy. At the cooling rate of 10^5-10^6 K˚/sec. the solubility of chromium was extended to above 5.5% for the Al-Cr system. The hardness of the Al-Cr alloy increased linearly with chromium contents, an empirical equation of which may be expressed as Hv＝36.2＋12.5 Cr (%) and that of the Al-4.5Cr-Mn alloy also increased linearly with manganese contents. The average thermal stability of the Al-Cr alloys was estimated to be 0.65. And the manganese addition lowered the decomposition-start temperature of the solid solution, but didn`t affect the thermal stability of the Al-Cr alloy.
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