발간논문

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Vol.14, No.4, 389 ~ 401, 1976
Title
The Effect of Iron Addition on the Microstructures and Mechanical Properties of Cu - 11.owt % Al Alloy .
염국선Kook Sun Yeum, 천성순Soung Soon Chun
Abstract
The effect of iron addition to Cu-11.0 wt.% Al alloy on the mechanical properties and microstructures has been investigated by using isothermal transformation technique. This investigation showed that the addition of 2% iron to Cu-11.0 wt.% Al alloy produced fine microstructures, and fine iron-rich precipitate particles were formed within α phase after proper isothermal heat treatments. However, the addition of 1% iron did not have any effect on the microstructures at transformation temperatures of 524℃ and 560℃. The structure of iron-rich precipitate particles is body centered cubic (B.C.C.) with lattice parameter of 2.93 A. 2% iron additions caused increase in ultimate tensile strength(U.T.S.) and little effect on elongation. The specimens of fine microstructures with iron-rich precipitate particles showed large U.T.S., and the maximum value of 110,000 psi was obtained. The high U.T.S. is attributed to the microstructural refinement and iron-rich precipitate particles.
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