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Vol.38, No.3, 427 ~ 434, 2000

Title

Pesearch Paper / Mechanical Behavior : Hot Deformation Behaviors of Cu-6Ni-2Sn and Cu-6Ni-2Sn-0.6Si-0.6Zn Alloys

이정무Jung Moo Lee,이종환Jong Hwan Lee,한승전Seung Zeon Han,정윤철Yun Chul Jung,김창주Chang Joo Kim

Abstract

The high temperature deformation behaviors of Cu-6 wt.%Ni-2 wt.%Sn and Cu-6 wt.%Ni-2 wt.%Sn-0.6 wt.%Si-0.6 wt.%Zn alloys were investigated in the temperature range of 550-900℃ at strain rates between 0.05-1.5s^(-1) by hot compression test. Flow curves were analysed by hyperbolic sine relationship and the activation energy of deformation was determined at high and low temperature ranges. The activation energy of deformation for Cu-6 wt.%Ni-2 wt.%Sn alloy exhibits almost the same as that for Cu-6 wt.%Ni-2 wt.%Sn-0.6 wt.%Si-0.6 wt.%Zn alloy in the low temperature range below 700℃. While, in the high temperature range above 700℃ the activation energy of deformation for Cu-6 wt.%Ni-2 wt.%Sn alloy exhibits much higher value than that for Cu-6 wt.%Ni-2 wt.%Sn-0.6 wt.%Si-0.6 wt.%Zn alloy. The difference of the activation energy of deformation was attributed to the presence of Sn-rich inclusion in the matrix.

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