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Enhanced superplasticity in equal-channel angularly pressed Sn-5Sb alloy

机译:等通道角压Sn-5Sb合金的超塑性增强

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摘要

The superplasticity of a fine-grained Sn-5 wt.% Sb alloy, processed by equal-channel angular pressing (ECAP), was investigated by impression testing in the temperature range of 298-370 K. The deformation response of the ECAPed material with a grain size of 2.5 μm conforms to regions I, II and III, typical of superplastic behavior. In region II, the strain rate sensitivity indices of 0.42-0.60 and activation energy of 42 kJ mol~(-1) are indicative of a superplastic deformation behavior dominated by grain boundary sliding.
机译:通过在298-370 K的温度范围内进行模压测试,研究了等通道角压(ECAP)处理的细晶粒Sn-5 wt%Sb合金的超塑性。 2.5微米的晶粒尺寸符合超塑性行为的典型区域I,II和III。在区域Ⅱ中,应变速率敏感性指数为0.42-0.60,活化能为42 kJ mol〜(-1),表明以晶界滑动为主的超塑性变形行为。

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