Strengthening in deformation-processed Cu-20% Fe composites
Strengthening in deformation-processed Cu-20% Fe composites
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DOI：
10.1007/bf00576047
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发表时间：
1991
影响因子：
4.5
通讯作者：
Y. Go;W. Spitzig
中科院分区：
文献类型：
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作者：
Y. Go;W. Spitzig
采用粉末冶金工艺制备了3种不同铁粉粒度的Cu-20% Fe复合材料。这些复合材料的强度后，广泛的变形处理杆旋锻和拉丝被证明是远远高于那些预测的规则的混合物方程。然而，强度服从Hall-Petch型关系与铁丝间距。等效变形后，Cu-20% Fe复合材料的强度随初始铁粉粒度的减小而增大。Cu-20%Fe复合材料与类似的Cu-20%Nb复合材料的比较表明，在相同程度的变形处理后，Cu-20%Fe更强。Cu-20%Fe复合材料的强度比Cu-20%Nb复合材料的强度增加，这与铁的剪切模量比铌的剪切模量更大相关，使用硬化屏障模型。
Three Cu-20% Fe composites with different iron powder sizes were fabricated using powder metallurgy processes. The strengths of these composites after extensive deformation processing by rod swaging and wire drawing were shown to be anomalously higher than those predicted by rule of mixtures equations. However, the strengths obey a Hall-Petch type relationship with the iron filament spacings. The strengths of the Cu-20% Fe composites after equivalent deformation processing increased with decreasing initial iron powder size. Comparison of a Cu-20% Fe composite with a similar Cu-20% Nb composite showed that Cu-20% Fe was stronger after an identical degree of deformation processing. This increase in strength of a Cu-20% Fe composite over that of a Cu-20% Nb composite correlated with the greater shear modulus of iron compared to niobium using a barrier model for hardening.