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首页> 外文期刊>Materials Science and Engineering >Ultrafine grained Cu-3Ag-xZr (x = 0.5, 1.0 wt%) alloys with high strength and good ductility fabricated through rapid solidification and cryorolling
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Ultrafine grained Cu-3Ag-xZr (x = 0.5, 1.0 wt%) alloys with high strength and good ductility fabricated through rapid solidification and cryorolling

机译：通过快速凝固和冷轧制成的具有高强度和良好延展性的超细晶粒Cu-3Ag-xZr（x = 0.5，1.0 wt％）合金

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摘要

Ultrafine grained Cu-3Ag-xZr (x = 0.5, 1.0 wt%) alloys with high strength and good ductility were fabricated through rapid solidification in combination with cryorolling, followed by a short-time aging. The alloys after cryorolling exhibit a high strength but a relatively low ductility for the extremely high-density dislocations and large number of nano-/micro-sized particles. A significantly increased elongation is noticed with a relatively small decrease of strength in both alloys when aged at 400 ℃ for 10 min. The presence of ultrafine grains and increased density of nano-sized Ag precipitates during aging contribute to the retention of high strength. The reduction in dislocation density and the recovered ability of dislocation accumulation result in the increase of the ductility. Compared with the Cu-3Ag-0.5Zr alloy produced by casting and cryorolling combined with aging, the Cu-3Ag-xZr (x = 0.5, 1.0 wt%) alloys in this paper exhibit excellent combination of high strength and good ductility.
机译：通过快速凝固与低温轧制相结合，然后进行短时效处理，制造出具有高强度和良好延展性的超细晶粒Cu-3Ag-xZr（x = 0.5，1.0 wt％）合金。低温轧制后的合金具有很高的强度，但对于极高的密度位错和大量的纳米/微米级颗粒而言，延展性相对较低。当在400℃时效10分钟时，两种合金的伸长率都显着增加，而强度下降相对较小。时效过程中超细晶粒的存在和纳米级Ag沉淀物密度的增加有助于保持高强度。位错密度的降低和位错积累能力的恢复导致延展性的提高。与通过铸造和低温轧制并时效处理生产的Cu-3Ag-0.5Zr合金相比，本文中的Cu-3Ag-xZr（x = 0.5，1.0 wt％）合金具有高强度和良好延展性的优异组合。

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