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首页> 外文期刊>Scripta materialia >A new 2.4 GPa extra-high strength steel with good ductility and high toughness designed by synergistic strengthening of nano-particles and high-density dislocations
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A new 2.4 GPa extra-high strength steel with good ductility and high toughness designed by synergistic strengthening of nano-particles and high-density dislocations

机译：一种新的2.4 GPA超高强度钢，具有良好的延展性和高韧性，通过协同强化纳米粒子和高密度脱位设计

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摘要

A new 0.25C2Cr10Ni8Co2Mo2Al steel was designed and fabricated by vacuum induction melting, forging and heat treatments. Excellent mechanical properties with a combination of a 2.4 GPa ultimate tensile strength, a 2.1 GPa yield strength, a 11.4% total elongation and a 37 J/cm(2) V-notch impact toughness were obtained. Such a combination of strength-ductility-toughness of the present steel is much superior than any reported conventional ultrahigh strength steel. The excellent mechanical properties of the steel can be well interpreted by synergistic strengthening of high-density dislocations, strong segregations of C, Mo and Cr on dislocations and massive nanosized NiAl precipitations. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
机译：通过真空诱导熔化，锻造和热处理设计和制造了新的0.25c2cr10ni8co2mo2钢。 优异的机械性能具有2.4GPa极限拉伸强度，2.1GPa屈服强度，11.4％的总伸长率和37J / cm（2）V-Notch抗冲韧性。 本钢的强度延展性 - 韧性的这种组合比任何报道的传统超高强度钢都太高得多。 通过协同强度强化高密度脱位，C，Mo和Cr在脱位上的强度和大规模纳米沉淀物上的强度和大规模纳米沉淀物的协同脱位，钢的优异机械性能可以很好地解释。 （c）2019年Acta Materialia Inc.出版By Elsevier Ltd.保留所有权利。

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