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Novel wrought gamma/gamma ' cobalt base superalloys with high strength and improved oxidation resistance

机译:新型锻造γ/γ'钴基高温合金,具有高强度和改善的抗氧化性

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摘要

New polycrystalline Co-base superalloys with gamma/gamma' microstructure have been developed, which show excellent mechanical properties and enhanced oxidation behavior. The gamma' solvus temperature of these alloys is comparatively low giving a large processing window. The yield strength of these alloys is similar to that of wrought Ni-base superalloys. However, the creep strength at 750 degrees C is largely exceeding that of the Ni-base superalloys Waspaloy and Udimet 720Li. Oxidation tests indicate that the oxidation resistance is comparable to commercial Ni-base superalloys. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
机译:已经开发出具有γ/γ′微结构的新型多晶Co基高温合金,它们显示出优异的机械性能和增强的氧化性能。这些合金的伽玛溶解温度相对较低,因此加工窗口较大。这些合金的屈服强度与变形的镍基高温合金相似。但是,在750摄氏度下的蠕变强度大大超过了镍基高温合金Waspaloy和Udimet 720Li。氧化测试表明,其抗氧化性与市售的镍基高温合金相当。 (C)2015 Acta Materialia Inc.,由Elsevier Ltd.发行。保留所有权利。

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