Alloys-By-Design: Application to nickel-based single crystal superalloys
Alloys-By-Design: Application to nickel-based single crystal superalloys
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DOI：
10.1016/j.actamat.2009.08.018
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发表时间：
2009-11-01
期刊：
影响因子：
9.4
通讯作者：
Warnken, N.
中科院分区：
文献类型：
--
作者：
Reed, R. C.;Tao, T.;Warnken, N.
设计规则提出的镍基单晶高温合金的组成可以系统地选择，使用模型的最重要的特性：抗蠕变性，微观结构的稳定性，可铸性，密度和成本。规则的应用允许非常大的构图空间被减少到仅仅几个理想的构图，这可能接近最佳构图。这些程序有可能消除传统上对重复性和基于试错的测试的依赖。然而，似乎必须接受权衡;例如，最抗蠕变的合金密度更高，成本更高，并且在加工过程中更容易出现与铸造相关的缺陷，如雀斑。提出了适合于喷气推进和陆基应用的组合物，用于未来的实验测试。(C)2009 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
Design rules are proposed by which the compositions of nickel-based single crystal superalloys can be chosen systematically, using models for the most important characteristics: creep resistance, microstructural stability, castability, density and cost. Application of the rules allows the very large compositional space to be reduced to just a few ideal compositions, which are likely to be close to the optimal ones. The procedures have the potential to remove much of the traditional reliance placed upon empiricism and trial-and-error-based testing. It appears that trade-offs must be accepted, however; for example, the most creep-resistant alloys are more dense, more costly and more inherently susceptible to casting-related defects such as freckles during processing. Compositions suitable for both jet propulsion and land-based applications are proposed, for future experimental testing. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.