Influence of Solid Solution Hardening on Creep Properties of Single-Crystal Nickel-Based Superalloys
Influence of Solid Solution Hardening on Creep Properties of Single-Crystal Nickel-Based Superalloys
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DOI：
10.1007/s11661-014-2727-x
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发表时间：
2015-03-01
影响因子：
2.8
通讯作者：
Glatzel, Uwe
中科院分区：
文献类型：
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作者：
Fleischmann, Ernst;Konrad, Christian;Glatzel, Uwe
通过与难熔元素合金化来改善基体的抗蠕变性是镍基高温合金的主要强化效果，其中难熔元素是最有效的元素之一。在这项工作中，蠕变性能的影响，单相单晶体具有不同的蠕变含量和近基体成分的影响进行了研究。单晶材料的使用导致非常明显的结果，其不受晶界效应的影响。因此，这种强化作用可以单独归因于合金元素Cr，并首次被定量化。通过比较两种基体组合物与相应的单晶高温合金的蠕变强度，使用阈值应力的概念，在两相单晶合金中的基体的蠕变强化的潜力被量化。(C)矿物、金属和材料协会和ASM国际2015
Improving the creep resistance of the matrix by alloying with refractory elements is a major strengthening effect in nickel-based superalloy with rhenium as one of the most effective elements. In this work, the influence of rhenium on creep properties of single-phase single crystals with varying rhenium content and matrix-near composition is investigated. The use of single-crystalline material leads to very distinct results which are not deteriorated by grain boundary effects. So the strengthening effect can be solely attributed to the alloying element rhenium and is quantified for the first time. By comparing the creep strength of two matrix compositions with the corresponding single-crystal superalloys using the threshold stress concept, the potential of creep strengthening of the matrix in two-phase single-crystal alloys is quantified. (C) The Minerals, Metals & Materials Society and ASM International 2015