Application of In Situ Neutron and X-Ray Measurements at High Temperatures in the Development of Co-Re-Based Alloys for Gas Turbines
Application of In Situ Neutron and X-Ray Measurements at High Temperatures in the Development of Co-Re-Based Alloys for Gas Turbines
复制标题
高温原位中子和 X 射线测量在燃气轮机用钴铼基合金开发中的应用
DOI：
10.1007/s11661-012-1363-6
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Z. Mácsik
中科院分区：
文献类型：
--
作者：
D. Mukherji;J. Rösler;J. Wehrs;P. Strunz;P.Beran;R. Gilles;M. Hofmann;M. Hoelzel;H. Eckerlebe;L. Szentmiklósi;Z. Mácsik
Co-Re合金的发展是为了寻找未来燃气轮机的新材料，这些材料可以在比目前单晶镍基高温合金高得多的温度下使用。co - re基合金被设计为具有非常高的熔化范围，并且它们适用于在+373 K（+100°C）以上的ni -高温合金。它们与用于当今燃气轮机静态部件的传统co基合金有很大不同，而且Co-Re合金以前从未用于结构应用。Co-Re-Cr体系结构复杂，存在多种不同相。在Co-Re合金中，高温下细小强化相的相变和稳定性仍未得到充分的研究，为了进一步了解Co-Re合金，在合金开发计划中研究了模型三元和季元成分。在这种情况下，在高温下的中子和同步加速器测量被广泛用于这一目的，并介绍了它们的一些最新结果。特别研究了硼掺杂对Co-Re合金的影响以及高温下TaC细相的稳定性。TaC析出相的良好分散增强了某些Co-Re合金，并且它们在应用温度下的稳定性至关重要。首先，简要论述了合金的发展策略。
Co-Re alloy development is prompted by the search for new materials for future gas turbines which can be used at temperatures considerably higher than the current day single crystal Ni-based superalloys. The Co-Re-based alloys have been designed to have very high melting range, and they are meant for application at +373 K (+100 °C) above Ni-superalloys. They are significantly different from the conventional Co-based alloys that are used in static components of today’s gas turbines, and the Co-Re alloys have never been used for structural applications before. The Co-Re-Cr system has complex microstructure with many different phases present. Phase transformations and stabilities of fine strengthening precipitates at high temperatures remain mostly unexplored in the Co-Re alloys, and to develop basic understanding, model ternary and quaternary compositions were studied within the alloy development program.In situneutron and synchrotron measurements at high temperatures were extensively used for this purpose, and some recent results from thein situmeasurements are presented. In particular, the effect of boron doping in Co-Re alloys and the stabilities of the fine TaC precipitates at high temperatures were investigated. A fine dispersion of TaC precipitates strengthens some Co-Re alloys, and their stabilities at the application temperatures are critical. In the beginning, the alloy development strategy is very briefly discussed.