The influence of C/Ta ratio on TaC precipitates in Co-Re base alloys investigated by small-angle neutron scattering
The influence of C/Ta ratio on TaC precipitates in Co-Re base alloys investigated by small-angle neutron scattering
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DOI：
10.1016/j.actamat.2017.04.029
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发表时间：
2017-06-15
期刊：
影响因子：
9.4
通讯作者：
Petry, W.
中科院分区：
文献类型：
--
作者：
Karge, L.;Gilles, R.;Petry, W.
钴铼合金正在开发中，以补充未来燃气轮机中用于超高温应用的镍基高温合金。TaC中细小分布的一元碳化物相是该合金中重要的强化相，在高温蠕变变形过程中与位错相互作用。本研究的目的是确定和理解的体积分数和尺寸分布的TaC沉淀物的依赖于C/Ta化学计量和热处理，通过原位小角中子散射。在1173 K、1373 K和1473 K的测量温度下，
Co-Re alloys are being developed to supplement Ni-base superalloys in future gas turbines for ultra-high temperature applications. The finely distributed mono-carbide phase of TaC is an important strengthening phase in this alloy, and interacts with dislocations during high temperature creep deformation. This study aims to determine and to understand the volume fraction and size distribution of TaC precipitates in dependence of C/Ta stoichiometry and heat treatment by means of in-situ small-angle neutron scattering. At measuring temperatures of 1173 K, 1373 K and 1473 K, a stable population of fine TaC