Microstructure evolution and mechanical properties of disk superalloy under multiplex heat treatment
Microstructure evolution and mechanical properties of disk superalloy under multiplex heat treatment
复制标题
DOI：
10.1016/j.msea.2016.02.038
复制
发表时间：
2016-04
期刊：
影响因子：
6.4
通讯作者：
C. Jia;C. Ge;Q. Yan
中科院分区：
文献类型：
--
作者：
C. Jia;C. Ge;Q. Yan
对粉末冶金镍基高温合金FGH100的涡轮盘进行了复合热处理，并研究了其力学性能的改善，这对该合金在航空发动机上的应用至关重要。通过显微组织演变和拉伸试验对MHT的作用进行了评价。结果表明，经过多次热处理后，合金中γ‘相的组织特征发生了变化，但平均晶粒度变化不大。FGH100盘类锻件经循环MHT处理后，获得了优化的组织和优异的综合性能。这项研究报告了对涡轮机维护的重要影响。
Turbine disks of a powder metallurgy (PM) nickel-based superalloy FGH100 were subjected to multiplex heat treatment (MHT) and investigated in terms of the improvements in their mechanical properties, which are critical for the application of these alloys in aero-engines. The effects of MHT were assessed by microstructure evolution and tensile test measurements. The results show that the microstructural characteristics of the constituent γ′ phase in the alloy change after repeated heat treatment, while the average grain sizes vary slightly. An optimized microstructure and excellent overall properties were achieved for FGH100 disk forgings by employing cyclic MHT. This study reports significant implications for the maintenance of turbines.