|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Deformation and Damage Mechanisms in High Temperature Ni, Co and Fe-based Superalloys
||E-19: Effect of Rhenium on Deformation Mechanisms during Creep in Ni-based Single-crystal Superalloys
||Vincent Huleux, Loïc Naze, Vladimir Esin, Vincent Maurel, Virginie Jaquet, Jérémy Rame
|On-Site Speaker (Planned)
Rhenium containing single-crystal nickel based superalloys have been developed in order to increase the resistance of aeronautic turbine engine blades to high temperature and stresses. In order to appraise the validity of various hypotheses to interpret the effect of rhenium on the creep strength of single crystal superalloys, five commercial superalloys, different in their rhenium content, are investigated on the basis of multiscale microstructure analysis and creep tests.
Creep tests at different temperatures (760 to 1150 ° C) and stresses were carried out in order to identify the deformation mechanisms. A number of those tests was stopped at different stages of the creep deformation in order to analyse by TEM the relevant dislocation microstructures. Correlations between microstructural deformation mechanisms and rhenium content are attempted. Substantial microstructural transformations (γ ' rafting and TCP precipitation) are also studied by TEM and considered in the interpretation of the effect of Rhenium on creep strength.
||Planned: Supplemental Proceedings volume