|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Deformation and Damage Mechanisms in High Temperature Ni, Co and Fe-based Superalloys
||The Effects of Aging Heat Treatments on the Mechanical Performance of an Inconel 740 Casting
||Kyle Rozman, Martin Detrois, Paul Jablonski, Jeffrey Hawk
|On-Site Speaker (Planned)
The National Energy Technology Laboratory has developed computationally optimized homogenization heat treatments to minimize detrimental elemental segregation typical of castings. Such heat treatments have been used to produce castings of nickel alloys providing pathways for complex cast structural parts for use in advanced ultra-supercritical steam turbines. However, efforts to cast and heat treat Inconel 740 have yielded less than desirable creep properties relative to the wrought alloy. Various post homogenization heat treatments were employed in attempt to modify the grain boundary morphology through the development of specific carbide phases on the grain boundary as well as trying to develop eta. The influence of the resulting microstructures on the creep properties as well as the fracture mode of the alloy will be discussed. The results from the cast Inconel alloy 740 will be compared to those from a wrought version of identical composition.
||Planned: Supplemental Proceedings volume