|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Deformation and Damage Mechanisms in High Temperature Ni, Co and Fe-based Superalloys
||Effects of Ageing on Microstructure, Elemental Distribution and Low Cycle Fatigue Behavior and Corresponding Deformation Mechanisms of Haynes-282 at Elevated Temperatures
||Shreya Mukherjee, Sujoy Kumar Kar, Soumitra Tarafder, S. Sivaprasad, Puspendu Sahu
|On-Site Speaker (Planned)
γ/γ<SUP>′</SUP> strengthened Ni-based superalloys are mostly designed for creep resistance and improved fatigue durability. In the present study high temperature low cycle fatigue (LCF) behaviour of Haynes 282, γ<SUP>′</SUP> strengthened wrought superalloy has been investigated as a function of γ<SUP>′</SUP> particle size obtained through different ageing treatments (at 650 °C and 760 °C for different times). Precise lattice parameters of γ and γ<SUP>′</SUP> and misfit between them were obtained by Rietveld's refinement done on synchrotron XRD patterns of the bulk samples. Using TEM, precipitate size evolution and using STEM and Atom Probe Tomography elemental segregation were observed as a function of ageing time at different temperatures. In this paper, cyclic hardening and softening behavior during LCF, observed through evolutions of stress amplitude, plastic strain amplitude as a function of microstructure would be discussed. Fractographic examination of failure and underlying deformation mechanism study carried out using TEM would also be presented.
||Planned: Supplemental Proceedings volume