Thermal Gradient Mechanical Fatigue Assessment of a Nickel-Based Superalloy

Constitutive Model Based on Dynamic Recrystallization Behavior during Thermal Deformation of a Nickel-Based Superalloy

Peng Zhang 1, Cen Yi 1, Gang Chen 1, Heyong Qin 2 and Chuanjie Wang 1,* 1 School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China; [email protected] (P.Z.); [email protected] (C.Y.); [email protected] (G.C.) 2 Central Iron & Steel Research Institute, Beijing 100081, China; [email protected] * Correspondence: [email protected]; Tel.: +86-631-568...

Prediction of crack growth in a nickel-based superalloy under fatigue-oxidation conditions

Prediction of oxidation-assisted crack growth has been carried out for a nickel-based superalloy at elevated temperature based on finite element analyses of oxygen diffusion, coupled with viscoplastic deformation, near a fatigue crack tip. The material constitutive behaviour, implemented in the finite element code ABAQUS via a user-defined material subroutine (UMAT), was described by a unified ...

Mean vs. Life-limiting Fatigue Behavior of a Nickel-based Superalloy

The mean and the life-limiting behavior under fatigue of the nickel-based superalloy, IN100, separated (or converged) as a function of stress level and dwell loading. This behavior was related to the control of the life-limiting behavior by the smallcrack growth regime, producing its much slower response to stress level and dwell-time, relative to the mean-lifetime behavior. The lifetime probab...

Investigating variability of fatigue indicator parameters of two-phase nickel-based superalloy microstructures

Variability of fatigue properties of Nickel-based superalloys induced by microstructure feature uncertainties is investigated. The microstructure at one material point is described by its grain size and orientation features, as well as the volume fraction of the c0 phase. Principal component analysis (PCA) is introduced to reduce the dimensionality of the microstructure feature space. PCA and k...

Thermo-Mechanical Fatigue Life Assessment of a Diesel Engine Piston