Title of article :
Influence of applied stress on the γ′ directional coarsening in a single crystal superalloy
Author/Authors :
K.Y. Cheng، نويسنده , , C.Y. Jo، نويسنده , , T. Jin، نويسنده , , Z.Q. Hu، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2010
Abstract :
It was found in a commercial single crystal superalloy CMSX-4 that preferential orientation of the γ′ rafting in dendrite core was not dependent on the sign of the applied stress σA, but on the sign of the sum of the applied stress σA and a critical equivalent stress σc. This critical equivalent stress σc caused by material inhomogeneity has been predicted previously; however it was first determined experimentally to be in the range 39.8–47.2 MPa in the present study. Moreover, it qualitatively demonstrated that the critical equivalent stress σc played a significant role in the creep behavior of superalloys at high temperature and low stress.
Journal title :
Materials and Design
Journal title :
Materials and Design