论文信息 - A Creep Curve Regression of Ni-Base Superalloys Using Structural Parameters and Temerature-Stress Conditions

A Creep Curve Regression of Ni-Base Superalloys Using Structural Parameters and Temerature-Stress Conditions

We have proposed a new creep constitutive equation for Ni-base superalloys with good reproductibility and predictivity of various temperature-stress conditions. In this paper, a direct prediction of creep curves from alloy compositions, structural parameters and temperature-stress condition is reported. For each of testing conditions, 1100°C/137 MPa, 1000°C/245 MPa, 900°C/392 MPa, 10 to 20 kinds of creep curves are fitted, and multi-regression analysis for each parameter of creep constitutive equation are made with gamma-prime composition, lattice misfit, volume fraction. For each parameter of the regression equation obtained from these multi-regression analysis, a regression with temperature is carried out. The result gives a good predictivity for any creep curves, especcialy in interpolation.

T. Yokokawa | H. Harada | Hitoshi Izuno

[1] T. Yokokawa,et al. A Creep Curve Regression of Ni-Base Superalloys Using Log-exponential Functions , 2005 .

[2] T. Lograsso,et al. Mechanical properties of single crystal YAg , 2004 .

[3] M. Osawa,et al. Creep Strength of Co-Free Ni-Base Single Crystal Superalloys , 2005 .

[4] T. Yokokawa,et al. Applicability of a Creep Constitutive Equation for Ni-Base Superalloys Using Structural Parameters at Different Temperature-Stress Conditions , 2005 .