基于Bodner-Partom理论的FGH96合金本构建模研究

doi:10.11896/cldb.19080111

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Abstract In order to study the deformation characteristics of a typical material powder metallurgy superalloy FGH96 used in aeroengine turbine disk, the Bodner-Partom (B-P) unified viscoplastic constitutive theory was used to construct its mechanical behavior of FGH96 at high temperature. Uniaxial tension and low cycle fatigue tests were carried out at 550 ℃, and the model parameters were identified and optimized by Levenberg-Marquardt algorithm. In order to improve the accuracy and reliability of the integration process, an integral step control strategy based on inelastic strain increment was introduced. The B-P model was introduced into ABAQUS finite element software through the user material subroutine UMAT for numerical simulation. The results showed that the FGH96 superalloy exhibits a certain rate dependence and cyclic softening characteristics at high temperature. The average relative error between the simulation curve and the test results is less than 10%, which shows that the B-P model can better simulate the deformation characteristics of FGH96 superalloy at high temperature, and the accuracy of the model and the UMAT subroutine is verified.

Key words： powder metallurgy superalloy deformation characteristics viscoplastic constitutive equation finite element

Published: 24 July 2020

CLC number:

TG146.2

Fund:This work was financially supported by the National Natural Science Foundation of China (51605487), the National Natural Science Foundation Youth Fund of China (61803071).

About author:: Yang Xiao, Ph. D. candidate, Department of Aviation Mechanical Engineering and Management in Qingdao Branch, Naval Aviation University. Received M.S. degree in December 2016 from Naval Aviation University. Main research interests are structural strength and reliability of aeroengine.
Kejun Xuis currently a professor and doctoral supervisor at Department of Aviation Mechanical Engineering and Management in Qingdao Branch, Naval Aviation University. His research interests focus on fault diagnosis and health assessment of aeroengine.

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Cite this article:

XIAO Yang,QIN Haiqin,XU Kejun. Study on Constitutive Model for FGH96 Superalloy Based on Bodner-Partom Theory[J]. Materials Reports, 2020, 34(16): 16125-16130.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.19080111 OR http://www.mater-rep.com/EN/Y2020/V34/I16/16125

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