A non-isothermal creep fracture prediction method of DS superalloy considering microstructural damage

Shuning Gu; Hangshan Gao; Jundong Wang; Chengjiang Zhang; Zhixun Wen; Ai Xing; Zhufeng Yue

doi:10.1016/j.engfracmech.2023.109350

A non-isothermal creep fracture prediction method of DS superalloy considering microstructural damage

Shuning Gu, Hangshan Gao, Jundong Wang, Chengjiang Zhang, Zhixun Wen, Ai Xing, Zhufeng Yue

School of Mechanics,Civil Engineering and Architecture

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Nonisothermal service conditions are one of the main abnormal failure modes of aero-engines. The creep tests of a Ni-based directionally solidified superalloy under nonisothermal creep conditions (T_over = 980 °C, 1000 °C and 1020 °C) and constant load (σ = 227 MPa) were analyzed by SEM. According to the creep tests, we calculate the key creep parameters. By studying tests interrupted at different stages of creep, the microstructure evolution law is obtained. Based on the above research, an improved constitutive model is proposed. The creep behavior under different T_over is simulated and calculated. The simulation results are in good agreement with the experimental results.

Original language	English
Article number	109350
Journal	Engineering Fracture Mechanics
Volume	287
DOIs	https://doi.org/10.1016/j.engfracmech.2023.109350
State	Published - 14 Jul 2023

Keywords

Fatigue crack growth
Initial flaw size
Plastic zone size
Variable amplitude loading

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10.1016/j.engfracmech.2023.109350

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title = "A non-isothermal creep fracture prediction method of DS superalloy considering microstructural damage",

abstract = "Nonisothermal service conditions are one of the main abnormal failure modes of aero-engines. The creep tests of a Ni-based directionally solidified superalloy under nonisothermal creep conditions (Tover = 980 °C, 1000 °C and 1020 °C) and constant load (σ = 227 MPa) were analyzed by SEM. According to the creep tests, we calculate the key creep parameters. By studying tests interrupted at different stages of creep, the microstructure evolution law is obtained. Based on the above research, an improved constitutive model is proposed. The creep behavior under different Tover is simulated and calculated. The simulation results are in good agreement with the experimental results.",

keywords = "Fatigue crack growth, Initial flaw size, Plastic zone size, Variable amplitude loading",

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T1 - A non-isothermal creep fracture prediction method of DS superalloy considering microstructural damage

AU - Gu, Shuning

AU - Gao, Hangshan

AU - Wang, Jundong

AU - Zhang, Chengjiang

AU - Wen, Zhixun

AU - Xing, Ai

AU - Yue, Zhufeng

PY - 2023/7/14

Y1 - 2023/7/14

N2 - Nonisothermal service conditions are one of the main abnormal failure modes of aero-engines. The creep tests of a Ni-based directionally solidified superalloy under nonisothermal creep conditions (Tover = 980 °C, 1000 °C and 1020 °C) and constant load (σ = 227 MPa) were analyzed by SEM. According to the creep tests, we calculate the key creep parameters. By studying tests interrupted at different stages of creep, the microstructure evolution law is obtained. Based on the above research, an improved constitutive model is proposed. The creep behavior under different Tover is simulated and calculated. The simulation results are in good agreement with the experimental results.

AB - Nonisothermal service conditions are one of the main abnormal failure modes of aero-engines. The creep tests of a Ni-based directionally solidified superalloy under nonisothermal creep conditions (Tover = 980 °C, 1000 °C and 1020 °C) and constant load (σ = 227 MPa) were analyzed by SEM. According to the creep tests, we calculate the key creep parameters. By studying tests interrupted at different stages of creep, the microstructure evolution law is obtained. Based on the above research, an improved constitutive model is proposed. The creep behavior under different Tover is simulated and calculated. The simulation results are in good agreement with the experimental results.

KW - Fatigue crack growth

KW - Initial flaw size

KW - Plastic zone size

KW - Variable amplitude loading

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U2 - 10.1016/j.engfracmech.2023.109350

DO - 10.1016/j.engfracmech.2023.109350

M3 - 文章

AN - SCOPUS:85160022639

SN - 0013-7944

VL - 287

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

M1 - 109350

ER -

A non-isothermal creep fracture prediction method of DS superalloy considering microstructural damage

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Keywords

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