Study on Creep-Fatigue Mechanical Behavior and Life Prediction of Ti2AlNb-Based Alloy

Yanju Wang; Xinhao Wang; Yanfeng Yang; Xiang Lan; Zhao Zhang; Heng Li

doi:10.3390/ma15186238

Study on Creep-Fatigue Mechanical Behavior and Life Prediction of Ti₂AlNb-Based Alloy

Yanju Wang, Xinhao Wang, Yanfeng Yang, Xiang Lan, Zhao Zhang, Heng Li

School of Materials Sience and Engineering

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

12 Scopus citations

Abstract

Low-cycle fatigue, creep and creep-fatigue tests of Ti₂AlNb-based alloy were carried out at 550 °C. Compared with low-cycle fatigue, a creep-fatigue hysteresis loop has larger area and smaller average stress. The introduction of creep damage will greatly reduce the cycle life, and change the fatigue crack initiation point and failure mechanism. Based on the linear damage accumulation rule, the fatigue damage and creep damage were described by the life fraction method and the time fraction method, respectively, and the creep-fatigue life of the Ti₂AlNb-based alloy is predicted within an error band of ±2 times.

Original language	English
Article number	6238
Journal	Materials
Volume	15
Issue number	18
DOIs	https://doi.org/10.3390/ma15186238
State	Published - Sep 2022

Keywords

creep-fatigue
fracture mechanism
life prediction
TiAlNb-based alloy

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title = "Study on Creep-Fatigue Mechanical Behavior and Life Prediction of Ti2AlNb-Based Alloy",

abstract = "Low-cycle fatigue, creep and creep-fatigue tests of Ti2AlNb-based alloy were carried out at 550 °C. Compared with low-cycle fatigue, a creep-fatigue hysteresis loop has larger area and smaller average stress. The introduction of creep damage will greatly reduce the cycle life, and change the fatigue crack initiation point and failure mechanism. Based on the linear damage accumulation rule, the fatigue damage and creep damage were described by the life fraction method and the time fraction method, respectively, and the creep-fatigue life of the Ti2AlNb-based alloy is predicted within an error band of ±2 times.",

keywords = "creep-fatigue, fracture mechanism, life prediction, TiAlNb-based alloy",

author = "Yanju Wang and Xinhao Wang and Yanfeng Yang and Xiang Lan and Zhao Zhang and Heng Li",

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T1 - Study on Creep-Fatigue Mechanical Behavior and Life Prediction of Ti2AlNb-Based Alloy

AU - Wang, Yanju

AU - Wang, Xinhao

AU - Yang, Yanfeng

AU - Lan, Xiang

AU - Zhang, Zhao

AU - Li, Heng

PY - 2022/9

Y1 - 2022/9

N2 - Low-cycle fatigue, creep and creep-fatigue tests of Ti2AlNb-based alloy were carried out at 550 °C. Compared with low-cycle fatigue, a creep-fatigue hysteresis loop has larger area and smaller average stress. The introduction of creep damage will greatly reduce the cycle life, and change the fatigue crack initiation point and failure mechanism. Based on the linear damage accumulation rule, the fatigue damage and creep damage were described by the life fraction method and the time fraction method, respectively, and the creep-fatigue life of the Ti2AlNb-based alloy is predicted within an error band of ±2 times.

AB - Low-cycle fatigue, creep and creep-fatigue tests of Ti2AlNb-based alloy were carried out at 550 °C. Compared with low-cycle fatigue, a creep-fatigue hysteresis loop has larger area and smaller average stress. The introduction of creep damage will greatly reduce the cycle life, and change the fatigue crack initiation point and failure mechanism. Based on the linear damage accumulation rule, the fatigue damage and creep damage were described by the life fraction method and the time fraction method, respectively, and the creep-fatigue life of the Ti2AlNb-based alloy is predicted within an error band of ±2 times.

KW - creep-fatigue

KW - fracture mechanism

KW - life prediction

KW - TiAlNb-based alloy

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U2 - 10.3390/ma15186238

DO - 10.3390/ma15186238

M3 - 文章

AN - SCOPUS:85138750640

SN - 1996-1944

VL - 15

JO - Materials

JF - Materials

IS - 18

M1 - 6238

ER -

Study on Creep-Fatigue Mechanical Behavior and Life Prediction of Ti₂AlNb-Based Alloy

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Keywords

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