Elevated-temperature gigacycle fatigue properties of nickel based superalloy: Grain related cracking mechanism and life prediction modelling

Xiaolong Li; Wei Li; Muhammad Imran Lashari; Tatsuo Sakai; Ping Wang; Yucheng Zhang; Liang Cai; Usama Hamid; Xiaoming Ding

doi:10.1016/j.engfracmech.2022.108254

Elevated-temperature gigacycle fatigue properties of nickel based superalloy: Grain related cracking mechanism and life prediction modelling

Xiaolong Li, Wei Li^*, Muhammad Imran Lashari, Tatsuo Sakai, Ping Wang, Yucheng Zhang, Liang Cai, Usama Hamid, Xiaoming Ding

^*Corresponding author for this work

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

10 Citations (Scopus)

Abstract

Fatigue properties of a nickel-based superalloy at 25 °C and 750 °C were studied under stress ratio R = −1 & 0.1 to identify crack nucleation and growth mechanisms. Results show that interior grain-related cracking is induced by microstructure in Goss or Copper grain. Moreover, owing to competition between temperature and vacuum effects, threshold values for small and long cracks, and the transition crack size, are all lower at elevated temperature. Finally, based on modeling of crack nucleation and growth, a fatigue life model with good prediction results is proposed. The crack nucleation consumes more than 90% of fatigue life.

Original language	English
Article number	108254
Journal	Engineering Fracture Mechanics
Volume	261
DOIs	https://doi.org/10.1016/j.engfracmech.2022.108254
Publication status	Published - 15 Feb 2022

Keywords

Elevated temperature
Gigacycle fatigue
Interior cracking
Life prediction
Nickel-based superalloy

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10.1016/j.engfracmech.2022.108254

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title = "Elevated-temperature gigacycle fatigue properties of nickel based superalloy: Grain related cracking mechanism and life prediction modelling",

abstract = "Fatigue properties of a nickel-based superalloy at 25 °C and 750 °C were studied under stress ratio R = −1 & 0.1 to identify crack nucleation and growth mechanisms. Results show that interior grain-related cracking is induced by microstructure in Goss or Copper grain. Moreover, owing to competition between temperature and vacuum effects, threshold values for small and long cracks, and the transition crack size, are all lower at elevated temperature. Finally, based on modeling of crack nucleation and growth, a fatigue life model with good prediction results is proposed. The crack nucleation consumes more than 90% of fatigue life.",

keywords = "Elevated temperature, Gigacycle fatigue, Interior cracking, Life prediction, Nickel-based superalloy",

author = "Xiaolong Li and Wei Li and Lashari, {Muhammad Imran} and Tatsuo Sakai and Ping Wang and Yucheng Zhang and Liang Cai and Usama Hamid and Xiaoming Ding",

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doi = "10.1016/j.engfracmech.2022.108254",

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TY - JOUR

T1 - Elevated-temperature gigacycle fatigue properties of nickel based superalloy

T2 - Grain related cracking mechanism and life prediction modelling

AU - Li, Xiaolong

AU - Li, Wei

AU - Lashari, Muhammad Imran

AU - Sakai, Tatsuo

AU - Wang, Ping

AU - Zhang, Yucheng

AU - Cai, Liang

AU - Hamid, Usama

AU - Ding, Xiaoming

PY - 2022/2/15

Y1 - 2022/2/15

N2 - Fatigue properties of a nickel-based superalloy at 25 °C and 750 °C were studied under stress ratio R = −1 & 0.1 to identify crack nucleation and growth mechanisms. Results show that interior grain-related cracking is induced by microstructure in Goss or Copper grain. Moreover, owing to competition between temperature and vacuum effects, threshold values for small and long cracks, and the transition crack size, are all lower at elevated temperature. Finally, based on modeling of crack nucleation and growth, a fatigue life model with good prediction results is proposed. The crack nucleation consumes more than 90% of fatigue life.

AB - Fatigue properties of a nickel-based superalloy at 25 °C and 750 °C were studied under stress ratio R = −1 & 0.1 to identify crack nucleation and growth mechanisms. Results show that interior grain-related cracking is induced by microstructure in Goss or Copper grain. Moreover, owing to competition between temperature and vacuum effects, threshold values for small and long cracks, and the transition crack size, are all lower at elevated temperature. Finally, based on modeling of crack nucleation and growth, a fatigue life model with good prediction results is proposed. The crack nucleation consumes more than 90% of fatigue life.

KW - Elevated temperature

KW - Gigacycle fatigue

KW - Interior cracking

KW - Life prediction

KW - Nickel-based superalloy

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U2 - 10.1016/j.engfracmech.2022.108254

DO - 10.1016/j.engfracmech.2022.108254

M3 - Article

AN - SCOPUS:85122683803

SN - 0013-7944

VL - 261

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

M1 - 108254

ER -

Elevated-temperature gigacycle fatigue properties of nickel based superalloy: Grain related cracking mechanism and life prediction modelling

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Keywords

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