Fatigue limit evaluation via infrared thermography for a high strength steel with two strength levels

Aiguo Zhao; Jijia Xie; Yingxin Zhao; Chuang Liu; Junchen Zhu; Guian Qian; Shuguang Wang; Youshi Hong

doi:10.1016/j.engfracmech.2022.108460

Fatigue limit evaluation via infrared thermography for a high strength steel with two strength levels

Aiguo Zhao, Jijia Xie, Yingxin Zhao, Chuang Liu, Junchen Zhu, Guian Qian, Shuguang Wang, Youshi Hong

School of Civil Engineering

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

18 Scopus citations

Abstract

The fatigue limit of a high strength steel (GCr15) with two strength levels (2372 MPa and 1044 MPa) was evaluated in terms of energy dissipation during high-cycle fatigue (HCF) and very-high-cycle fatigue (VHCF) process. Two methods based on the maximum temperature variation and intrinsic energy dissipation were used to assess the fatigue limit and the predicted results were in agreement with those of conventional fatigue tests. The grain boundary of tempered martensite for the specimen group with higher strength acts as barriers to resist dislocation gliding and multiplication, and thus it behaves lower heat dissipation and higher fatigue strength than the specimen group with lower strength.

Original language	English
Article number	108460
Journal	Engineering Fracture Mechanics
Volume	268
DOIs	https://doi.org/10.1016/j.engfracmech.2022.108460
State	Published - 1 Jun 2022

Keywords

Damage accumulation mechanism
High-cycle fatigue
Infrared thermography
Intrinsic dissipation
Microplasticity

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10.1016/j.engfracmech.2022.108460

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title = "Fatigue limit evaluation via infrared thermography for a high strength steel with two strength levels",

abstract = "The fatigue limit of a high strength steel (GCr15) with two strength levels (2372 MPa and 1044 MPa) was evaluated in terms of energy dissipation during high-cycle fatigue (HCF) and very-high-cycle fatigue (VHCF) process. Two methods based on the maximum temperature variation and intrinsic energy dissipation were used to assess the fatigue limit and the predicted results were in agreement with those of conventional fatigue tests. The grain boundary of tempered martensite for the specimen group with higher strength acts as barriers to resist dislocation gliding and multiplication, and thus it behaves lower heat dissipation and higher fatigue strength than the specimen group with lower strength.",

keywords = "Damage accumulation mechanism, High-cycle fatigue, Infrared thermography, Intrinsic dissipation, Microplasticity",

author = "Aiguo Zhao and Jijia Xie and Yingxin Zhao and Chuang Liu and Junchen Zhu and Guian Qian and Shuguang Wang and Youshi Hong",

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T1 - Fatigue limit evaluation via infrared thermography for a high strength steel with two strength levels

AU - Zhao, Aiguo

AU - Xie, Jijia

AU - Zhao, Yingxin

AU - Liu, Chuang

AU - Zhu, Junchen

AU - Qian, Guian

AU - Wang, Shuguang

AU - Hong, Youshi

PY - 2022/6/1

Y1 - 2022/6/1

N2 - The fatigue limit of a high strength steel (GCr15) with two strength levels (2372 MPa and 1044 MPa) was evaluated in terms of energy dissipation during high-cycle fatigue (HCF) and very-high-cycle fatigue (VHCF) process. Two methods based on the maximum temperature variation and intrinsic energy dissipation were used to assess the fatigue limit and the predicted results were in agreement with those of conventional fatigue tests. The grain boundary of tempered martensite for the specimen group with higher strength acts as barriers to resist dislocation gliding and multiplication, and thus it behaves lower heat dissipation and higher fatigue strength than the specimen group with lower strength.

AB - The fatigue limit of a high strength steel (GCr15) with two strength levels (2372 MPa and 1044 MPa) was evaluated in terms of energy dissipation during high-cycle fatigue (HCF) and very-high-cycle fatigue (VHCF) process. Two methods based on the maximum temperature variation and intrinsic energy dissipation were used to assess the fatigue limit and the predicted results were in agreement with those of conventional fatigue tests. The grain boundary of tempered martensite for the specimen group with higher strength acts as barriers to resist dislocation gliding and multiplication, and thus it behaves lower heat dissipation and higher fatigue strength than the specimen group with lower strength.

KW - Damage accumulation mechanism

KW - High-cycle fatigue

KW - Infrared thermography

KW - Intrinsic dissipation

KW - Microplasticity

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DO - 10.1016/j.engfracmech.2022.108460

M3 - 文章

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VL - 268

JO - Engineering Fracture Mechanics

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Fatigue limit evaluation via infrared thermography for a high strength steel with two strength levels

Abstract

Keywords

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