High cycle fatigue performance at 650 °C and corresponding fracture behaviors of GH4169 joint produced by linear friction welding

Shitong MA; Xiawei YANG; Zhenguo GUO; Yu SU; Xinyuan HE; Ju LI; Jun TAO; Bo XIAO; Wenya LI

doi:10.1016/j.cja.2024.06.022

High cycle fatigue performance at 650 °C and corresponding fracture behaviors of GH4169 joint produced by linear friction welding

Shitong MA, Xiawei YANG^*, Zhenguo GUO, Yu SU, Xinyuan HE, Ju LI, Jun TAO, Bo XIAO, Wenya LI

^*Corresponding author for this work

Department of Mechanical Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

3 Citations (Scopus)

14 Downloads (CityUHK Scholars)

Abstract

GH4169 joints manufactured by Linear Friction Welding (LFW) are subjected to tensile test and stair-case method to evaluate the High Cycle Fatigue (HCF) performance at 650 ℃. The yield and ultimate tensile strengths are 582 MPa and 820 MPa, respectively. The HCF strength of joint reaches 400 MPa, which is slightly lower than that of Base Metal (BM), indicating reliable quality of this type of joint. The microstructure observation results show that all cracks initiate at the inside of specimens and transfer into deeper region with decrease of external stress, and the crack initiation site is related with microhardness of matrix. The Electron Backscattered Diffraction (EBSD) results of the observed regions with different distances to fracture show that plastic deformation plays a key role in HCF, and the Schmid factor of most grains near fracture exceeds 0.4. In addition, the generation of twins plays a vital role in strain concentration release and coordinating plastic deformation among grains. © 2024

Original language	English
Article number	103113
Journal	Green Carbon
Volume	38
Issue number	1
Online published	25 Jun 2024
DOIs	https://doi.org/10.1016/j.cja.2024.06.022
Publication status	Published - Jan 2025

Research Keywords

Fracture mechanism
GH4169 superalloy
High cycle fatigue
Linear friction welding
Microstructure evolution

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This full text is made available under CC-BY-NC-ND 4.0. https://creativecommons.org/licenses/by-nc-nd/4.0/

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title = "High cycle fatigue performance at 650 °C and corresponding fracture behaviors of GH4169 joint produced by linear friction welding",

abstract = "GH4169 joints manufactured by Linear Friction Welding (LFW) are subjected to tensile test and stair-case method to evaluate the High Cycle Fatigue (HCF) performance at 650 ℃. The yield and ultimate tensile strengths are 582 MPa and 820 MPa, respectively. The HCF strength of joint reaches 400 MPa, which is slightly lower than that of Base Metal (BM), indicating reliable quality of this type of joint. The microstructure observation results show that all cracks initiate at the inside of specimens and transfer into deeper region with decrease of external stress, and the crack initiation site is related with microhardness of matrix. The Electron Backscattered Diffraction (EBSD) results of the observed regions with different distances to fracture show that plastic deformation plays a key role in HCF, and the Schmid factor of most grains near fracture exceeds 0.4. In addition, the generation of twins plays a vital role in strain concentration release and coordinating plastic deformation among grains. {\textcopyright} 2024",

keywords = "Fracture mechanism, GH4169 superalloy, High cycle fatigue, Linear friction welding, Microstructure evolution",

author = "Shitong MA and Xiawei YANG and Zhenguo GUO and Yu SU and Xinyuan HE and Ju LI and Jun TAO and Bo XIAO and Wenya LI",

year = "2025",

month = jan,

doi = "10.1016/j.cja.2024.06.022",

language = "English",

volume = "38",

journal = "Green Carbon",

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TY - JOUR

T1 - High cycle fatigue performance at 650 °C and corresponding fracture behaviors of GH4169 joint produced by linear friction welding

AU - MA, Shitong

AU - YANG, Xiawei

AU - GUO, Zhenguo

AU - SU, Yu

AU - HE, Xinyuan

AU - LI, Ju

AU - TAO, Jun

AU - XIAO, Bo

AU - LI, Wenya

PY - 2025/1

Y1 - 2025/1

N2 - GH4169 joints manufactured by Linear Friction Welding (LFW) are subjected to tensile test and stair-case method to evaluate the High Cycle Fatigue (HCF) performance at 650 ℃. The yield and ultimate tensile strengths are 582 MPa and 820 MPa, respectively. The HCF strength of joint reaches 400 MPa, which is slightly lower than that of Base Metal (BM), indicating reliable quality of this type of joint. The microstructure observation results show that all cracks initiate at the inside of specimens and transfer into deeper region with decrease of external stress, and the crack initiation site is related with microhardness of matrix. The Electron Backscattered Diffraction (EBSD) results of the observed regions with different distances to fracture show that plastic deformation plays a key role in HCF, and the Schmid factor of most grains near fracture exceeds 0.4. In addition, the generation of twins plays a vital role in strain concentration release and coordinating plastic deformation among grains. © 2024

AB - GH4169 joints manufactured by Linear Friction Welding (LFW) are subjected to tensile test and stair-case method to evaluate the High Cycle Fatigue (HCF) performance at 650 ℃. The yield and ultimate tensile strengths are 582 MPa and 820 MPa, respectively. The HCF strength of joint reaches 400 MPa, which is slightly lower than that of Base Metal (BM), indicating reliable quality of this type of joint. The microstructure observation results show that all cracks initiate at the inside of specimens and transfer into deeper region with decrease of external stress, and the crack initiation site is related with microhardness of matrix. The Electron Backscattered Diffraction (EBSD) results of the observed regions with different distances to fracture show that plastic deformation plays a key role in HCF, and the Schmid factor of most grains near fracture exceeds 0.4. In addition, the generation of twins plays a vital role in strain concentration release and coordinating plastic deformation among grains. © 2024

KW - Fracture mechanism

KW - GH4169 superalloy

KW - High cycle fatigue

KW - Linear friction welding

KW - Microstructure evolution

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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85203664474&origin=recordpage

U2 - 10.1016/j.cja.2024.06.022

DO - 10.1016/j.cja.2024.06.022

M3 - RGC 21 - Publication in refereed journal

SN - 2950-1555

VL - 38

JO - Green Carbon

JF - Green Carbon

IS - 1

M1 - 103113

ER -

High cycle fatigue performance at 650 °C and corresponding fracture behaviors of GH4169 joint produced by linear friction welding

Abstract

Research Keywords

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