Fatigue properties of as-welded and post-weld-treated high-strength steel joints: The influence of constant and variable amplitude loads

Halid Can Yıldırım; Heikki Remes; Alain Nussbaumer

doi:10.1016/j.ijfatigue.2020.105687

Fatigue properties of as-welded and post-weld-treated high-strength steel joints: The influence of constant and variable amplitude loads

Halid Can Yıldırım^*
, Heikki Remes
, Alain Nussbaumer

^*Corresponding author for this work

Department of Energy and Mechanical Engineering

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

31 Citations (Scopus)

152 Downloads (Pure)

Abstract

In HSS welded structures, HFMI allows fatigue strength improvement factors by inducing compressive residual stresses, cold-worked surface region and modifying the weld toe shape. According to the literature, the factors are proposed based on failures at CAL and also checked with a limited dataset at VAL, the latter being more realistic of service loadings. Therefore, this paper investigates the behaviour of HFMI welds at CAL and VAL for R = −0.43. Studies are also performed at the microstructural level for locating the crack initiation and hardness. Fatigue damage sums are evaluated and discussed with the recommended values in the literature.

Original language	English
Article number	105687
Number of pages	22
Journal	International Journal of Fatigue
Volume	138
Early online date	17 May 2020
DOIs	https://doi.org/10.1016/j.ijfatigue.2020.105687
Publication status	Published - Sept 2020
MoE publication type	A1 Journal article-refereed

Funding

Partially support of this work was provided under the European Project Hi-Life of Horizon 2020 with the Grant Agreement ID 702233: Damage mechanism of High Frequency Mechanical Impact (HFMI) Treated Welded Structures under Service Loading to Increase the Fatigue Life for Lightweight Design .

Keywords

Fatigue strength improvement
High-frequency mechanical impact treatment
High-strength steel
Service loading

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10.1016/j.ijfatigue.2020.105687

ENG_Yildirim_et_al_Fatigue_properties_of_as-welded_International_Journal_of_FatigueAccepted author manuscript, 5.04 MBLicence: CC BY-NC-ND

Cite this

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title = "Fatigue properties of as-welded and post-weld-treated high-strength steel joints: The influence of constant and variable amplitude loads",

abstract = "In HSS welded structures, HFMI allows fatigue strength improvement factors by inducing compressive residual stresses, cold-worked surface region and modifying the weld toe shape. According to the literature, the factors are proposed based on failures at CAL and also checked with a limited dataset at VAL, the latter being more realistic of service loadings. Therefore, this paper investigates the behaviour of HFMI welds at CAL and VAL for R = −0.43. Studies are also performed at the microstructural level for locating the crack initiation and hardness. Fatigue damage sums are evaluated and discussed with the recommended values in the literature.",

keywords = "Fatigue strength improvement, High-frequency mechanical impact treatment, High-strength steel, Service loading",

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language = "English",

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T2 - The influence of constant and variable amplitude loads

AU - Yıldırım, Halid Can

AU - Remes, Heikki

AU - Nussbaumer, Alain

N1 - | openaire: EC/H2020/702233/EU//Hi-Life

PY - 2020/9

Y1 - 2020/9

N2 - In HSS welded structures, HFMI allows fatigue strength improvement factors by inducing compressive residual stresses, cold-worked surface region and modifying the weld toe shape. According to the literature, the factors are proposed based on failures at CAL and also checked with a limited dataset at VAL, the latter being more realistic of service loadings. Therefore, this paper investigates the behaviour of HFMI welds at CAL and VAL for R = −0.43. Studies are also performed at the microstructural level for locating the crack initiation and hardness. Fatigue damage sums are evaluated and discussed with the recommended values in the literature.

AB - In HSS welded structures, HFMI allows fatigue strength improvement factors by inducing compressive residual stresses, cold-worked surface region and modifying the weld toe shape. According to the literature, the factors are proposed based on failures at CAL and also checked with a limited dataset at VAL, the latter being more realistic of service loadings. Therefore, this paper investigates the behaviour of HFMI welds at CAL and VAL for R = −0.43. Studies are also performed at the microstructural level for locating the crack initiation and hardness. Fatigue damage sums are evaluated and discussed with the recommended values in the literature.

KW - Fatigue strength improvement

KW - High-frequency mechanical impact treatment

KW - High-strength steel

KW - Service loading

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M3 - Article

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VL - 138

JO - International Journal of Fatigue

JF - International Journal of Fatigue

M1 - 105687

ER -

Fatigue properties of as-welded and post-weld-treated high-strength steel joints: The influence of constant and variable amplitude loads

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Fatigue properties of as-welded and post-weld-treated high-strength steel joints: The influence of constant and variable amplitude loads

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Funding

Keywords

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i3 – Industry Innovation Infrastructure

Solid Mechanics Laboratory (i3)

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