Effect of Residual Stresses on Fatigue Crack Growth: A Numerical Study Based on Cumulative Plastic Strain at the Crack Tip

Neto, Diogo M.; Borges, M.F.; Sérgio, E.R.; Antunes, F.V.

doi:10.3390/ma15062156

Cited by 16 publications

(3 citation statements)

References 48 publications

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“…Compressive and tensile residual stresses in materials can exert opposing effects on the material's properties and performance. CRS can benefit fatigue-loaded structures by delaying crack growth, thereby enhancing the material's fatigue life [34]. Conversely, TRS decrease the fatigue life of the material as they can initiate crack growth and propagation.…”

Section: Residual Stressmentioning

confidence: 99%

Residual Stress Analysis of Laser Cladded Commercially Pure Grade Titanium Alloy Plates

Lawrence Ngake,

Vuyolwethu Mjali

2024

Titanium-Based Alloys - Characteristics and Applications

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The aim of this study was to determine the influence of laser power on the microstructure, hardness, and residual stresses of laser-cladded titanium alloy. Laser powers of 600, 800, and 1000 W were varied while keeping other processing parameters constant. Microhardness and microstructure measurements were conducted using a Vickers microhardness tester and an optical microscope, respectively. Residual stresses were determined using an X-ray diffractometer (XRD). The results obtained revealed a non-linear relationship between microhardness and increasing laser power. Microstructural analysis indicated a transformation from all α grains to α′ martensite in the cladded zone, observed across all laser powers. Residual stress measurements showed a consistent tensile trend, decreasing with increasing laser power. The issue of increasing tensile residual stress can be mitigated by adjusting the laser power with minimal impact on the microstructure. These findings highlight the significant influence of processing parameters on surface properties, suggesting the potential for optimizing laser cladding parameters to enhance material corrosion and abrasion resistance properties.

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Section: Residual Stressmentioning

confidence: 99%

Residual Stress Analysis of Laser Cladded Commercially Pure Grade Titanium Alloy Plates

Lawrence Ngake,

Vuyolwethu Mjali

2024

Titanium-Based Alloys - Characteristics and Applications

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“…Lopez-Jauregi et al [30] developed a procedure to estimate the fatigue life of welded joints considering residual stress. Neto et al [31] studied numerically the effect of residual stress on fatigue crack growth. Esnaola et al [32] determined temperature and residual stress distribution in a multi pass butt weld using new method to define heat source energy.…”

Section: Introductionmentioning

confidence: 99%

Fatigue assessment of welded joints and crack growth considering residual stress

Rahbar Ranji,

Najafi Gishanim,

Alirezaee

2023

Eng. Res. Express

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There are different approaches to investigate the fatigue life of welded joints, however, less has been done considering residual stresses. The heat and residual stress distribution of a butt weld joint are determined using ABAQUS software and the results are validated against experimental and numerical studies in the literature. The software FE-SAFE is used to study the fatigue life of a GMAW welded butt joint under high cycle loading considering the residual stress. The corresponding S-N curve is determined, and the results show that the longer the length of welds, the higher residual stress and lower fatigue life. The crack nucleation and propagation in the butt weld simulated using XEFM software, and it is found that crack starts from the position of highest restrain.

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“…Leveraging these metrics, it becomes feasible to quantitatively measure the extent of these elements following rigorous processes like SP, thereby offering valuable insights into fatigue life and wear resistance. Neto, Diogo M., et al explored cumulative strain effects on fatigue life, finding that crack propagation in the compressive residual stress field resulted in a decrease in the fatigue crack growth (FCG) rate [19]. The novelty of this research lies in delving into the effects of CCRS rather than cumulative strain effects, despite the limited data available in the literatures for cumulative observations such as strain and stress.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Shot-Peening Parameters for Steel AISI 316L via Response Surface Methodology (RSM): Introducing two novel mechanical aspects

Ebrahimzadeh,

Peral,

Pariente

et al. 2023

Preprint

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Shot peening (SP) is a surface modification technique employed to enhance and modify the mechanical properties of metals by inducing compressive residual stresses on the material's surface. AISI 316L stainless steel is a commonly used material in many applications due to its excellent corrosion resistance, weldability and good mechanical properties. The optimization of SP parameters can lead to improved mechanical properties and better performance of AISI 316L. Response surface methodology (RSM) is a statistical method that is used to optimize SP parameters and to study the effect of these variables on the mechanical properties of the steel. RSM involves fitting a mathematical model to the experimental data to identify the significant factors involved and their interactions, and the provided model was the applied to optimize the process attributes. The SP factors that were optimized in this particular investigation using the RSM include coverage time, shot velocity (air pressure), while shot ball size, SP distance and shot angle were maintained constant. The studied mechanical properties include cumulative compressive residual stress (CCRS) and Cumulative Full Width at Half Maximum (CFWHM) as two novel items for researchers, these pioneering and unique conditions present the possibility of acquiring surface charts depicting residual stress distributions, meanwhile Austenite transformation to Martensite due to hard working of SP, Microhardness, and amount of roughness investigated. The effects of SP on these mechanical features were investigated by performing experiments with different parameter combinations and analyzing the results using RSM.

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Effect of Residual Stresses on Fatigue Crack Growth: A Numerical Study Based on Cumulative Plastic Strain at the Crack Tip

Cited by 16 publications

References 48 publications

Residual Stress Analysis of Laser Cladded Commercially Pure Grade Titanium Alloy Plates

Residual Stress Analysis of Laser Cladded Commercially Pure Grade Titanium Alloy Plates

Fatigue assessment of welded joints and crack growth considering residual stress

Optimization of Shot-Peening Parameters for Steel AISI 316L via Response Surface Methodology (RSM): Introducing two novel mechanical aspects

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