Methods for evaluating fracture patterns of polycrystalline materials based on the parameter analysis of ductile separation dimples: A review

Maruschak, Pavlo; Konovalenko, Ihor; Sorochak, Andrii

doi:10.1016/j.engfailanal.2023.107587

Cited by 19 publications

(4 citation statements)

References 69 publications

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“…Such an approach would make it possible to quantify the degree of degradation of steels after their long-term operation based on the quantitative analysis of fractographic digital images of fractures of steel specimens in the initial state and after long-term operation [60]. However, its implementation is impossible without the use of computer processing of fractographic digital images.…”

Section: Discussionmentioning

confidence: 99%

“…Based on even a cursory analysis of the traditional dimple relief of the specimens, it was suggested that both the degradation and hydrogenation of WM can contribute to the separation from the matrix of not only large inclusions but also small ones, leaving only their traces at the bottom of the dimples. This was evidenced by some discrepancy between the number of inclusions and their traces at the bottom of the dimples, observed on Such an approach would make it possible to quantify the degree of degradation of steels after their long-term operation based on the quantitative analysis of fractographic digital images of fractures of steel specimens in the initial state and after long-term operation [60]. However, its implementation is impossible without the use of computer processing of fractographic digital images.…”

Section: Fractographic Features Induced By Operational Degradation An...mentioning

confidence: 99%

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Analysis of Mechanical Properties of Welded Joint Metal from TPP Steam Piping after Its Operational Degradation and Hydrogenation

Hutsaylyuk,

Student,

Maruschak

et al. 2023

Materials

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In this paper, the mechanical properties of various zones of the welded joints of a heat-resistant steel 15Kh1M1F in different states (in the initial state, after an operation on the main steam piping of a thermal power plant (TPP) for 23 years) were determined, and the fracture surfaces were analyzed using scanning electron microscopy (SEM) images. The effect of hydrogen electrolytic charging on mechanical behavior and fracture mechanism was also studied. The long-term operation of welds resulted in a higher degradation degree of the weld metal compared to the base one, indicated by the deterioration of mechanical properties: decrease in hardness, strength characteristics, and reduction in area, which was accompanied by an atypical increase in elongation at fracture. All studied zones of the operated welded joints were characterized by higher hydrogen content, 2.5–3 times higher than that in the initial state. Additional hydrogen charging of the weld joint metal led to a decrease in the strength and ductility characteristics, more significantly for the operated weld compared with the non-operated one. This justified the possibility of using short-term tests of hydrogenated WM in the air to assess the degree of its damage during operation on a steam piping.

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Section: Discussionmentioning

confidence: 99%

Section: Fractographic Features Induced By Operational Degradation An...mentioning

confidence: 99%

Analysis of Mechanical Properties of Welded Joint Metal from TPP Steam Piping after Its Operational Degradation and Hydrogenation

Hutsaylyuk,

Student,

Maruschak

et al. 2023

Materials

Self Cite

View full text Add to dashboard Cite

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Section: Introductionmentioning

confidence: 99%

“…The data science approaches including a convolutional neural network (CNN) and persistent homology (PH) have been applied to the image analyses [46][47][48][49][50][51][52]. A CNN can be used for segmenting or annotating images [46] and predicting the properties related to the images [47]. In addition, gradient-weighted class activation mapping (Grad-CAM) has been used for explaining the CNN predictions with low interpretability [48].…”

Section: Introductionmentioning

confidence: 99%

Persistent Homology Analysis of the Microstructure of Laser-Powder-Bed-Fused Al–12Si Alloy

Suzuki,

Sasa,

Kobashi

et al. 2023

Materials

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The laser powder bed fusion (L-PBF) process provides the cellular microstructure (primary α phase surrounded by a eutectic Si network) inside hypo-eutectic Al–Si alloys. The microstructure changes to the particle-dispersed microstructure with heat treatments at around 500 °C. The microstructural change leads to a significant reduction in the tensile strength. However, the microstructural descriptors representing the cellular and particle-dispersed microstructures have not been established, resulting in difficulty in terms of discussion regarding the structure–property relationship. In this study, an attempt was made to analyze the microstructure in L-PBF-built and subsequently heat-treated Al–12Si (mass%) alloys using the persistent homology, which can analyze the spatial distributions and connections of secondary phases. The zero-dimensional persistent homology revealed that the spacing between adjacent Si particles was independent of Si particle size in the as-built alloy, whereas fewer Si particles existed near large Si particles in the heat-treated alloy. Furthermore, the first principal component of a one-dimensional persistent homology diagram would represent the microstructural characteristics from cellular to particle-dispersed morphology. These microstructural descriptors were strongly correlated with the tensile and yield strengths. This study provides a new insight into the microstructural indices describing unique microstructures in L-PBF-built alloys.

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Experimental and statistical investigation of the impact of laser process parameters on the mechanical properties of H13 tool steel bulk

Baali,

Iltaf,

Dehghan

et al. 2024

Int J Adv Manuf Technol

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Methods for evaluating fracture patterns of polycrystalline materials based on the parameter analysis of ductile separation dimples: A review

Cited by 19 publications

References 69 publications

Analysis of Mechanical Properties of Welded Joint Metal from TPP Steam Piping after Its Operational Degradation and Hydrogenation

Analysis of Mechanical Properties of Welded Joint Metal from TPP Steam Piping after Its Operational Degradation and Hydrogenation

Persistent Homology Analysis of the Microstructure of Laser-Powder-Bed-Fused Al–12Si Alloy

Experimental and statistical investigation of the impact of laser process parameters on the mechanical properties of H13 tool steel bulk

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