Compact crack arrest testing and analysis of EH47 shipbuilding steel

Taylor, Jessica; Mehmanparast, Ali; Kulka, Rob; Moore, Philippa; Farrahi, G.H.; Xu, Liuxiong

doi:10.1016/j.tafmec.2021.103004

Cited by 9 publications

(7 citation statements)

References 33 publications

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“…In recent years, container ships are required to have a larger carrying capacity to meet the requirements of improving transportation efficiency and reducing carbon emissions [1][2][3]. The increase in the structure of container ships has led to the application of largethickness and high-strength steel plates in local special parts such as the hatch side coaming, upper deck and sheer strakes to satisfy the local high-stress conditions [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…The use of high-strength thick plates increases the risk of brittle fracture and brings potential safety hazards for ships operating in bad weather or accidental damage [1]. Therefore, the E-class ship plate steel with excellent toughness should be preferentially selected for important parts, which can effectively prevent the propagation of micro-cracks and ensure safety [1,4,5]. Studies have shown that the excellent balance of strength and toughness of E-class ship plate steel will be disrupted after high-temperature thermal cycles during welding [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…The increase in the structure of container ships has led to the application of large-thickness and high-strength steel plates in local special parts such as the hatch side coaming, upper deck and sheer strakes to satisfy the local high-stress conditions [2,3]. The use of high-strength thick plates increases the risk of brittle fracture and brings potential safety hazards for ships operating in bad weather or accidental damage [1]. Therefore, the E-class ship plate steel with excellent toughness should be preferentially selected for important parts, which can effectively prevent the propagation of micro-cracks and ensure safety [1,4,5].…”

Section: Introductionmentioning

confidence: 99%

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Effect of post-heat treatment on microstructure and properties of EH47 steel CGHAZ

Yang

et al. 2023

Materials Science and Technology

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To clarify the effect of post-heat treatment on the microstructure and mechanical properties of the coarse-grained heat-affected zone (CGHAZ) for EH47 steel, simulated CGHAZ specimens were subjected to post-heat treatment at 250°C for 1.0 h. The results showed that the microstructure of CGHAZ was composed of granular bainite (GB) and lath bainite (LB), and a large number of iron-carbon particles (∼81 nm) were precipitated after post-heat treatment. The relationship between dislocations, low-angle grain boundaries and iron-carbon particles was revealed by KAM values. The iron-carbon particles hindered the movement of sub-grain boundaries and dislocations, thereby increased the yield strength (∼120 MPa). The precipitation of iron-carbon particles caused the cracking of bainite ferrite and reducing the fracture toughness of CGHAZ.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of post-heat treatment on microstructure and properties of EH47 steel CGHAZ

Yang

et al. 2023

Materials Science and Technology

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“…In-service failure of M24 bolts can often start from initial defects of metallurgical origin caused by non-metallic impurities. These initial defects during the life of the bolt (mileage ran) increase in number and size, which can later lead to breakage.Non-metallic impurities play a decisive role in the appearance of microcracks(Taylor et. al., 2021), which in turn can lead to the appearance of macrocracks and, consequently, the disintegration of bolts.…”

mentioning

confidence: 99%

Comparative Analysis of Two Steel Grades 41cr4 and P355nl1 for Winter Operating Conditions

Gorbacovs,

Gavrilovs,

Eiduks

2024

Rural Development 2019

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One of the main criteria for the quality of steels is the ability to resist brittle fracture. This ability is qualitatively expressed in the value of impact strength and toughness. According to the statistical data at AS "Pasažieru vilciens", at low temperatures, the number of failures of the M-24 bolts for fastening the rubber-cord coupling increases. In this regard, the urgent task is to reduce the number of failures during the winter. The article presents the results of tests of impact strength and toughness, as well as a metallographic analysis of two steel grades 41Cr4 and P355NL1. Also an experiment was carried out, on the basis of which the main conclusions were made on the mechanical properties of two grades of steel 41Cr4 and P355NL1.

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“…3.27. Under exposure to significant fluctuating and shock and impact loads, the hardening capacity of the material is exhausted, and the bolt material may be subjected to fatigue loads, resulting in periodic spalling of the top surface layer [15]- [16].…”

Section: A Review Of the Nature And Cause Of Rubber-cord Coupling Fas...mentioning

confidence: 99%

Failure Study of Rubber-Cord Flexible Couplings and their Mounting Bolts

Gorbačovs

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In the Thesis the methodology was developed for preventing the failure of the rubber-cord coupling and its fastening bolts. The methodology was tested on rubber-cord couplings, which are widely used in railway rolling stock. Statistics of failures of rubber-cord couplings and their fastening bolts were collected and studied in detail. The data on pitch angles of rubber-cord coupling was aggregated. One-sided stretching tests of various rubber-cord coupling samples were performed in the RTU laboratory. Load deformation graphs were obtained and the causes of the rubber-cord coupling bolts damage were clarified. Calculations were made using the SolidWorks software, and the search for loads affecting the occurrence of defects in the rubber-cord coupling shell was carried out.

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Compact crack arrest testing and analysis of EH47 shipbuilding steel

Cited by 9 publications

References 33 publications

Effect of post-heat treatment on microstructure and properties of EH47 steel CGHAZ

Effect of post-heat treatment on microstructure and properties of EH47 steel CGHAZ

Comparative Analysis of Two Steel Grades 41cr4 and P355nl1 for Winter Operating Conditions

Failure Study of Rubber-Cord Flexible Couplings and their Mounting Bolts

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