Temperature distribution and structure in the heat-affected zone for steel sheets after laser cutting

Гвоздев, А. Е.; Sergeyev, N. N.; Minayev, I. V.; Колмаков, А. Г.; Тихонова, И. В.; Sergeyev, A. N.; Provotorov, D. A.; Khonelidze, D. M.; Maliy, D. V.; Golyshev, I. V.

doi:10.1134/s2075113317010178

Cited by 21 publications

(2 citation statements)

References 1 publication

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“…The plasma cut technique uses plasma in argon atmosphere, which results in a gaussian temperature distribution at the surface of the workpiece, similar to the ones obtained during arc welding. On the other hand, in laser cutting a focused laser beam is used, resulting in a much more limited HAZ [44].…”

Section: Hole Surface Evaluationmentioning

confidence: 99%

Influence of hole-making procedures on fatigue behaviour of high strength steel plates

Jiménez-Peña

Goulas

Rossi

et al. 2019

Journal of Constructional Steel Research

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High strength steels (HSS) offer a unique opportunity to reduce the weight of civil and off-shore structures and heavy-duty machinery. Such equipment is subjected to continuous cyclic loading and therefore fatigue failure often happens where concentrations of stresses are present, the latter most of the time being caused by connection details. Previous studies have demonstrated that an increase in yield strength does not lead to a proportional increase in fatigue resistance, particularly in welded connections. In that regard, the utilisation of bolted joints is often proposed as an alternative to welded joints. The hole-making procedure is an essential factor in the assessment of the fatigue resistance of bolted joints, since different hole-making techniques yield different surface qualities and residual stresses, which consequently impact the final fatigue limit. This work addresses the effect of the main mechanical (punching, drilling and waterjet) and thermal (plasma and laser) cutting techniques on the fatigue performance of HSS plates containing holes.A series of fatigue tests with moderately thick plates made of S500MC were carried out using different hole-making techniques. The surface, geometry and residual damage of every hole-making procedure were studied by means of optical evaluation, hardness tests and roughness evaluation, and large differences were observed: drilling was found to produce the most geometrically accurate hole and the smoothest surface finish; while laser and waterjet cutting displayed the best fatigue 2 performance. The results of this research can provide an estimation of the applicability of each holemaking process to this particular HSS grade.

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Section: Hole Surface Evaluationmentioning

confidence: 99%

Influence of hole-making procedures on fatigue behaviour of high strength steel plates

Jiménez-Peña

Goulas

Rossi

et al. 2019

Journal of Constructional Steel Research

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show abstract

“…Various AE parameters can be used to characterize the damage like AE Hits, AE energy, signal rise time, etc. In the last 10 decades, AE has exhibited extensive capability for assessing damage and deterioration in various types of structure 40–42 . It has shown promising results for detecting consequences of corrosion in steel on the surrounding concrete at early stages along with its progression 43–46 (Ohtsu & Tomoda, 2008; Aldahdooh, Bunnori, & Megat Johari, 2013; Ohtsu, 2015; Prem & Murthy, 2017) 47–50 .…”

Section: Introductionmentioning

confidence: 99%

Monitoring the flexural performance of GFRP repaired corroded reinforced concrete beams using passive acoustic emission technique

Garhwal

Sharma

2020

Structural Concrete

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The focus of the research is to evaluate the flexural behavior and performance of glass fiber reinforced polymer (GFRP) repaired reinforced concrete (RC) beams corroded to different levels using acoustic emission (AE) techniques. A significant improvement in the flexural characteristics of the GFRP repaired corroded beams is observed with a change in failure mode from brittle to ductile. The benefits of GFRP repair in corroded RC beams are further clearly demonstrated by AE monitoring parameters of cumulative AE hits and their amplitudes. A significant improvement in the number of AE hits and the reappearance of AE cracking phases after repair of corroded beams indicate the efficiency of AE technique to monitor repaired structures also. A pictorial representation of the development of microcracks beneath the surface of concrete and GFRP to the formation of macrocracks is well demonstrated in an AE event plot. The assessment of local damage in RC beams using AE techniques subjected to simultaneous loading and corrosion and their further repair would facilitate in‐situ nondestructive evaluation of actual RC structures in future for detecting damage beneath the surface even after FRP repair.

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Study on ultrasonic-assisted WECDM of quartz wafer with continuous electrolyte flow

Yang

Tsui

2021

Int J Adv Manuf Technol

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Temperature distribution and structure in the heat-affected zone for steel sheets after laser cutting

Cited by 21 publications

References 1 publication

Influence of hole-making procedures on fatigue behaviour of high strength steel plates

Influence of hole-making procedures on fatigue behaviour of high strength steel plates

Monitoring the flexural performance of GFRP repaired corroded reinforced concrete beams using passive acoustic emission technique

Study on ultrasonic-assisted WECDM of quartz wafer with continuous electrolyte flow

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