Effect of welding speed on friction stir welds of GL E36 shipbuilding steel

Cunha, Pedro Henrique Costa Pereira da; Lemos, Guilherme Vieira Braga; Bergmann, Luciano; Reguly, Afonso; Santos, Jorge F. dos; Marinho, Ricardo Reppold; Paes, Marcelo Torres Piza

doi:10.1016/j.jmrt.2018.07.014

Cited by 29 publications

(10 citation statements)

References 29 publications

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“…Based on the existing literature [20][21][22][23][24][25][26][27], works on other steel joint features such as flash, bonded and nugget width and resistance of weld nugget to crack initiation and failure are major research windows that have not been exploited. This present study attempts to examine some of the aforementioned areas by conducting FSSW on a low-carbon steel sheet with a thickness of 1.2 mm, which is the most current steel in Iran's auto industry for making car body.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of autobody steel joined by friction stir spot welding

et al. 2019

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This work investigates the microstructural features and mechanical properties of joints of lowcarbon steel friction stir spot welded by changing tool rotational speed and dwell time. Microstructural evaluation, peeling, tension-shear and micro-hardness tests were employed to characterize the properties of the welded joints. The results show that an increase in the tool rotational speed promotes the formation of more weld flash, and it equally changes the flash morphology from ring flash to a combination of ring and serrated flashes. A fine immediate tool contact region is formed in the stir zone (SZ) and the width of the ITCR increases with the tool rotational speed and tensile-shear failure load. Besides the ITCR, the SZ uniquely consists of the shoulder undersurface region (SZ I) and vortex region (SZ II) with average grain sizes of about 10.9 and 16.66 lm, respectively. An increase in tool rotational speed improves the micro-hardness, and the average diameter of the weld nugget (from 4.5 to 5.5 mm). Base metal-nugget interface failure (650 rpm) and base metal neckinginduced failure (1250 rpm) are the two forms of weld failure obtained in the welded samples.

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Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of autobody steel joined by friction stir spot welding

et al. 2019

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“…16g. In published literature [20,52,54,55], it was reported that the tool wear rate decreased with an increase in traverse speed and decrease in tool rotational speed, which suggests that the tool life can be improved by adjusting the welding parameters. The relative hardness of the tool and workpiece material at welding temperature conditions significantly affected the tool wear [21,52].…”

Section: Microstructure and Mechanical Propertiesmentioning

confidence: 99%

A three-dimensional heat transfer modelling and experimental study on friction stir welding of dissimilar steels

Pankaj

Tiwari

Biswas

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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In this research, numerical as well as experimental analysis on friction stir welding (FSW) of dissimilar steels, i.e. DH36 steel and AISI 1008 steel, was performed. A 3D heat transfer FE model based on Abaqus/CAE using Fortran code via DFLUX subroutine was developed to investigate the effect of FSW parameters (i.e. rotational speed and traverse speed) on temperature distribution during the welding. It was observed that decreasing the traverse speed, increasing the rotational speed and shoulder diameter enhanced the peak temperature due to higher heat input. Based on the experimentally obtained sound quality welding parameters, the FE model was successfully validated with a maximum percentage error of 5.57% for peak temperature. Experimental results revealed that the higher heat generation reduced the grain size by increasing the rotational speed and decreasing the traverse speed. The inhomogeneous hardness distribution was observed across the weld cross section due to grain size variation. The higher grain refinement at a rotational speed of 600 rpm with a traverse speed of 70 mm/min produced the maximum value of the hardness and impact toughness. The tensile weld samples were fractured in the base metal zone (i.e. AISI 1008 steel) and experienced the tensile strength within the range of the AISI 1008 steel. The microstructure in the SZ exhibited the Widmanstatten ferrite in AISI 1008 steel and acicular-shaped bainite ferrite in DH36 steel. EDS analysis of the fractured surface of impact specimens confirmed the embedment of tungsten carbide particles in the weld zone due to the tool wear.

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“…При сварке же стальных сплавов температура может достигать 800 С [11]. При использовании стандартной схемы сварки трением с перемешиванием (рис.…”

Section: для цитированияunclassified

Special features of friction stir welding dissimilar joints

Chernykh¹,

Vasiliev²,

Dylchenko³

et al. 2019

OSB

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и. К. черных е. в. ваСильев р. в. ДыльченКо ю. е. жДанова Б. К. игиСенов Омский государственный технический университет, г. Омск оСоБенноСТи СварКи разнороДных меТаллов меТоДом СварКи Трением С перемешиванием В статье представлены некоторые особенности образования сварных соединений различных систем металлов для стыковых и нахлесточных соединений. Рассмотрена схема образования стыкового соединения алюминиевых сплавов со сталью со смещением инструмента. Проведен анализ качества и структуры швов, полученных согласно данной схеме. Исследован микрошлиф полученного образца сварного шва алюминиевого сплава АМГ6 с нержавеющей сталью 12Х18Н10Т толщиной 2 мм при частоте вращения инструмента 500 об/мин и подаче 50 мм/мин со смещением инструмента на 0,2 мм в стальную заготовку. В ядре шва наблюдается взаимное проникновение металлов на глубину до 3,2 мм и стальные включения в алюминиевом сплаве размером до 0,3 мм. Ключевые слова: сварка трением с перемешиванием, фрикционная сварка, сварка разнородных металлов, алюминиевые сплавы, нержавеющая сталь, структура сварного шва.

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Effect of welding speed on friction stir welds of GL E36 shipbuilding steel

Cited by 29 publications

References 29 publications

Microstructure and mechanical properties of autobody steel joined by friction stir spot welding

Microstructure and mechanical properties of autobody steel joined by friction stir spot welding

A three-dimensional heat transfer modelling and experimental study on friction stir welding of dissimilar steels

Special features of friction stir welding dissimilar joints

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