Effect of welding parameters on microstructure in the stir zone of FSW joints of aluminum die casting alloy

Kim, Y.G.; Fujii, Hidetoshi; Tsumura, Takuya; Komazaki, T.; Nakata, Kohei

doi:10.1016/j.matlet.2006.03.123

Cited by 93 publications

(67 citation statements)

References 5 publications

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“…These materials must have specific qualities such as weight reduction with development in reduction of emissions, improvement comfort, impact resistance, security and energy efficient in terms of reducing fuel consumption. Aluminum Matrix Composite (AMCs) is one of the best options as capable candidate material which has great potential due to diverse features that make them attractive for automotive applications such as low density good corrosion resistance, low thermal expansion and established casting techniques for mass production [1][2][3]. SiC, Al 2 O 3 , SiO 2 , BN, and graphite are particles reinforcement that can be used usually in AMCs.…”

Section: Introductionmentioning

confidence: 99%

Wear Resistance Analysis of A359/SiC/20p Advanced Composite Joints Welded by Friction Stir Welding

Mata¹,

Pérez²,

Medina³

et al. 2016

Soldag. insp.

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Advancement in automotive part development demands new cost-effective materials with higher mechanical properties and improved wear resistance as compared to existing materials. For instance, Aluminum Matrix Composites (AMC) shows improved mechanical properties as wear and abrasion resistance, high strength, chemical and dimensional stability. Automotive industry has focused in AMC for a variety of applications in automotive parts in order to improve the fuel economy, minimize vehicle emissions, improve design options, and increase the performance. Wear resistance is one of the most important factors in useful life of the automotive components, overall in those components submitted to mechanical systems like automotive brakes and suspensions. Friction Stir Welding (FSW) rises as the most capable process to joining AMC, principally for the capacity to weld without compromising their ceramic reinforcement. The aim of this study is focused on the analysis of wear characteristics of the friction-stir welded joint of aluminum matrix reinforced with 20 percent in weight silicon carbide composite (A359/SiC/20p). The experimental procedure consisted in cut samples into small plates and perform three welds on these with a FSW machine using a tool with 20 mm shoulder diameter and 8 mm pin diameter. The wear features of the three welded joints and parent metal were analyzed at constant load applying 5 N and a rotational speed of 100 rpm employing a Pin-on -Disk wear testing apparatus, using a sapphire steel ball with 6 mm diameter. The experimental results indicate that the three welded joints had low friction coefficient compared with the parent metal. The results determine that the FSW process parameters affect the wear resistance of the welded joints owing to different microstructural modifications during welding that causes a low wear resistance on the welded zone. Key-words:Aluminum matrix composites; Friction stir welding; Wear. Análise da Resistência ao Desgaste de Juntas de Compostos Avançados A359/SiC/20p Soldadas por FricçãoResumo: O avanço no desenvolvimento de peças automotivas exige novos materiais de baixo custo com propriedades mecânicas superiores e com maior resistência ao desgaste em comparação com os materiais existentes. Por exemplo, compósitos com matriz de alumínio (AMC) mostram melhores propriedades mecânicas como resistência à abrasão e ao desgaste, alta resistência e estabilidade química e dimensional. A indústria automotiva tem centrado em AMC para uma variedade de aplicações em peças automotivas, a fim de melhorar a economia de combustível, minimizar as emissões dos veículos, melhorar as opções de design e aumentar o desempenho. A Resistência ao desgaste é um fator importante a determinar para a vida útil dos componentes automotivos, em geral naqueles componentes submetidos a sistemas mecânicos como freios e suspensões. O processo de soldagem por fricção e mistura mecânica (FSW -Friction Stir Welding) surge como um processo capaz de unir AMC, principalmente com a capacidade de soldar se...

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Section: Introductionmentioning

confidence: 99%

Wear Resistance Analysis of A359/SiC/20p Advanced Composite Joints Welded by Friction Stir Welding

Mata¹,

Pérez²,

Medina³

et al. 2016

Soldag. insp.

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“…* Research presented in this paper is a part of works on the assessment of the impact of welding conditions on a weld quality while welding using conventional milling machines. Issues of the FSW welding are under the development at various research centres [5,6,7].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Properties of Friction Stir Butt-Welded Magnesium Casting Alloys

Miara¹,

Pietras²,

Mroczka³

2011

Archives of Metallurgy and Materials

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The article presents results of testing the quality of FSW welded joints made in plates of various magnesium casting alloys, including MCMgAl9Zn1 (AZ91), MCMgRe3Zn2Zr (ZRE1), MCMgRe2Ag2Zr (MSR-B) and MCMgY4Re3Zr (WE43). In this paper, all results for magnesium casting alloy AZ91 are presented, whereas for other alloys (ZRE1, MSR-B and WE43) only selected testing results for best parameters have been chosen and shown. Butt joints were produced on the friction welding machine built on the base of the conventional vertical milling machine. Quality assessment included the visual inspection, temperature measurements in welding region, tensile strength testing, analysis of the weld structure, hardness, weld force and torque measurements. Research aimed at the recognition of the FSW abilities to weld cast magnesium alloys, the influence of the welding conditions on the welds' properties as well as their structures. The research results have revealed that cast magnesium alloys are weldable using FSW process -it is possible to produce joints of very good quality in relatively narrow range of parameters and the strength of the joints is satisfactory. In order to acquire joints of the best quality it is recommended that workpieces should be rigidly clamped and the welding speed should be limited. The best mechanical properties have been obtained for friction with rotation speed of 355 rpm.Keywords: friction stir welding, FSW welding, cast magnesium alloy W artykule przedstawiono wyniki badań jakości złączy, wykonanych metodą zgrzewania tarciowego z mieszaniem materiału zgrzeiny (FSW), odlewniczych stopów magnezu MCMgAl9Zn1 (AZ91), MCMgRe3Zn2Zr (ZRE1), MCMgRe2Ag2Zr (MSR-B), MCMgY4Re3Zr (WE43). Złącza wykonywano na zgrzewarce zbudowanej na bazie frezarki konwencjonalnej. Ocenę jakości złączy przeprowadzono w oparciu o badania wizualne, pomiary temperatury obszaru zgrzewania, badania szczelności złączy metodą penetracyjną, badania wytrzymałości na rozciąganie, analizę budowy strukturalnej zgrzein, badania twardości. Celem badań było poznanie możliwości zgrzewania FSW odlewniczych stopów magnezu, wpływu warunków zgrzewania na własności złączy oraz budowę strukturalną zgrzein. Wyniki badań wskazują na dobrą zgrzewalność odlewniczych stopów magnezu metodą FSW -poprawne złącza można uzyskać w stosunkowo wąskim zakresie parametrów zgrzewania, a wytrzymałość tych złączy jest zadowalająca. W celu uzyskania złączy o najwyższej jakości elementy muszą być dociśnięte do siebie, a proces zgrzewania nie może być prowadzony z nadmierną prędkością. Najlepsze własności wytrzymałościowe uzyskano prowadząc proces tarcia z prędkością obrotową narzędzia 355 obr/min.

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“…From the experiments it was concluded that TFC tool (tool with fillet and cavity) crown is the best in terms of crown quality. Fujii H., et al (2006)studied the effect of tool shape of friction stir welded aluminum alloys. Boz M. & Kurt A.…”

Section: Introductionmentioning

confidence: 99%

“…Rodrigues D. M., et al (2008) studied the influence of Friction Stir Welding Parameters on the Micro-structural and Mechanical properties of AA 6016-T4 Thin Welds: In this present work friction stir welds produced in 1 mm thick plates of AA6016-T4 aluminum alloy, with two different tools, were analyzed and compared concerning the micro-structure and mechanical properties. Kim Y.G., et al (2006) The objective of the present study is to clarify dominant micro-structural factors governing the global tensile properties of the welded joint by estimation of the distribution of the local tensile properties in the joint including extensive regions from the stir zone to the unaffected base material region. In this study an extruded 6063-T5 Al, 4 mm thickness plates were friction stir welded keeping the travel speed and the tool shoulder diameter were 10 mm/s and 15 mm respectively.…”

Section: Introductionmentioning

confidence: 99%

Effect of Tool Geometry on Mechanical and Micro-structural properties of Friction Stir Welding of Al-alloy

Parida¹

2010

Int.J.of Curr. Engg. and Technol

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Effect of welding parameters on microstructure in the stir zone of FSW joints of aluminum die casting alloy

Cited by 93 publications

References 5 publications

Wear Resistance Analysis of A359/SiC/20p Advanced Composite Joints Welded by Friction Stir Welding

Wear Resistance Analysis of A359/SiC/20p Advanced Composite Joints Welded by Friction Stir Welding

Microstructure and Properties of Friction Stir Butt-Welded Magnesium Casting Alloys

Effect of Tool Geometry on Mechanical and Micro-structural properties of Friction Stir Welding of Al-alloy

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