Effect of Porosity Content on the Weldability of Powder Metal Parts Produced by Friction Stir Welding

Kurt, Abdullah; Uygur, İlyas; Ateş, Hakan

doi:10.4028/www.scientific.net/msf.534-536.789

Cited by 13 publications

(15 citation statements)

References 5 publications

(6 reference statements)

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“…There have been a number of studies in the literature which have been conducted on the joining of Al and its alloys by FSW. Moreover, studies investigating the complex microstructural aspects and microstructure defects of materials joined by the FSW process continue to be carried out [4][5][6][7][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Effect of welding speed on the mechanical properties and weld defects of 7075 Al alloy joined by FSW

Çevik¹,

Özçatalbaş²,

Gülenç³

2016

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In this study, 7075-T651 Al alloys were joined by friction stir welding (FSW) at a fixed rotational speed and different welding speeds. The stirring tool used in the welding processes was comprised of a shoulder of 20 mm in diameter and modified M6 × 1 HSS hand taps used as pins. The FSW was performed at a rotational speed of 1600 rpm and at welding speeds of 20, 40, and 60 mm min −1 . Mechanical and metallographic tests were carried out on the welded joints and the effects of the welding speed on the mechanical and metallurgical properties of the welded specimens were investigated. Welding speed significantly affected the microstructure and mechanical properties of the joining. Results showed that the average grain size of the weld nugget was reduced as welding speed was increased. In addition, it was found that high welding speed negatively affected the mechanical properties of the weld nugget.K e y w o r d s : FSW, aluminium alloy, mechanical properties, micro defects, microstructure

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Section: Introductionmentioning

confidence: 99%

Effect of welding speed on the mechanical properties and weld defects of 7075 Al alloy joined by FSW

Çevik¹,

Özçatalbaş²,

Gülenç³

2016

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“…Although a large amount of previous studies [6][7][8][9][10][11] on the friction welding of similar and dissimilar materials has been conducted, mechanical properties of the plain carbon steel to stainless steel joint produced by friction welding method have never been reported up-to-date. Thus, the objective of the present work is to examine the mechanical properties and optimal welding conditions of friction welded joints of these materials.…”

Section: Introductionmentioning

confidence: 99%

“…Some of the fusion techniques are applied for various materials [1][2][3]. The typical solid state joining applications of diffusion welding for various content of the aluminum metal matrix composites [4][5][6] and FSW [7] have been studied in details. Welding time, applied load, welding temperature and chemical composition of the steel are some of the key parameters to controlling solid state diffusion welding process.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Microstructural Properties of Friction Welded AISI 304 Stainless Steel to AISI 1060 Steel AISI 1060

Ateş¹,

Kaya²

2014

Archives of Metallurgy and Materials

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Rotary Friction welding is one of the most popular methods of joining similar and dissimilar materials. It is widely used with metals and thermoplastics in a wide variety of aviation, transport and aerospace industrial component designs. This study investigates the influence of friction and upsetting pressures on the hardness, tensile properties and microstructure of the welds. The experimental results showed that as the friction and upsetting pressures increased, the hardness and tensile strength values increased, as well. The tensile fracture of welded joint occurred in the AISI 1060 side. The friction processed joints were evaluated for their integrity and quality aspects by optical and scanning electron microscopy. For the perfect interfacial bonding, sufficient upsetting and friction pressures are necessary to reach the optimal temperature and severe plastic deformation to bring these materials within the attraction range.Keywords: Welding, Mechanical properties, MicrostructureZgrzewanie tarciowe jest jedną z najbardziej popularnych metod łączenia podobnych i odmiennych materiałów. Jest ono powszechnie stosowane do łączenia metali i tworzyw termoplastycznych w szerokim zakresie wzorów części przemysłowych w lotnictwie, transporcie i przemyśle kosmicznym. Celem badań jest określenie wpływu tarcia i nacisków na twardość, właściwości wytrzymałościowe i mikrostrukturę spoiny. Wyniki doświadczalne wykazały, że zewzrostem tarcia i nacisków wzrosła twardość i wytrzymałość na rozciąganie. W trakcie prób rozciągania pękanie następowało po stronie stali AISI 1060. Zgrzewane tarciowo spoiny zostały oceniopne pod względem ich integralności i jakości za pomocą mikroskopii optycznej i skaningowej mikroskopii elektronowej. Dla uzyskania idealnego złączenia materiałów potrzebne są odpowiednie naciski i tarcie, aby osiągnąć optymalną temperaturę i intensywne odkształcenie plastyczne.

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“…Studies regarding the joining of P/M parts are very limited in the literature. In addition, the joining of powder compacts is complicated since they expose great difficulty due to their porous structure and low thermal conductivity compared with bulk metals and alloys 1 . The joining of sintered powders are mostly carried out by low heat input joining methods such as diffusion bonding, sinter joining or brazing to itself or other metals, alloys and ceramics due to metallurgical and dimensional effects of high heat input on sintered powder compacts [2][3][4][5][6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

The effect of voltage on the arc stud welding of microwave sintered Fe+Al powder mixture

Talaş¹,

Doğan²,

Çakmakkaya³

et al. 2014

Mat. Res.

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The joining of powder metallurgy products is of importance because of high demand in many industrial applications. In this study, the effect of welding voltage on the joint quality has been investigated using discharge arc stud welding, a low heat input welding method, without gas protection to join steel stubs to microwave sintered compacts containing a powder mixture of 26 atomic % Al and Fe (balance). It has been shown that welds with steel stubs are prone to side cracking in the weld zone and they also suffer from the oxidation of metal powders adjacent to weld zone. The forms of oxides are continuous and laminar type in welds with steel stubs and the composition of weld zone changes with increasing arc voltage.

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Effect of Porosity Content on the Weldability of Powder Metal Parts Produced by Friction Stir Welding

Cited by 13 publications

References 5 publications

Effect of welding speed on the mechanical properties and weld defects of 7075 Al alloy joined by FSW

Effect of welding speed on the mechanical properties and weld defects of 7075 Al alloy joined by FSW

Mechanical and Microstructural Properties of Friction Welded AISI 304 Stainless Steel to AISI 1060 Steel AISI 1060

The effect of voltage on the arc stud welding of microwave sintered Fe+Al powder mixture

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