The effect of weld parameters on friction stir welding of brass plates

Çam, Gürel; Serіndağ, Hüseyin Tarık; Cakan, Ahmet; Mıstıkoğlu, Selçuk; Yavuz, Hakan

doi:10.1002/mawe.200800314

Cited by 72 publications

(34 citation statements)

References 12 publications

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“…Vickers microhardness measurement method was employed with a load of 100 grams (loading time being 5 seconds) for microhardness measurements. Furthermore, minimum three tensile specimens prepared according to EN 895 were tested for each condition to determine the mechanical performances of the joints obtained as explained in detail in an earlier publication [16]. The results were compared with those obtained from the base plate specimens.…”

Section: Methodsmentioning

confidence: 99%

“…The results were compared with those obtained from the base plate specimens. Moreover, two non-standard bending specimens (20 mm wide and 200 mm long) were also extracted from each welded plate [16]. Both specimens were bended up to 180 o , one specimen with weld root being outside and the other with weld root inside, to determine whether cracking occurs or not in both bending conditions.…”

Section: Methodsmentioning

confidence: 99%

“…Table 2 shows the mechanical properties of the plate used. Friction stir welding of the plates was conducted using a vertical-spindle type milling machine [16].…”

Section: Methodsmentioning

confidence: 99%

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Mechanical properties of friction stir butt‐welded Al‐5086 H32 plate

Çam¹,

Güçlüer

Cakan

et al. 2009

Materialwissenschaft Werkst

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Al-5086 H32 plates with a thickness of 3 mm were friction stir butt-welded using different welding speeds at a tool rotational speed of 1600 rpm. The effect of welding speed on the weld performance of the joints was investigated by conducting optical microscopy, microhardness measurements and mechanical tests (i.e. tensile and bend tests). The effect of heat input during friction stir welding on the microstructure, and thus mechanical properties, of cold-rolled Al-5086 plates was also determined.The experimental results indicated that the maximum tensile strength of the joints, which is about 75 % that of the base plate, was obtained with a traverse speed of 200 mm/min at the tool rotational speed used, e.g. 1600 rpm, and the maximum bending angle of the joints can reach 180 o . The maximum ductility performance of the joints was, on the other hand, relatively low, e.g. about 20 %. These results are not unexpected due to the loss of the cold-work strengthening in the weld region as a result of the heat input during welding, and thus the confined plasticity within the stirred zone owing to strength undermatching. Higher joint performances can also be achieved by increasing the penetration depth of the stirring probe in butt-friction stir welding of Al-5086 H32 plates.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Mechanical properties of friction stir butt‐welded Al‐5086 H32 plate

Çam¹,

Güçlüer

Cakan

et al. 2009

Materialwissenschaft Werkst

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“…Despite a vast investigation in the field of copper FSW, the studies in the case of brasses are somewhat limited [15][16][17][18][19][20][21]. Xie et al [18,19] reported that partial recrystallization occurred during FSW on 5 mm thick 62/38 brass plates, which forms different types of grains including recrystallized, deformed recrystallized and deformed grains in the SZ of the joints.…”

Section: Introductionmentioning

confidence: 97%

A comparative study of microstructure and mechanical properties between friction stir welded single and double phase brass alloys

Heidarzadeh

Saeid

2016

Materials Science and Engineering: A

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Defect formation and microstructural changes in friction stir welds between pure copper and a brass alloy

et al. 2009

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Several attempts have been made in the last few years for joining similar pure copper [1,2] and brass alloys [3,4] using the solid state friction stir welding (FSW) process. For both material types, all the works performed reported that the production of defect free welds is largely dependent on the correct choice of process parameters. It was also observed that, despite grain refinement occurred in the centre of all the welds, the welds in copper showed a slight reduction in strength, when compared to that of the base material, as opposed to welds in brass alloys, for which an increase in strength was observed. Regardless of the encouraging results obtained in similar FWS of these materials, in the knowledge of the authors, few reports exist concerning dissimilar joints between them. In his work, dissimilar welds between Cu DHP cooper plates and Cu-Zn 37 brass plates, both of 1 mm thickness, with the brass plate positioned in the advancing side of the tool, were analysed. Welds were carried out with a solid tool made of high speed steel. Tool geometry was characterized by a tool shoulder of 10 mm in diameter, containing a conical cavity of 6 degrees, and a threaded probe of 3 mm in diameter. Welds were done in a milling machine, in position control, using the working parameters indicated in table 1. Though the welds obtained displayed good surface appearance, see Fig. 1, optical microscopy revealed the existence of large voids in the stirred zone, close to the brass alloy side of the weld, as shown in Fig. 2. Fig. 2 illustrates a cross section of a weld selectively etched with convenient reagents, displaying cooper material on the right side and brass alloy on the left. Magnifications of the main zones of the weld are also depicted in the same figure. In this figure it is possible to observe a narrow zone where the grains suffered significant plastic deformation due to the action of the rotating tool. In fact, at the centre of the weld, copper and brass were submitted to large plastic deformations following complex strain paths. Copper was drawn from the retreating to the advancing side of the weld by the action of the tool shoulder but the combination of the effects of shoulder and probe was not enough to fill the groove created by the probe. A very fine "equiaxial" grain structure was observed in the central zone of the welds; this zone is currently named nugget. In order to verify if there is an effective mixture of both materials in this zone an electron probe micro analysis of copper and zinc was also done in the nugget, in the transition between booth materials, as shown in Fig. 3. This figure shows that there is not an effective mixture of both materials in the nugget. These results suggest that an insufficient plasticization of both materials happened during welding.

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The effect of weld parameters on friction stir welding of brass plates

Cited by 72 publications

References 12 publications

Mechanical properties of friction stir butt‐welded Al‐5086 H32 plate

Mechanical properties of friction stir butt‐welded Al‐5086 H32 plate

A comparative study of microstructure and mechanical properties between friction stir welded single and double phase brass alloys

Defect formation and microstructural changes in friction stir welds between pure copper and a brass alloy

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