Effect of tool pin profile on friction stir butt welding of high-zinc brass (CuZn40)

Emamikhah, Afshin; Abbasi, Alireza; Atefat, Ali; Givi, Mohammad Kazem Besharati

doi:10.1007/s00170-013-5480-1

Cited by 36 publications

(20 citation statements)

References 14 publications

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“…The existence of this difference between the tensile shear forces is due to the manner of the upward material flow during friction-stir spot welding using two different pin designs. 16,28 As it can be seen in the cross-sectional microstructure in Figure 6, there are three characteristic regions: a completely bonded region, a partially bonded region and an unbounded region, which are in sequence from the weld keyhole towards the base metal. These regions were fully described elsewhere.…”

Section: Effect Of Welding Parameters On the Tensile Shear Strengthmentioning

confidence: 99%

Effect of tool geometry and welding parameters on the microstructure and static strength of the friction-stir spot-welded DP780 dual-phase steel sheets

Abedini¹,

Ranjbarnodeh²,

Marashi³

2017

Mater. Tehnol.

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In this study, friction-stir spot welding is performed on DP780 dual-phase steel sheets to investigate the effect of the tool geometry and welding parameters on the static strength, the failure mode and the microstructure of the welds. First, the effects of two different parameters, the tool plunge depth and the tool holding time, were evaluated, where the tool penetration varied between 1.9-2.8 mm and the dwell time between 8-16 s. The tensile shear strength was first increased with the tool penetration and then decreased, while a longer tool holding time increased the tensile shear strength of the joints. Next, welds were made to compare the effects of two tool geometries, i.e., the conventional tapered pin and the triangular pin, on the hook shape, microstructure and static strength. The difference in the hook geometry led to differences in the tensile shear strength of the welds. The static strength of the welds made with the triangular pin was higher than that obtained using the tapered pin. Keywords: friction-stir spot welding, tool geometry, static strength, dual-phase steel, microstructure V {tudiji je izvedeno torno vrtilno to~kovno varjenje na DP780 dvofazni jekleni plo~evini, z namenom raziskave vpliva geometrije orodja in varilnih parametrov na stati~no trdnost, tip po{kodbe in mikrostrukturo zvarov. Najprej so bili ocenjeni u~inki dveh razli~nih parametrov, globine penetriranja in~asa zadr`anja orodja. Globina je variirala med 1,9 mm in 2,8 mm in zadr`evalni~as med 8 s in 16 s. Natezna stri`na trdnost se je s pove~anjem globine penetracije najprej zvi{ala, nato pa zni`ala, medtem ko je~as zadr`evanja orodja pove~al natezno stri`no trdnost zvarov. Izdelani so bili tudi zvari, na katerih se je dolo~il vpliv geometrije orodja, klasi~nega polkro`nega in trikotnega profila, na obliko, mikrostrukturo in trdnost zvarov. Stati~na trdnost zvarov, narejenih z orodjem trikotnega profila, je bila vi{ja kot tista, pridobljena s polkro`no obliko.

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Section: Effect Of Welding Parameters On the Tensile Shear Strengthmentioning

confidence: 99%

Effect of tool geometry and welding parameters on the microstructure and static strength of the friction-stir spot-welded DP780 dual-phase steel sheets

Abedini¹,

Ranjbarnodeh²,

Marashi³

2017

Mater. Tehnol.

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“…Some studies on joining of brass using FSW were reported in the literature [4][5][6][7][8][9][10]. Park et al [4] joined 2-mm-thick Cu-40Zn brass and reported the microstructural evolution.…”

Section: Introductionmentioning

confidence: 99%

Application of Color Metallography to Study the Microstructure of Friction Stir-Welded Dual-Phase Brass Using Various Etchants

Dinaharan

Akinlabi

2017

Metallogr. Microstruct. Anal.

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Brass is difficult to join using conventional fusion welding processes due to the loss of zinc during fusion. The relatively new friction stir welding (FSW) is a promising process to join brass without loss of zinc. The aim of the present work is to join 6-mm-thick Cu-38.55Zn brass using FSW and investigate the microstructure using color metallography. Two color etchants, namely Beraha 13a and Beraha 12a, were used to reveal the microstructure. The welded joints showed various zones due to the application of frictional heat and severe plastic deformation. The microstructure of heat affected zone was identical to that of base metal. The weld zone consisted of fine equiaxed grains due to dynamic recrystallization. Partial crystallization was observed along the thickness direction in the weld zone. The micrographs obtained using Beraha 12a etchant were better to that of Beraha 13a etchant.

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“…Furthermore, it is notable that the zinc vapor is toxic and can be harmful to the health of welding operators [15,16]. It seems that FSW could be a good alternative to overcome the problems arising from conventional fusion welding of brass alloys.…”

Section: Introductionmentioning

confidence: 99%

“…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: 99%

See 1 more Smart Citation

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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Effect of tool pin profile on friction stir butt welding of high-zinc brass (CuZn40)

Cited by 36 publications

References 14 publications

Effect of tool geometry and welding parameters on the microstructure and static strength of the friction-stir spot-welded DP780 dual-phase steel sheets

Effect of tool geometry and welding parameters on the microstructure and static strength of the friction-stir spot-welded DP780 dual-phase steel sheets

Application of Color Metallography to Study the Microstructure of Friction Stir-Welded Dual-Phase Brass Using Various Etchants

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

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