Response of CMT Welded Aluminum AA5086-H111 to AA6061-T6 Plate with AA4043 Filler for Ballistic

Srikanth, T.; Surendran, S.; Balaganesan, G.; Manjunath, G.L.

doi:10.1016/j.proeng.2017.08.180

Cited by 9 publications

(3 citation statements)

References 14 publications

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“…This process provides excellent bead quality, lower heat input, the negligible amount of spatter, high cladding efficiency, a substantial reduction in the material wastage, highly energy-efficient, competent of fabricating large complex geometries/shapes at a very low cost of production which acts as a boon for the manufacturing sector. 3,[5][6][7][8][9][10] CMT eliminates the problem incurred in GMAW process during the conventional short-circuiting process such as unstable process behavior, severe spatter formation, high heat input and higher distortion. WAAM technique was presented as a unique low-cost solution for the manufacture of large structural components for the aerospace manufacturing industries.…”

Section: Introductionmentioning

confidence: 99%

Control of humping phenomenon and analyzing mechanical properties of Al–Si wire-arc additive manufacturing fabricated samples using cold metal transfer process

Koli

Yuvaraj

Aravindan

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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Nowadays, rapid prototyping is an emerging trend that is followed by industries and auto sector on a large scale which produces intricate geometrical shapes for industrial applications. The wire arc additive manufacturing (WAAM) technique produces large scale industrial products which having intricate geometrical shapes, which is fabricated by layer by layer metal deposition. In this paper, the CMT technique is used to fabricate single-walled WAAM samples. CMT has a high deposition rate, lower thermal heat input and high cladding efficiency characteristics. Humping is a common defect encountered in the WAAM method which not only deteriorates the bead geometry/weld aesthetics but also limits the positional capability in the process. Humping defect also plays a vital role in the reduction of hardness and tensile strength of the fabricated WAAM sample. The humping defect can be controlled by using low heat input parameters which ultimately improves the mechanical properties of WAAM samples. Two types of path planning directions namely uni-directional and bi-directional are adopted in this paper. Results show that the optimum WAAM sample can be achieved by adopting a bi-directional strategy and operating with lower heat input process parameters. This avoids both material wastage and humping defect of the fabricated samples.

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Section: Introductionmentioning

confidence: 99%

Control of humping phenomenon and analyzing mechanical properties of Al–Si wire-arc additive manufacturing fabricated samples using cold metal transfer process

Koli

Yuvaraj

Aravindan

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Compared with the high-energy beam and powder additive manufacturing [2,3], WAAM has a high forming efficiency, a high density of stacking body; compared with traditional forming methods (casting or forging) [4,5], WAAM has the characteristics of Buy-to-Fly ratio, excellent mechanical properties and short processing cycle. The cold metal transfer (CMT) technology has a high cladding efficiency, a low heat input, and no spatter [6,7]. Its application in the…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Input on Formability, Microstructure, and Properties of Al–7Si–0.6Mg Alloys Deposited by CMT-WAAM Process

Wang³

et al. 2019

Applied Sciences

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In order to improve the forming efficiency of Al–7Si–0.6Mg fabricated by wire and arc additive manufacturing process (WAAM), wire with a diameter of 1.6 mm was selected as the raw material. The effect of heat input on the formability, microstructure, and properties of the WAAM alloy was investigated, and the forming model was established. The WAAM alloys were characterized by electronic universal testing, scanning electron microscopy, energy spectrum analysis, and metallographic microscopy. The results show that Al–7Si–0.6Mg alloy has a large processing window under the cold metal transfer (CMT) process, and it can be well formed with a large range of heat input. The secondary dendrite arm spacing and Fe-phase in the as-deposited alloy gradually increase with an increase in heat input, and slight overburning occurs in the heat affected zone at higher heat inputs. After solid solution and aging treatment (T6 heat treatment), the size of α-Al grain and eutectic silicon grain increases with the increase of heat input. Little anisotropy in the mechanical properties is observed except at higher heat inputs. The tensile strength is 354.5 MPa ± 7.5 MPa, yield strength is 310 MPa ± 5.5 MPa, and elongation is 6.3 ± 0.7%.

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“…Lowering heat input and cleaning oxide-film are effective ways to minimize the formation of pores in the weld metal of Al-Li alloys [10,11]. Direct current (DC) CMT welding of aluminum alloys has therefore been used [12,13]. Reduction of heat input and generation of metal compounds in welding process can reduce cracking of weld [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Pulse Frequency on Microstructure and Mechanical Properties of 2198 Al-Li Alloy Joints Obtained by Ultrahigh-Frequency Pulse AC CMT Welding

Wang

Suo

et al. 2018

Materials

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In this study, 2198 Al-Li alloy, a low density and high-performance material for aerospace equipment, was welded using ultrahigh-frequency pulse alternating current with cold metal transfer (UHF-ACCMT). Influence of different ultrahigh-frequency on the formation, porosity, microstructure, microhardness and tensile strength of the welded joints were investigated. The results showed that the coupled ultrahigh-frequency current generated electromagnetic force to stir the liquid metal of molten pool. The weld formation became much better with metallic luster and uniform ripples at frequency of 60 kHz and 70 kHz. The porosity was the minimum at frequency of 60 kHz. Furthermore, the molten pool was scoured and stirred by the electromagnetic force which provided the thermal and dynamic conditions for nucleation and grain refinement, the width of fine equiaxed grain zone became larger, and the number of equiaxed non-dendrite grains increased. With the grain refining and crystallize transition, the average microhardness and tensile strength of the joints at frequency of 60 kHz reached up the highest value, 116 HV0.1 and 338 MPa, respectively. The fracture of the welded joints presented the characteristics of quasi-cleavage fracture.

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Response of CMT Welded Aluminum AA5086-H111 to AA6061-T6 Plate with AA4043 Filler for Ballistic

Cited by 9 publications

References 14 publications

Control of humping phenomenon and analyzing mechanical properties of Al–Si wire-arc additive manufacturing fabricated samples using cold metal transfer process

Control of humping phenomenon and analyzing mechanical properties of Al–Si wire-arc additive manufacturing fabricated samples using cold metal transfer process

Effect of Heat Input on Formability, Microstructure, and Properties of Al–7Si–0.6Mg Alloys Deposited by CMT-WAAM Process

Effect of Pulse Frequency on Microstructure and Mechanical Properties of 2198 Al-Li Alloy Joints Obtained by Ultrahigh-Frequency Pulse AC CMT Welding

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