A comparative study of mechanical properties of metal inert gas (MIG)-cold metal transfer (CMT) and fiber laser-MIG hybrid welds for 6005A T6 extruded sheet

Cornacchia, Giovanna; Cecchel, Silvia; Panvini, Andrea

doi:10.1007/s00170-017-0914-9

Cited by 37 publications

(15 citation statements)

References 29 publications

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“…This critical procedure can be solved by using the twin spot laser technique with filler wire or hybrid arc-laser welding, but will decrease the welding speed. One of the ways to solve this problem is the use of laser beam wobbling mode [11,12,[44][45][46][47][48][49][50].…”

Section: Welding Techniques Examinedmentioning

confidence: 99%

“…These defects determine reduced strength and corrosion in the fusion zone (FZ) and HAZ, with a general decrease in mechanical properties. These defects are generally reduced, providing efficient protection from the contamination of atmospheric gases to the weld pool or/and decreasing the influence of the weld thermal load by using welding processes with higher energy density [11,12].These problems have to be faced, mainly due to the increasing employment of Al in complex vehicle parts, which implies a higher number of potential applications of Al hybrid structures. For example, during the last few years, both cast and wrought Al parts have been introduced in automotive complex shapes, which entails the need to join them into the final structure.…”

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confidence: 99%

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confidence: 99%

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Study and Characterization of EN AW 6181/6082-T6 and EN AC 42100-T6 Aluminum Alloy Welding of Structural Applications: Metal Inert Gas (MIG), Cold Metal Transfer (CMT), and Fiber Laser-MIG Hybrid Comparison

Cornacchia

Cecchel

2020

Metals

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The present research investigates the effects of different welding techniques, namely traditional metal inert gas (MIG), cold metal transfer (CMT), and fiber laser-MIG hybrid, on the microstructural and mechanical properties of joints between extruded EN AW 6181/6082-T6 and cast EN AC 42100-T6 aluminum alloys. These types of weld are very interesting for junctions of Al-alloys parts in the transportation field to promote the lightweight of a large scale chassis. The weld joints were characterized through various metallurgical methods including optical microscopy and hardness measurements to assess their microstructure and to individuate the nature of the intermetallics, their morphology, and distribution. The results allowed for the evaluation of the discrepancies between the welding technologies (MIG, CMT, fiber laser) on different aluminum alloys that represent an exhaustive range of possible joints of a frame. For this reason, both simple bar samples and real junctions of a prototype frame of a sports car were studied and, compared where possible. The study demonstrated the higher quality of innovative CMT and fiber laser-MIG hybrid welding than traditional MIG and the comparison between casting and extrusion techniques provide some inputs for future developments in the automotive field.

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Section: Welding Techniques Examinedmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Study and Characterization of EN AW 6181/6082-T6 and EN AC 42100-T6 Aluminum Alloy Welding of Structural Applications: Metal Inert Gas (MIG), Cold Metal Transfer (CMT), and Fiber Laser-MIG Hybrid Comparison

Cornacchia

Cecchel

2020

Metals

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“…An ITALPRESSE TF cold chamber machine (ITALPRESSE, Brescia, Italy) with a maximum locking force of 3000 t equipped with Fondarex vacuum was used to produce the suspension cross beam prototypes. More details about the component properties can be found in the previous works of the authors [17][18][19][20][21][22][23][24]. The aluminium alloy used for the production of the cross beam prototypes is EN AC-43500 alloy, the chemical composition of which is reported in Table 1.…”

Section: Geometry Materials and Process Descriptionmentioning

confidence: 99%

“…For the sake of clarity, the subject of this article belongs to the wider research on the reduction of the weight of safety-relevant structures in the Commercial Vehicle (CV) field [17][18][19][20][21][22][23][24]. This project developed a new concept for aluminium cross beam suspensions in CV as a replacement for the currently used steel components.…”

Section: Introductionmentioning

confidence: 99%

Correlation between Numerical and Experimental Structural Resistance of a Safety Relevant Aluminum Automotive Component

Cecchel

Ferrario²,

Mega³

et al. 2019

Metals

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Accurate implementation of weight reduction for the development of innovative safety-relevant components, such as suspension assemblies, requires a careful evaluation of the structural resistance. The validation of these critical parts usually employs Finite Element Analysis (FEA) during the design phase and laboratory tests on prototypes during later stages. However, the results of these established methods have rarely been numerically compared. The present paper introduces a method for comparing FEA and testing, based on the elaboration of micro-strains acquired with strain gauges positioned in specific regions. The model was applied to the real case study of an innovative lightweight cross beam. FEA simulations and bench tests under different conditions that were representative of the operating environments were carried out. Two different relevant configurations of fatigue bench tests were considered. Then, the data obtained from testing were numerically elaborated in order to compare them with the analytical results. Real data from in-field measurements were used. The cross beam endured at the elevate mission loads reproduced at the bench test. The FEA and testing results were aligned. The correlation method was proven to be reliable, since it made it possible not only to numerically evaluate the testing output, but also to validate the calculation tools, and it could be extended to similar applications in future.

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Development of Heat Treatments for Selective Laser Melting Ti6Al4V Alloy: Effect on Microstructure, Mechanical Properties, and Corrosion Resistance

Cecchel¹,

Ferrario²,

Cornacchia

et al. 2020

Adv Eng Mater

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To evaluate the introduction of selective laser melting (SLM) for serial application, some features directly related to the components safety and performances are to be deeply analyzed. To this purpose, the present article applies three different types of heat treatment on Ti6Al4V as‐received samples produced by SLM: 1) annealing stress relieving, 2) solubilization super‐β transus, and 3) sub‐β transus followed by a tempering. Then, the related microstructures, mechanical resistance, residual stresses, and corrosion resistance are studied. The results identify a set of heat treatment parameters (super‐β transus followed by tempering), which guarantee the required properties. These samples show equiaxial grains composed of α + β phase, good mechanical properties, a high resistance to corrosion, and residual stresses almost null. Finally, this study confirms that Ti6Al4V made by SLM is applied in the transport field.

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A comparative study of mechanical properties of metal inert gas (MIG)-cold metal transfer (CMT) and fiber laser-MIG hybrid welds for 6005A T6 extruded sheet

Cited by 37 publications

References 29 publications

Study and Characterization of EN AW 6181/6082-T6 and EN AC 42100-T6 Aluminum Alloy Welding of Structural Applications: Metal Inert Gas (MIG), Cold Metal Transfer (CMT), and Fiber Laser-MIG Hybrid Comparison

Study and Characterization of EN AW 6181/6082-T6 and EN AC 42100-T6 Aluminum Alloy Welding of Structural Applications: Metal Inert Gas (MIG), Cold Metal Transfer (CMT), and Fiber Laser-MIG Hybrid Comparison

Correlation between Numerical and Experimental Structural Resistance of a Safety Relevant Aluminum Automotive Component

Development of Heat Treatments for Selective Laser Melting Ti6Al4V Alloy: Effect on Microstructure, Mechanical Properties, and Corrosion Resistance

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