The microstructure and mechanical strength of Al-6061-T6 GMA welds obtained with the modified indirect electric arc joint

Ambriz, R.R.; Barrera, G.; Garcı́a, R.; López, V. H.

doi:10.1016/j.matdes.2009.12.017

Cited by 50 publications

(13 citation statements)

References 11 publications

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“…This mechanism is mainly responsible for decline in hardening and the formation of βnormal′ after welding, resulting in decrease of tensile strength. 28,29 The WoR samples failed in the weld zone. This is attributed that welding process initiated a microstructural transformation from βnormal″to βnormal′ precipitates causing a soft zone in weld metal region.…”

Section: Resultsmentioning

confidence: 96%

Studies on cold metal transfer welding of aluminium alloy 6061-T6 using ER 4043

Pramod

Shanmugam

Krishnadasan

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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Aluminium alloy 6061-T6 is utilized in aerospace industry for developing pressure vessel liner. Cold metal transfer is a promising welding process used in fabricating aluminium structures. The present work is focussed to achieve an optimum welding parameter for joining a 3.5-mm thick pressure vessel and to examine the mechanical properties and metallurgical nature of the weldment. The welded joint was evaluated as defect free using radiography test. The joint efficiency (66.61%) and measured microhardness of weldment (59.78 HV) exhibited promising results. The effect of grain coarsening in the heat affected zone (HAZ) and weld zone is attributed to the thermal gradients during welding. Dissipation of small amounts of strengthening elements Si and Mg during welding leads to reduction in mechanical properties. X-ray diffraction peaks revealed the presence of intermetallic Al–Si and Fe–Si in the weld zone. Fractography examination confirms the ductile type of failure in the fractured surface of the tensile samples.

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Section: Resultsmentioning

confidence: 96%

Studies on cold metal transfer welding of aluminium alloy 6061-T6 using ER 4043

Pramod

Shanmugam

Krishnadasan

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…It is proposed that the high ductility of A6061 weld using ER4043 shows finer distribution of crystal grain structure and the proportion of an even grain size compared to narrow and non equiaxed grain particles in A6061 weld using ER5356. It is believed that this could happen when it is directly related with thesolidification rate and leads to a significant increase in crystalline growth [1]. Considering the high hardness value of A6061 welds using ER5356, it is an indication that the joint performed low ductility value as being performed in previous tensile test.…”

Section: Micro Hardness Testmentioning

confidence: 99%

Influence of Alloying Element in Filler Metal on Mechanical Properties of A6061 Al Alloy Welded Joints

Che Lah,

Hussin

2020

IJEAT

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 Abstract: The current work is intended to study the influence of using ER4043 and ER5356 filler metals on mechanical properties of A6061 Al alloy welded joint made by gas metal arc welding process (GMAW). For this study, 12mm plates of these materials were joint using a type single V groove butt joints with four layers and five passes configurationof welded joints. The soundness of the quality of the weld joint was investigated by X-ray Ct-Scan technique. The joint made with the ER4043 presented an enhancement of mechanical properties. In comparisonwith the joint made with ER5356, Al A6061 with ER4043 welded joint shows to have an advantage due to the formation of very fine grain and have uniformly distributed porosity in the weld region area.Index Terms: A6061 Al alloy, welded joint, filler metal, mechanical properties, porosity.

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“…The 7075‐T651 material provides a yield and ultimate tensile strength of approximately 460 and 540 MPa, respectively, whereas the 6061‐T6 alloy has values between 240 and 290 MPa 2 . The use of arc welding processes tends to decrease the strength of the welded joints 3–6 . That reduction is produced by the thermodynamic instability of the coherent η ´ (7075 alloy) and β ´´ (6061 alloy) phases, which produces a soft zone formation (over‐aging effect) in the heat‐affected zone (HAZ) 7,8 .…”

Section: Introductionmentioning

confidence: 99%

Impact test behavior of aluminum alloys welded joints: Experimental and numerical analysis

Martínez

Ambriz

Naït-Abdelaziz

et al. 2021

Fatigue Fract Eng Mat Struct

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The Charpy impact test behavior of base metal, weld metal, and heat‐affected zone for 6061‐T6 and 7075‐T651 aluminum alloy welds was analyzed. Force versus time curves of welded joints were obtained by means of an instrumented Charpy pendulum. An explicit finite element model was implemented to evaluate the performance of the Cowper–Symonds constitutive model. Parameters were obtained through a strain‐rate‐sensitivity analysis of base metals at high strain rates. Experimental results were compared with those computed by finite element method (FEM) by assuming the same physical and geometrical conditions of the dynamic‐experimental tests. ANSYS‐LS DYNA was used to achieve the FEM simulations. The comparison between experimental and FEM results in terms of force versus time data was evaluated. Higher accuracies were observed in Al 7075‐T651 alloy (roughly 98%). The 6061‐T6 alloy has shown an approximation of about 90%. Discrepancies are explained in terms of the effective plastic strain at fracture.

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The microstructure and mechanical strength of Al-6061-T6 GMA welds obtained with the modified indirect electric arc joint

Cited by 50 publications

References 11 publications

Studies on cold metal transfer welding of aluminium alloy 6061-T6 using ER 4043

Studies on cold metal transfer welding of aluminium alloy 6061-T6 using ER 4043

Influence of Alloying Element in Filler Metal on Mechanical Properties of A6061 Al Alloy Welded Joints

Impact test behavior of aluminum alloys welded joints: Experimental and numerical analysis

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