On the Role of Microstructure and Defects in the Room and High-Temperature Tensile Behavior of the PBF-LB A357 (AlSi7Mg) Alloy in As-Built and Peak-Aged Conditions

Tonelli, Lavinia; Liverani, Erica; Egidio, Gianluca Di; Fortunato, Alessandro; Morri, Alessandro; Ceschini, Lorella

doi:10.3390/ma16072721

Cited by 4 publications

(1 citation statement)

References 51 publications

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“…The LPBF parts were produced using a SISMA MYSINT100 system in a cold building platform of 100 mm in diameter. All samples were built in a nitrogen environment with a residual oxygen content < 0.1% using the same laser parameters, optimized in previous studies [21] and summarized in Table 1. After printing, stress relieving heat treatment at 300°C with a holding time of 120 min, followed by slow cooling was performed in according with literature ndings [22].…”

Section: Production and Characterization Of Alsi10mg Partsmentioning

confidence: 99%

The role of filler wire and scanning strategy in laser welding of difficult-to-weld aluminum alloys

Liverani

Ascari²,

Fortunato³

2023

Preprint

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Laser welding of dissimilar aluminum alloys gained an increased interest in the last few years, especially for the production of lightweight components. Pores and crack formation is one of the most critical factors to be taken into consideration in this type of application, in particular when one or more parts are produced by means of die casting or additive manufacturing. Current laser systems offer several methods for defects reduction and process control and optimized process’s strategies must be correlated to key-weld factors. In light of these factors, the current paper discusses the lap-joint welding of AA6082 sheets with AlSi10Mg ones produced additively in a configuration that is typical for the manufacture of battery housing for the e-mobility industry. Both autogenous laser welding and laser welding with filler wire are investigated, along with the potential advantages of using a wobbling scanning strategy, in order to understand the impact of process strategies on weld bead quality. The importance of process parameters is pointed out for any of the aforementioned strategies, with special emphasis on defects, weld bead chemical composition, joint morphology and dilution between involved materials. The findings demonstrated that, by selecting a welding with wire and active wobbling, high-reflection alloys can be welded correctly and with a good tolerance on the process parameters, but autogenous high-productivity welding can also be considered in linear scanning conditions with a specific optimization of the process parameters.

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Section: Production and Characterization Of Alsi10mg Partsmentioning

confidence: 99%

The role of filler wire and scanning strategy in laser welding of difficult-to-weld aluminum alloys

Liverani

Ascari²,

Fortunato³

2023

Preprint

Self Cite

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show abstract

The role of filler wire and scanning strategy in laser welding of difficult-to-weld aluminum alloys

Liverani

Ascari

Fortunato

2023

Int J Adv Manuf Technol

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Laser welding of dissimilar aluminum alloys has gained interest over recent years, especially for the production of lightweight components. Pore and crack formation is one of the most critical factors to be taken into consideration for such applications, in particular when one or more parts are produced by die casting or additive manufacturing (AM). Current laser systems offer several methods for defect reduction and process control, while optimized process strategies must be correlated to key factors influencing welding outcomes. In light of these aspects, the current paper investigates the welding of AA6082 sheets with AlSi10Mg parts produced by AM in a lap-joint configuration typical of battery housings in the e-mobility industry. Both laser welding with and without filler wire are investigated, along with the potential advantages of using a wobbling scanning strategy, in order to understand the impact of process strategies on weld bead quality. The importance of process parameter optimization is highlighted for all of the employed strategies, with special emphasis on defects, weld bead chemical composition, joint morphology, and dilution between the materials involved. The findings demonstrate that by introducing filler wire and employing active wobbling, highly reflective alloys can be welded correctly (porosity below 1%, equivalent ultimate strength up to 204 MPa) with good tolerance to variations in process parameters, while filler wire can be excluded in high-productivity welding where linear scanning is employed and detailed optimization of process parameters is performed (porosity below 2%, equivalent ultimate strength up to 190 MPa).

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Investigation on Mechanical Behavior of LM26 Aluminum Alloy—ZrB2 and Copper-Coated Short Steel Fiber-Reinforced Composites Using Stir Casting Process

Vijayan,

Chelladurai,

Saiyathibrahim

2024

Inter Metalcast

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On the Role of Microstructure and Defects in the Room and High-Temperature Tensile Behavior of the PBF-LB A357 (AlSi7Mg) Alloy in As-Built and Peak-Aged Conditions

Cited by 4 publications

References 51 publications

The role of filler wire and scanning strategy in laser welding of difficult-to-weld aluminum alloys

The role of filler wire and scanning strategy in laser welding of difficult-to-weld aluminum alloys

The role of filler wire and scanning strategy in laser welding of difficult-to-weld aluminum alloys

Investigation on Mechanical Behavior of LM26 Aluminum Alloy—ZrB2 and Copper-Coated Short Steel Fiber-Reinforced Composites Using Stir Casting Process

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