Method of determination and optimization of the control parameters for an LPCE process

Vijulie, Mihai; Lazăr, Alin; Brad, Sebastian; Balteanu, Ovidiu; Ștefan, Iuliana; Bucur, Ciprian; Moraru, Carmen; Sofilca, Nicolae

doi:10.1016/j.fusengdes.2019.03.025

Cited by 1 publication

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“…Therefore, current study mainly focuses on the adjustment of the above parameters and multiobjective optimization. 8,9 To date, the SLM forming of metal powder such as titanium alloy, nickel alloy, stainless steel alloy, and otherwise has been studied quite extensive and in-depth research. [10][11][12] For aluminum alloys, AlSi10Mg is well studied, however, relatively few studies on Al6061 alloy due to the hot crack problem during SLM process, though it is widely used in aerospace and automotive fields.…”

Section: Introductionmentioning

confidence: 99%

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Effect of laser power on the forming quality of Al6061 alloy manufactured via selective laser melting

Duan

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part E:

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A systematic work was studied to illustrate the influence of laser power on the forming quality of Al6061 alloy by selective laser melting (SLM). The relationship between laser power and molten pool was simulated by finite element analysis (FEA). Phase composition, defects, and microhardness were also measured and analyzed. The results show that, with the increase of laser power, the molten pool gradually changes from rectangular shape to droplet shape. And the cooling rate gradually increases from 3.282 × 104°C/s to 5.189 × 104°C/s. Higher laser power (400 W) is accompanied by higher molten pool maximum temperature (2012.73°C). This may lead to larger temperature gradient inside the sample causing evaporation and spatter of powder. On the contrary, lower laser power leads to unmelt of some powders, which increases the number of pore defects and influences the forming quality of samples. X-ray diffractogram (XRD) displays the Al6061 alloy characterized by the obvious preferred orientation under different laser powers and the grain size increased from 32.57 nm to 35.38 nm. With the increase of laser power, the number of defects, especially holes and microcracks, was first decreased and then increased. However, the microhardness of the sample decreased almost linearly from 98.6 HV0.05 to 88.86 HV0.05. All changes are the result of the comprehensive action of laser power and molten pool state. Besides, the action mechanism of laser power on the forming quality was also clarified in this work.

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Section: Introductionmentioning

confidence: 99%

“…Therefore, current study mainly focuses on the adjustment of the above parameters and multi-objective optimization. 8,9…”

Section: Introductionmentioning

confidence: 99%

Effect of laser power on the forming quality of Al6061 alloy manufactured via selective laser melting

Duan

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part E:

View full text Add to dashboard Cite

show abstract

Method of determination and optimization of the control parameters for an LPCE process

Cited by 1 publication

References 2 publications

Effect of laser power on the forming quality of Al6061 alloy manufactured via selective laser melting

Effect of laser power on the forming quality of Al6061 alloy manufactured via selective laser melting

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