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Enhancing the properties of friction stir welded joints of L-PBF printed AlSi10Mg alloy via multi-variable optimization

Minhas Navdeep, Sharma Varun, Bhadauria Shailendra Singh

Archives of Civil and Mechanical Engineering

2023

Vol. 23, no. 1

art. no. e60, 2023

The feasibility study to join the laser powder bed fused AlSi10Mg alloy sheets using different friction stir welding parameters was investigated in the present work. Fifteen butt-welded joints using varied parametric combinations were developed based on the design of the experiment's approach. An empirical model between the process parameters and tensile strength was developed and used to understand the mechanical behavior of the welded joints w.r.t. the FSW parameters, followed by the attainment of optimized welding conditions using response surface methodology. The results inferred that the weldability was most significantly influenced by the tool rotational speed, followed by the tool tilt angle and tool traverse speed. The microstructure and mechanical properties of the optimized welded joint were compared with the as-built alloy and the welded joint yielding minimum tensile strength. The electron back scattered diffraction analysis revealed the reduction of average grain size of the stir zone of the joints by 21% for the optimized weld, as compared to the as-built alloy. The welded zones of the joints showed a reduction in hardness by 40-50% and formed the stir zone as the weakest link. The parametric combinations of the optimized weld improved the joint efficiency by ≈ 20% compared to the other weld, followed by an improvement in ductility, which was further characterized using scanning electron microscopy.

Powstawanie zadziorów przy frezowaniu współbieżnym i przeciwbieżnym stopu AlSi10Mg

Falkowicz K., Kuczmaszewski J.

Przegląd Mechaniczny

2012

nr 9

23-27

Operacje usuwania zadziorów są dość kosztowne, dlatego też znajomość tworzenia się zadziorów pozwala na uwypuklenie istotności tego zagadnienia w świetle ogólnie rozumianej obróbki skrawaniem. W artykule przedstawiony został? mechanizm formowania si´ zadziorów w procesie frezowania czołowego stopu AlSi10Mg. Zbadano również wpływ poszczególnych parametrów obróbki na wielkość powstających zadziorów.

Since deburring is a costly and non-value-adding operation, the understanding and control of burr formation is a research topic with high relevance to industrial applications. The purpose of this paper was to study the burr formation mechanisms in face milling process of aluminum alloy AlSi10Mg, and to investigate the influence of machining parameters on burr formation in face milling.