Preprint Brief Report Version 1 Preserved in Portico This version is not peer-reviewed

Surface and Bulk Quality of Metal Additive AlSi7Mg0.6 With Contour Scan Variation

Version 1 : Received: 23 February 2023 / Approved: 27 February 2023 / Online: 27 February 2023 (04:47:27 CET)

A peer-reviewed article of this Preprint also exists.

Buchenau, T.; Amkreutz, M.; Bruening, H.; Mayer, B. Influence of Contour Scan Variation on Surface, Bulk and Mechanical Properties of LPBF-Processed AlSi7Mg0.6. Materials 2023, 16, 3169. Buchenau, T.; Amkreutz, M.; Bruening, H.; Mayer, B. Influence of Contour Scan Variation on Surface, Bulk and Mechanical Properties of LPBF-Processed AlSi7Mg0.6. Materials 2023, 16, 3169.

Abstract

Metal additive manufacturing technologies have large potential for future use in load bearing aerospace applications, requiring a deeper understanding of mechanical performance and influencing factors. The objective of this study is to manufacture fatigue specimens by laser powder bed fusion with comparable bulk and different as-built surface quality (without post-processing). This goal was pursued by using identical bulk/hatch scan parameters while varying contour scan parameters. The bulk quality was evaluated by density measurements according to Archimedes’ principle and tensile testing. The surfaces were investigated using the optical fringe projection method and surface quality was assessed by the areal surface texture parameters Sa (arithmetic mean height) and Sk (core height, derived from material ratio curve). The resulting mean values of max (ultimate tensile strength) were between 375 and 405 MPa, which is a variation of roughly 8%, for seven different surface conditions. It could be confirmed that the influence of contour scan variation on bulk quality is insignificant for the assessed samples.

Keywords

Additive Manufacturing; Laser Powder Bed Fusion; Mechanical Testing; Tensile Strength; AlSi7Mg0.6; Surface Quality; Bulk Quality; Areal Surface Texture Parameters

Subject

Engineering, Industrial and Manufacturing Engineering

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