A high-performance WAAM process for Al-Mg-Mn using controlled short-circuiting metal transfer at increased wire feed rate and increased travel speed

Published: 08-06-2020| Version 2 | DOI: 10.17632/pjjypp5jdd.2
Contributor:
Dmitry Kurushkin

Description

The provided data shows remarkable tensile test results and remarkable macro- and microstructure images, which werw used to evaluate porosity and grain size.

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Walls were produced on a 5056 aluminium alloy substrate with a size of 350*350*40 mm. ESAB OK Autrod 18.22 was used as an Al-Mg-Mn alloy wire with a diameter of 1.2 mm. The WAAM system was composed of a Yaskawa Motoman MH24 robot and a EWM Alpha Q 552 welding power source. A developed high-performance controlled short-circuiting metal transfer process at a wire feed rate of 12 m/min for WAAM with an Al-Mg-Mn alloying system was used to print walls. Argon of 99.99% purity was used as a shielding gas. Tensile tests were carried out on a Tinius Olsen H25KT machine, tensile samples were cut from walls in OX and OZ directions and from bricks – in OX, OY, and OZ directions. The preparation of cylindrical samples with a diameter of 3 mm and a length of 15 mm was carried out in accordance with GOST 6996-66. Longitudinal (ZOX) and transverse (ZOY) sections of walls were prepared using the Buehler grinding system. Macro- and microstructure images were obtained using a Leica DMI 5000M metallographic microscope.