Effect of laser power on microstructure and mechanical properties of oscillating laser-arc hybrid additive manufactured high-strength aluminum alloy

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-03-14 DOI:10.1016/j.optlastec.2025.112800

Xiaohan Guo, Yunfei Meng, Qianxi Yu, Jianeng Xu, Xu Wu, Hui Chen

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引用次数: 0

Abstract

Oscillating laser was adopted for wire arc additive manufacturing of high-strength aluminum alloy to solve the problems of low forming accuracy and unsatisfactory performances. The effects of laser power on the forming accuracy, microstructure, and mechanical properties of deposited thin-walls were mainly investigated. The results showed that increasing laser power from 1.5 to 2.5 kW improved the flatness of side-wall, and removed the forming defects such as humps, uneven height and overflow. The porosity was decreased from 2.42 % to 1.79 %, and the forming accuracy was increased by 38 %. Moreover, the average grain size of deposited microstructure was reduced by 14 % from 48.55 to 41.67 μm. Owing to these improvements, both the UTS and elongation of deposited thin-wall were improved by 10.1 % and 20.2 %, respectively. The optimized laser oscillation promoted the fast escape of bubbles in molten pool, and also formed stirring effects to transform columnar grains to refined equiaxed grains, thereby improving the mechanical properties of depositions.

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems