Surface roughness improvement of Ti-6Al-4V alloy overhang structures via process optimization for laser-powder bed fusion

Tian，Yupei1; Ren，Huilin1; He，Jian1; Zha，Xinmeng1; Lin，Kaijie3; Zhou，Mingdong2; Xiong，Yi1

2024-01-31

10.1016/j.jmapro.2024.01.008

Journal of Manufacturing Processes   影响因子和分区

1526-6125

In recent years, additive manufacturing of Ti-6Al-4V alloy components via Laser-Powder Bed Fusion has seen increasing application in the aerospace, military, and medical sectors. However, the high surface roughness of up- and down-skin for overhang structures remains a primary impediment to expanded implementation. This study aims to investigate the effects of the overhang angle and process parameters on the up- and down-skin surface roughness of the overhang structure. In addition, the underlying mechanisms leading to the different roughness of the up- and down-skin of the overhanging structure are comparatively analyzed. Subsequently, a response surface model was generated using the biharmonic spline interpolation (V4) method to optimize the process parameters, aiming to simultaneously improve the roughness of both up- and down-skin. Results demonstrate that the optimized parameters reduced the roughness of up- and down-skin by approximately 50 %.

Laser-powder bed fusion Linear energy density Overhang structure Process optimization Surface roughness

SCI ; EI

英语

第一 ; 通讯

2-s2.0-85182505532

Scopus

1.School of System Design and Intelligent Manufacturing,Southern University of Science and Technology,Shenzhen,518055,China
2.Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures,School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai,200240,China
3.Jiangsu Provincial Engineering Laboratory for Laser Additive Manufacturing of High-Performance Metallic Components,College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,China

Tian，Yupei,Ren，Huilin,He，Jian,et al. Surface roughness improvement of Ti-6Al-4V alloy overhang structures via process optimization for laser-powder bed fusion[J]. Journal of Manufacturing Processes,2024,110:434-446.

Tian，Yupei.,Ren，Huilin.,He，Jian.,Zha，Xinmeng.,Lin，Kaijie.,...&Xiong，Yi.(2024).Surface roughness improvement of Ti-6Al-4V alloy overhang structures via process optimization for laser-powder bed fusion.Journal of Manufacturing Processes,110,434-446.

Tian，Yupei,et al."Surface roughness improvement of Ti-6Al-4V alloy overhang structures via process optimization for laser-powder bed fusion".Journal of Manufacturing Processes 110(2024):434-446.