A review and a statistical analysis of porosity in metals additively manufactured by laser powder bed fusion

Wang，Dawei1,5; Han，Huili2; Sa，Bo1; Li，Kelin1; Yan，Jujie1; Zhang，Jiazhen3; Liu，Jianguang3; He，Zhengdi4; Wang，Ning4; Yan，Ming1,5

2022

10.29026/oea.2022.210058

Opto-Electronic Advances   Impact Factor & Quartile

2096-4579

Additive manufacturing (AM), or 3D printing, is an emerging technology that “adds” materials up and constructs products through a layer-by-layer procedure. Laser powder bed fusion (LPBF) is a powder-bed-based AM technology that can fabricate a large variety of metallic materials with excellent quality and accuracy. However, various defects such as porosity, cracks, and incursions can be generated during the printing process. As the most universal and a near-inevitable defect, porosity plays a substantial role in determining the mechanical performance of as-printed products. This work presents a comprehensive review of literatures that focused on the porosity in LPBF printed metals. The formation mechanisms, evaluation methods, effects on mechanical performance with corresponding models, and controlling methods of porosity have been illustrated and discussed in-depth. Achievements in four representative metals, namely Ti−6Al−4V, 316L, Inconel 718, and AlSi10Mg, have been critically reviewed with a statistical analysis on the correlation between porosity fraction and tensile properties. Ductility has been determined as the most sensitive property to porosity among several key tensile properties. This review also provides potential directions and opportunities to address the current porosity-related challenges.

additive manufacturing defects laser powder bed fusion mechanical performance metallic materials perspectives porosity selective laser melting

SCI

English

First ; Corresponding

Natural Science Foundation of Guangdong Province[2020A1515011373];National Natural Science Foundation of China[51971108];

Optics

Optics

WOS:000887930600004

CAS, INST OPTICS & ELECTRONICS, ED OFF OPTO-ELECTRONIC JOURNALS

2-s2.0-85140031009

Scopus

1.Department of Materials Science and Engineering,Shenzhen Key Laboratory for Additive Manufacturing of High Performance Materials,Southern University of Science and Technology,Shenzhen,518055,China
2.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.COMAC Beijing Aircraft Technology Research Institute,Beijing,102211,China
4.Shenzhen Technology University,Shenzhen,518118,China
5.Jiaxing Research Institute,Southern University of Science and Technology,Jiaxing,314031,China

Wang，Dawei,Han，Huili,Sa，Bo,et al. A review and a statistical analysis of porosity in metals additively manufactured by laser powder bed fusion[J]. Opto-Electronic Advances,2022,5(10).

Wang，Dawei.,Han，Huili.,Sa，Bo.,Li，Kelin.,Yan，Jujie.,...&Yan，Ming.(2022).A review and a statistical analysis of porosity in metals additively manufactured by laser powder bed fusion.Opto-Electronic Advances,5(10).

Wang，Dawei,et al."A review and a statistical analysis of porosity in metals additively manufactured by laser powder bed fusion".Opto-Electronic Advances 5.10(2022).