On the role of melt flow into the surface structure and porosity development during selective laser melting
Chunlei Qiu,Chinnapat Panwisawas,Mark Ward,Hector Basoalto,Jeffery Brooks,Moataz M. Attallah +5 more
TLDR
In this paper, the development of surface structure and porosity of Ti-6Al-4V samples fabricated by selective laser melting under different laser scanning speeds and powder layer thicknesses has been studied and correlated with the melt flow behavior through both experimental and modelling approaches.About:
This article is published in Acta Materialia.The article was published on 2015-09-01 and is currently open access. It has received 689 citations till now. The article focuses on the topics: Selective laser melting & Porosity.read more
Citations
More filters
Journal ArticleDOI
Additive manufacturing of metallic components – Process, structure and properties
Tarasankar Debroy,Huiliang Wei,J.S. Zuback,T. Mukherjee,John W. Elmer,John O. Milewski,Allison M. Beese,Alexander E. Wilson-Heid,Amitava De,Wei Zhang +9 more
TL;DR: A review of the emerging research on additive manufacturing of metallic materials is provided in this article, which provides a comprehensive overview of the physical processes and the underlying science of metallurgical structure and properties of the deposited parts.
Journal ArticleDOI
Laser powder-bed fusion additive manufacturing: Physics of complex melt flow and formation mechanisms of pores, spatter, and denudation zones
TL;DR: In this paper, the effect of the recoil pressure and Marangoni convection in laser powder bed fusion (L-PBF) of 316L stainless steel was demonstrated. And the results were validated against the experiments and the sensitivity to laser absorptivity was discussed.
Journal ArticleDOI
In situ X-ray imaging of defect and molten pool dynamics in laser additive manufacturing
Chu Lun Alex Leung,Sebastian Marussi,Robert Atwood,Michael Towrie,Philip J. Withers,Peter D. Lee +5 more
TL;DR: A mechanism map for predicting the evolution of melt features, changes in melt track morphology from a continuous hemi-cylindrical track to disconnected beads with decreasing linear energy density and improved molten pool wetting with increasing laser power is developed.
Journal ArticleDOI
Microstructure, defects and mechanical behavior of beta-type titanium porous structures manufactured by electron beam melting and selective laser melting
Yujing Liu,Yujing Liu,Shujun Li,Hailong Wang,W. T. Hou,Yang Hao,Ren-Fu Yang,Timothy B. Sercombe,Lai-Chang Zhang +8 more
TL;DR: In this article, the differences in the microstructure, defects and mechanical behavior of porous structures from a β-type Ti 24Nb 4Zr 8Sn manufactured by electron beam melting (EBM) and selective laser melting (SLM) were investigated and correlated to the compressive mechanical and fatigue properties.
Journal ArticleDOI
Material-structure-performance integrated laser-metal additive manufacturing.
TL;DR: In this article, a holistic concept of material-structure-performance integrated additive manufacturing (MSPI-AM) is proposed to cope with the extensive challenges of laser-based additive manufacturing.
References
More filters
Journal ArticleDOI
A continuum method for modeling surface tension
TL;DR: In this paper, a force density proportional to the surface curvature of constant color is defined at each point in the transition region; this force-density is normalized in such a way that the conventional description of surface tension on an interface is recovered when the ratio of local transition-reion thickness to local curvature radius approaches zero.
Journal ArticleDOI
A study of the microstructural evolution during selective laser melting of Ti–6Al–4V
TL;DR: In this article, the development of the microstructure of the Ti-6Al-4V alloy processed by selective laser melting (SLM) was studied by light optical microscopy.
Journal ArticleDOI
Fine-structured aluminium products with controllable texture by selective laser melting of pre-alloyed AlSi10Mg powder
TL;DR: In this paper, the high thermal gradients occurring during SLM lead to a very fine microstructure with submicron-sized cells, which can be modified to a weak cube texture along the building and scanning directions when a rotation of 90° of the scanning vectors within or between the layers is applied.
Journal ArticleDOI
As-Fabricated and Heat-Treated Microstructures of the Ti-6Al-4V Alloy Processed by Selective Laser Melting
TL;DR: In this paper, the authors presented the various types of microstructure of the Ti-6Al-4V alloy after post-fabrication heat treatments below or above the β transus.