Rapid Prototyping Journal: Volume 23 Issue 2

Microstructure and mechanical property of selective laser melted Ti6Al4V dependence on laser energy density

Jie Han, Jingjing Yang, Hanchen Yu, Jie Yin, Ming Gao, Zemin Wang, Xiaoyan Zeng

This paper aims to investigate the influence of laser energy density on microstructure and mechanical properties of the selective laser melted (SLMed) Ti6Al4V to complement the…

3D printed bio-models for medical applications

Yee Ling Yap, Yong Sheng Edgar Tan, Heang Kuan Joel Tan, Zhen Kai Peh, Xue Yi Low, Wai Yee Yeong, Colin Siang Hui Tan, Augustinus Laude

The design process of a bio-model involves multiple factors including data acquisition technique, material requirement, resolution of the printing technique, cost-effectiveness of…

A novel projection based electro-stereolithography (PES) process for production of 3D polymer-particle composite objects

Yayue Pan, Abhishek Patil, Ping Guo, Chi Zhou

Polymer-particle composites, which have demonstrated wide applications ranging from energy harvesting and storage, biomedical applications, electronics and environmental sensing…

Process control testing for fused filament fabrication

Stephen Oluwashola Akande, Kenny Dalgarno, Javier Munguia

The purpose of this research is to determine what tests can be most useful in quality assurance and control when using fused filament fabrication (FFF) 3D printing machines. The…

Modeling porous structures with fractal rough topography based on triply periodic minimal surface for additive manufacturing

Zhijia Xu, Qinghui Wang, Jingrong Li

The purpose of this paper is to develop a general mathematic approach to model the microstructures of porous structures produced by additive manufacturing (AM), which will result…

Transformation of 3D object into flat ribbon for RPS additive manufacturing technology

Vyacheslav Shulunov

This study aims to give a description of conformal transformation Cartesian coordinates into spiral coordinates using the example of roll powder sintering (RPS) additive…

Mechanical properties and microstructural characterization of selective laser melted 17-4 PH stainless steel

Mohamad Mahmoudi, Alaa Elwany, Aref Yadollahi, Scott M. Thompson, Linkan Bian, Nima Shamsaei

The purpose of this paper is to understand the effect of four different factors: building orientation, heat treatment (solution annealing and aging), thermal history and process…

On the role of different annealing heat treatments on mechanical properties and microstructure of selective laser melted and conventional wrought Ti-6Al-4V

AmirMahyar Khorasani, Ian Gibson, Moshe Goldberg, Guy Littlefair

The purpose of this study was to conduct various heat treatments (HT) such as stress relief annealing, mill annealing, recrystallization (α + β) annealing and β annealing followed…

An improved lattice structure design optimization framework considering additive manufacturing constraints

Recep M. Gorguluarslan, Umesh N. Gandhi, Yuyang Song, Seung-Kyum Choi

Methods to optimize lattice structure design, such as ground structure optimization, have been shown to be useful when generating efficient design concepts with complex truss-like…

Effect of build orientation on the mechanical reliability of 3D printed ABS

Özgür Keleş, Caleb Wayne Blevins, Keith J. Bowman

Increasing use of 3D printing techniques to manufacture consumer products and open-source designs raises the question of “What is the mechanical reliability of 3D printed parts?”…

Towards direct metal laser fabrication of Cu-based shape memory alloys

Gonzalo Reyes Donoso, Magdalena Walczak, Esteban Ramos Moore, Jorge Andres Ramos-Grez

The purpose of this paper is to explore the possibility of producing Cu-based shape memory alloys (SMA) by means of direct metal laser fabrication (DMLF).

Direct-print photopolymerization for 3D printing

Morteza Vatani, Jae-Won Choi

This work aims to present a guideline for ink development used in extrusion-based direct-write (DW) (also referred to as direct-print [DP]) technique and combine the extrusion…

Comparative study of rapid and conventional tooling for plastics injection molding

Gabriel Antonio Mendible, Jack A. Rulander, Stephen P. Johnston

This study aims to evaluate the performance of injection molding inserts produced via rapid and conventional manufacturing techniques considering the mechanical and thermal…

Study of separation force in constrained surface projection stereolithography

Yayue Pan, Haiyang He, Jie Xu, Alan Feinerman

Recently, the constrained surface projection stereolithography (SL) technology is gaining wider attention and has been widely used in the 3D printing industry. In constrained…

Approaches to minimize overhang angles of SLM parts

Michael Cloots, Livia Zumofen, Adriaan Bernardus Spierings, Andreas Kirchheim, Konrad Wegener

For geometries exhibiting overhanging surfaces, support structures are needed to dissipate process heat and to minimize geometrical distortions attributed to internal stresses…

Characteristic length of the solidified melt pool in selective laser melting process

Il Hyuk Ahn, Seung Ki Moon, Jihong Hwang, Guijun Bi

This paper aims to propose methods to evaluate the characteristic length of the melt pool for accurate fabrication and to identify the optimal process parameters in the selective…

Geometric model reconstruction through a surface extension algorithm for remanufacturing of twist blades

Jian Gao, Hao Wen, Zhiyuan Lin, Haidong Wu, Si Li, Xin Chen, Yun Chen, Yunbo He

Remanufacturing of worn blades with various defects normally requires processes such as scanning, regenerating a geometrical reference model, additive manufacturing (AM) through…

A dynamic model for nozzle clog monitoring in fused deposition modelling

Yedige Tlegenov, Yoke San Wong, Geok Soon Hong

Fused deposition modelling (FDM) is one of the most popular additive manufacturing processes, and is widely used for prototyping and fabricating low-cost customized parts. Current…

Plate auto-level system for fused deposition modelling (FDM) 3D printers

Enrique Soriano Heras, Fernando Blaya Haro, José María de Agustín del Burgo, Manuel Enrique Islán Marcos

The purpose of this paper is to present a solution for the levelling plate of fused deposition modelling (FDM) additive manufacturing (AM) systems. This automatic levelling system…

Bond and part strength in fused deposition modeling

Timothy J. Coogan, David Owen Kazmer

The purpose of this paper is to investigate the factors governing bond strength in fused deposition modeling (FDM) compared to strength in the fiber direction.

Robocasting of carbon-alumina core-shell composites using co-extrusion

Zongwen Fu, Matthias Freihart, Tobias Schlordt, Tobias Fey, Torsten Kraft, Peter Greil, Nahum Travitzky

This study aims to achieve the fabrication of three-dimensional core-shell filament-based lattice structures by means of robocasting combined with co-extrusion. For core and shell…

Selection of additive manufacturing processes

Yuanbin Wang, Robert Blache, Xun Xu

This study aims to review the existing methods for additive manufacturing (AM) process selection and evaluate their suitability for design for additive manufacturing (DfAM). AM…

Numerical simulation and experimental calibration of additive manufacturing by blown powder technology. Part I: thermal analysis

Michele Chiumenti, Xin Lin, Miguel Cervera, Wei Lei, Yuxiang Zheng, Weidong Huang

This paper aims to address the numerical simulation of additive manufacturing (AM) processes. The numerical results are compared with the experimental campaign carried out at…