scholarly journals Optimization of the 3D Printing Parameters for Tensile Properties of Specimens Produced by Fused Filament Fabrication of 17-4PH Stainless Steel

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 774 ◽  
Author(s):  
Damir Godec ◽  
Santiago Cano ◽  
Clemens Holzer ◽  
Joamin Gonzalez-Gutierrez
Keyword(s):  
Stainless Steel ◽  
3D Printing ◽  
Tensile Properties ◽  
Layer Thickness ◽  
Flow Rate ◽  
Three Dimensional ◽  
Steel Powder ◽  
Extrusion Temperature ◽  
Fused Filament Fabrication ◽  
Printing Parameters

Fused filament fabrication (FFF) combined with debinding and sintering could be an economical process for three-dimensional (3D) printing of metal parts. In this paper, compounding, filament making, and FFF processing of feedstock material with 55% vol. of 17-4PH stainless steel powder in a multicomponent binder system are presented. The experimental part of the paper encompasses central composite design for optimization of the most significant 3D printing parameters (extrusion temperature, flow rate multiplier, and layer thickness) to obtain maximum tensile strength of the 3D-printed specimens. Here, only green specimens were examined in order to be able to determine the optimal parameters for 3D printing. The results show that the factor with the biggest influence on the tensile properties was flow rate multiplier, followed by the layer thickness and finally the extrusion temperature. Maximizing all three parameters led to the highest tensile properties of the green parts.

Extrusion Temperature and Flow Rate Effects on Tensile Properties of Additively Processed Poly(Ethylene-co-Trimethylene Terephthalate)

2018 ◽  
Vol 382 ◽  
pp. 104-108
Author(s):  
Robert Bail
Keyword(s):  
Tensile Properties ◽  
Flow Rate ◽  
Tensile Modulus ◽  
Volumetric Flow Rate ◽  
Extrusion Temperature ◽  
Fused Filament Fabrication ◽  
Effective Strategies ◽  
Rate Effects ◽  
Trimethylene Terephthalate ◽  
Poly Ethylene

This study investigated the effects of the extrusion temperature and volumetric flow rate settings in a fused filament fabrication (FFF) process on the tensile properties of specimens made of poly(ethylene-co-trimethylene terephthalate). The tensile strength almost doubled from 13.5 MPa at 230°C to 26.7 MPa at 260°C extrusion temperature, while the elongation at break improved to 5.4% and the tensile modulus rose to 641.8 MPa at the highest temperature. Similar observations were made when the extrusion flow rate was augmented to 115% of the initial value, with part strength greatly improving to 795.9 MPa and part elasticity increasing by 22%. These results illustrate two effective strategies to enhance the mechanical properties of components made in an engineering material that is increasingly being utilized in filament-based 3D printing.

scholarly journals Effects of 3D Printing-Line Directions for Stretchable Sensor Performances

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1791
Author(s):  
Chi Cuong Vu ◽  
Thanh Tai Nguyen ◽  
Sangun Kim ◽  
Jooyong Kim
Keyword(s):  
3D Printing ◽  
Thermoplastic Polyurethane ◽  
Three Dimensional ◽  
Optimal Solution ◽  
Human Motion ◽  
Repeated Measurements ◽  
Fused Filament Fabrication ◽  
And Performance ◽  
The Times ◽  
Stretchable Sensors

Health monitoring sensors that are attached to clothing are a new trend of the times, especially stretchable sensors for human motion measurements or biological markers. However, price, durability, and performance always are major problems to be addressed and three-dimensional (3D) printing combined with conductive flexible materials (thermoplastic polyurethane) can be an optimal solution. Herein, we evaluate the effects of 3D printing-line directions (45°, 90°, 180°) on the sensor performances. Using fused filament fabrication (FDM) technology, the sensors are created with different print styles for specific purposes. We also discuss some main issues of the stretch sensors from Carbon Nanotube/Thermoplastic Polyurethane (CNT/TPU) and FDM. Our sensor achieves outstanding stability (10,000 cycles) and reliability, which are verified through repeated measurements. Its capability is demonstrated in a real application when detecting finger motion by a sensor-integrated into gloves. This paper is expected to bring contribution to the development of flexible conductive materials—based on 3D printing.

scholarly journals Porous PLAs with Controllable Density by FDM 3D Printing and Chemical Foaming Agent

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 866
Author(s):  
A. R. Damanpack ◽  
André Sousa ◽  
M. Bodaghi
Keyword(s):  
3D Printing ◽  
Flow Rate ◽  
Three Dimensional ◽  
Poly Lactic Acid ◽  
Layer By Layer ◽  
Printing Technology ◽  
Material Density ◽  
Foaming Agent ◽  
3D Printing Technology ◽  
Fabrication Parameters

This paper shows how fused decomposition modeling (FDM), as a three-dimensional (3D) printing technology, can engineer lightweight porous foams with controllable density. The tactic is based on the 3D printing of Poly Lactic Acid filaments with a chemical blowing agent, as well as experiments to explore how FDM parameters can control material density. Foam porosity is investigated in terms of fabrication parameters such as printing temperature and flow rate, which affect the size of bubbles produced during the layer-by-layer fabrication process. It is experimentally shown that printing temperature and flow rate have significant effects on the bubbles’ size, micro-scale material connections, stiffness and strength. An analytical equation is introduced to accurately simulate the experimental results on flow rate, density, and mechanical properties in terms of printing temperature. Due to the absence of a similar concept, mathematical model and results in the specialized literature, this paper is likely to advance the state-of-the-art lightweight foams with controllable porosity and density fabricated by FDM 3D printing technology.

3 D printing technology and experimental study of chitosan gel using atomized solidification liquid-assisted extrusion molding

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yangwei Wang ◽  
Peilun Lv ◽  
Jian Li ◽  
Liying Yu ◽  
Guodong Yuan ◽  
...  
Keyword(s):  
3D Printing ◽  
Three Dimensional ◽  
Theoretical Research ◽  
Error Sources ◽  
Printing Technology ◽  
Content Type ◽  
Printing Ink ◽  
Printing Parameters ◽  
Chitosan Gel ◽  
Printing Method

Purpose This paper aims to propose a suitable atomizing solidification chitosan (CS) gel liquid extrusion molding technology for the three dimensional (3D) printing method, and experiments verify the feasibility of this method. Design/methodology/approach This paper mainly uses experimental means, combined with theoretical research. The preparation method, solidification forming method and 3D printing method of CS gel solution were studied. The CS gel printing mechanism and printing error sources are analyzed on the basis of the CS gel ink printing results, printing performance with different ratios of components by constructing a gel print prototype, experiments evaluating the CS gel printing technology and the effects of the process parameters on the scaffold formation. Findings CS printing ink was prepared; the optimal formula was found; the 3 D printing experiment of CS was completed; the optimal printing parameters were obtained; and the reliability of the forming prototype, printing ink and gel printing process was verified, which allowed for the possibility to apply the 3 D printing technology to the manufacturing of a CS gel structure. Originality/value This study can provide theoretical and technical support for the potential application of CS 3 D printed gels in tissue engineering.

3D Printing in Dentistry—State of the Art

2020 ◽  
Vol 45 (1) ◽  
pp. 30-40 ◽  
Author(s):  
A Kessler ◽  
R Hickel ◽  
M Reymus
Keyword(s):  
3D Printing ◽  
Clinical Application ◽  
Industrial Revolution ◽  
Rapid Development ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Fused Filament Fabrication ◽  
Digital Light Processing ◽  
Materials Used ◽  
Binder Jetting

SUMMARY Three-dimensional (3D) printing is a rapidly developing technology that has gained widespread acceptance in dentistry. Compared to conventional (lost-wax technique) and subtractive computer numeric controlled methods, 3D printing offers process engineering advantages. Materials such as plastics, metals, and ceramics can be manufactured using various techniques. 3D printing was introduced over three decades ago. Today, it is experiencing rapid development due to the expiration of many patents and is often described as the key technology of the next industrial revolution. The transition to its clinical application in dentistry is highly dependent on the available materials, which must not only provide the required accuracy but also the necessary biological and physical properties. The aim of this work is to provide an up-to-date overview of the different printing techniques: stereolithography, digital light processing, photopolymer jetting, material jetting, binder jetting, selective laser sintering, selective laser melting, and fused filament fabrication. Additionally, particular attention is paid to the materials used in dentistry and their clinical application.

scholarly journals Investigation of tribo-mechanical properties and structure of specimens obtained by selective laser melting of stainless steel powders

2018 ◽  
Vol 207 ◽  
pp. 03015
Author(s):  
Leonid Belyaev ◽  
Aleksey Zhdanov ◽  
Valentin Morozov
Keyword(s):  
Stainless Steel ◽  
Focal Point ◽  
Radiation Power ◽  
Focal Length ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Steel Powder ◽  
Hardness Measurement ◽  
Quality Parameters ◽  
Length Range

The article presents experimental data about the quality parameters of the stainless steel three-dimensional parts obtained by the selective laser sintering procedure. The results of the porosity, tribological properties, tensile test, hardness measurement and density for different values of the focal point position during the engineering process of the three-dimensional parts sintering were given. For parts made from steel powder CL20ES at a laser radiation power of 200 W in a different focal length range, it is demonstrate that the specimens with the highest density and microhardness values are obtained during the synthesis by using a converging laser beam.

Spheroidization by Plasma Processing and Characterization of Stainless Steel Powder for 3D Printing

2017 ◽  
Vol 48 (10) ◽  
pp. 4831-4841 ◽  
Author(s):  
Lina Ji ◽  
Changzhen Wang ◽  
Wenjie Wu ◽  
Chao Tan ◽  
Guoyu Wang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
3D Printing ◽  
Plasma Processing ◽  
Steel Powder ◽  
Stainless Steel Powder

scholarly journals Modelling and Investigation of Crack Growth for 3D-Printed Acrylonitrile Butadiene Styrene (ABS) with Various Printing Parameters and Ambient Temperatures

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3737
Author(s):  
Yousef Lafi A. Alshammari ◽  
Feiyang He ◽  
Muhammad A. Khan
Keyword(s):  
3D Printing ◽  
Crack Growth ◽  
Three Dimensional ◽  
Acrylonitrile Butadiene Styrene ◽  
Fused Deposition Modelling ◽  
Structural Dynamic ◽  
Fused Deposition ◽  
Nozzle Size ◽  
Printing Parameters ◽  
Butadiene Styrene

Three-dimensional (3D) printing is one of the significant industrial manufacturing methods in the modern era. Many materials are used for 3D printing; however, as the most used material in fused deposition modelling (FDM) technology, acrylonitrile butadiene styrene (ABS) offers good mechanical properties. It is perfect for making structures for industrial applications in complex environments. Three-dimensional printing parameters, including building orientation, layers thickness, and nozzle size, critically affect the crack growth in FDM structures under complex loads. Therefore, this paper used the dynamic bending vibration test to investigate their influence on fatigue crack growth (FCG) rate under dynamic loads and the Paris power law constant C and m. The paper proposed an analytical solution to determine the stress intensity factor (SIF) at the crack tip based on the measurement of structural dynamic response. The experimental results show that the lower ambient temperature, as well as increased nozzle size and layer thickness, provide a lower FCG rate. The printing orientation, which is the same as loading, also slows the crack growth. The linear regression between these parameters and Paris Law’s coefficient also proves the same conclusion.

An Apparatus Designed for Coating and Coloration of Filaments Used in Fused Filament Fabrication (FFF) 3D Printing

2021 ◽  
Vol 14 ◽  
Author(s):  
Piyush Chohan ◽  
Aniket Yadav ◽  
Ranvijay Kumar ◽  
Raman Kumar ◽  
Jasgurpreet Singh Chohan
Keyword(s):  
3D Printing ◽  
Surface Finish ◽  
Three Dimensional ◽  
Layer By Layer ◽  
Fused Filament Fabrication ◽  
Outlet Port ◽  
Inlet Port ◽  
Uniform Coating ◽  
Good Surface ◽  
Good Surface Finish

Background: Three dimensional (3D) printing is emerging technology, capable of manufacturing a solid layer by layer. With the advancements of materials for 3D printing, this technology is applicable in almost every sector. But in accordance with the product requirements we need to modify the mechanical properties of material. To achieve good surface finish we require coating of filament. For this purpose an apparatus is designed for coating of material over a filament, which is capable of coating filaments uniformly and with automated process. Objective: The objective of present invention is directed to a filament feeding device for applying uniform coating on a filament in order to make 3D solid objects with good quality finishing, thereby eliminating the chances of strains and imperfect coating on the filament. Methods: The present invention relates to a filament feeding device, comprising a container equipped within the device for storing a chemical solution in a liquefied form, an inlet port fabricated on the container for inserting a filament inside the container, plurality of relief valves placed at a bottom portion of the container for controlling the leakage of the filaments during insertion of the filaments. A stepper motor in association with a blade equipped within the container to rotate the main extruder of a 3D printer, and an outlet port designed opposite to the inlet port for discharging the filament from the container for 3D printing of the filament in order to manufacture the solid object. Results: The apparatus makes it easy for coating and coloration of materials to make the reinforced composite filaments. As this apparatus provides uniform coating of material on the filaments, the product printed by filaments have good surface finish. Conclusion: The proposed method can reduce coating time and printing time. This work provides meaningful implication to researchers who are doing research in the domain of additive manufacturing.

Sign in / Sign up

Export Citation Format

Share Document