scholarly journals Numerical and experimental assessment of the static behavior of 3D printed reticular Al structures produced by Selective Laser Melting: progressive damage and failure

2018 ◽  
Vol 12 ◽  
pp. 204-212 ◽  
Author(s):  
Franco Concli ◽  
Andrea Gilioli
Keyword(s):  
Selective Laser Melting ◽  
Progressive Damage ◽  
Laser Melting ◽  
Static Behavior ◽  
Experimental Assessment ◽  
Damage And Failure ◽  
3D Printed

scholarly journals Fracture Toughness of Hybrid Components with Selective Laser Melting 18Ni300 Steel Parts

2018 ◽  
Vol 8 (10) ◽  
pp. 1879 ◽  
Author(s):  
Luis Santos ◽  
Joel de Jesus ◽  
José Ferreira ◽  
José Costa ◽  
Carlos Capela
Keyword(s):  
Fracture Toughness ◽  
Selective Laser Melting ◽  
Compact Tension ◽  
Powder Materials ◽  
Layer By Layer ◽  
Laser Melting ◽  
Conventional Steel ◽  
Scan Rate ◽  
Aisi H13 ◽  
3D Printed

Selective Laser Melting (SLM) is currently one of the more advanced manufacturing and prototyping processes, allowing the 3D-printing of complex parts through the layer-by-layer deposition of powder materials melted by laser. This work concerns the study of the fracture toughness of maraging AISI 18Ni300 steel implants by SLM built over two different conventional steels, AISI H13 and AISI 420, ranging the scan rate between 200 mm/s and 400 mm/s. The SLM process creates an interface zone between the conventional steel and the laser melted implant in the final form of compact tension (CT) samples, where the hardness is higher than the 3D-printed material but lower than the conventional steel. Both fully 3D-printed series and 3D-printed implants series produced at 200 mm/s of scan rate showed higher fracture toughness than the other series built at 400 mm/s of scan rate due to a lower level of internal defects. An inexpressive variation of fracture toughness was observed between the implanted series with the same parameters. The crack growth path for all samples occurred in the limit of interface/3D-printed material zone and occurred between laser melted layers.

Ratcheting Behaviour of 3D Printed and Conventionally Produced SS316L Material

2019 ◽  
Author(s):  
Radim Halama ◽  
Marek Pagáč ◽  
Zbyněk Paška ◽  
Pavel Pavlíček ◽  
Xu Chen
Keyword(s):  
Strain Rate ◽  
Selective Laser Melting ◽  
Low Cycle Fatigue ◽  
Fatigue Tests ◽  
Image Correlation ◽  
Correlation Technique ◽  
Laser Melting ◽  
3D Print ◽  
Melting Technology ◽  
3D Printed

Abstract This paper shows some differences in stress-strain behavior of conventional and 3D print SS316L. First, the influence of strain rate on the monotonic curve has been investigated. Specimens produced by Selective Laser Melting technology were not so sensitive to the strain rate. Viscoplasticity has to be taken into account for cyclic loading modelling in the case of conventionally produced SS316L but not for the 3D printed material. A set of low-cycle fatigue tests was performed on specimens from both used production technologies. Uniaxial ratcheting tests were realized under constant amplitude of stress and varying mean stress. Experimental results show a good ratcheting endurance of SS316L produced by the Selective Laser Melting technology. Biaxial ratcheting tests were realized for 3D print SS316L only. Applied Digital Image Correlation technique makes possible to get more ratcheting curves from each ratcheting test.

Structural evolutions in 3D-printed Fe-based metallic glass fabricated by selective laser melting

2018 ◽  
Vol 23 ◽  
pp. 246-252 ◽  
Author(s):  
Di Ouyang ◽  
Wei Xing ◽  
Ning Li ◽  
Yicheng Li ◽  
Lin Liu
Keyword(s):  
Metallic Glass ◽  
Selective Laser Melting ◽  
Laser Melting ◽  
3D Printed

Silver Electroless Finishing of Selective Laser Melting 3D-Printed AlSi10Mg Artifacts

2019 ◽  
Vol 8 (5) ◽  
pp. 678-692 ◽  
Author(s):  
N. Dresler ◽  
A. Inberg ◽  
D. Ashkenazi ◽  
Y. Shacham-Diamand ◽  
A. Stern
Keyword(s):  
Selective Laser Melting ◽  
Laser Melting ◽  
3D Printed

scholarly journals The effect of surface topography and porosity on the tensile fatigue of 3D printed Ti-6Al-4V fabricated by selective laser melting

2019 ◽  
Vol 98 ◽  
pp. 726-736 ◽  
Author(s):  
Cambre N. Kelly ◽  
Nathan T. Evans ◽  
Cameron W. Irvin ◽  
Savita C. Chapman ◽  
Ken Gall ◽  
...  
Keyword(s):  
Surface Topography ◽  
Selective Laser Melting ◽  
Laser Melting ◽  
Tensile Fatigue ◽  
3D Printed ◽  
Effect Of Surface

scholarly journals Experimental assessment of compensated distortion in selective laser melting of Ti6Al4V parts

2021 ◽  
Vol 1136 (1) ◽  
pp. 012048
Author(s):  
V Stiuso ◽  
P Minetola ◽  
F Calignano ◽  
M Galati ◽  
M S Khandpur ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Laser Melting ◽  
Experimental Assessment

scholarly journals COMPARISON OF THE CORROSION PROPERTIES OF CoCrMo DENTAL ALLOYS IN ARTIFICIAL SALIVA

2021 ◽  
Vol 55 (6) ◽  
Author(s):  
Tadeja Kosec ◽  
Mirjam Bajt Leban ◽  
Matej Kurnik ◽  
Igor Kopač
Keyword(s):  
Electrochemical Properties ◽  
Selective Laser Melting ◽  
Artificial Saliva ◽  
Reference Sample ◽  
Original Material ◽  
Dental Alloys ◽  
Laser Melting ◽  
Corrosion Properties ◽  
3D Printed ◽  
Cocrmo Alloys

CoCrMo alloys are known for their biocompatible properties, which, together with their favorable mechanical properties, mean they can be efficiently used in dentistry. With the development of selective laser melting for the fabrication of 3D printed objects, interest in the corrosion properties of this alloy has risen in the field of prosthodontics. In the study, CoCrMoW dental alloys were studied in artificial saliva at body temperature i.e. 37 °C. Different forms of CoCrMoW alloy were selected: a reference sample, i.e. original material as-received from the supplier, a casted sample acquired from an ordinary procedure in a dental laboratory, and two 3D printed samples made from CoCrMoW powder using the selective laser melting method (SLM). Electrochemical, spectroscopic and hardness measurements were conducted. It was shown that the reference and cast samples have similar microstructural and electrochemical properties, while the electrochemical properties of the 3D printed samples differ, most probably due to the effect of the higher micro porosity and chemical composition of the alloys.

scholarly journals Design Optimisation for 3D printed SLM objects

2021 ◽  
Author(s):  
◽  
Stephen Tane Hill
Keyword(s):  
3D Printing ◽  
Selective Laser Melting ◽  
Manufacturing Process ◽  
Computer Aided Design ◽  
Design Research ◽  
Process Models ◽  
Physical Models ◽  
Laser Melting ◽  
3D Printed

<p>A common misconception about additive manufacturing (3D printing) is that any shape can be made in any material at the press of a button. The reality is that each process and material requires distinct Computer Aided Design (CAD) files that need to be optimised to the physical limitations of the manufacturing process. This optimisation process can have significant effects on the designer’s aesthetic intentions. Selective Laser Melting (SLM) is the new benchmark for functional 3D printed titanium designs where the optimisation process plays an important role in the outcome of the end product. The limitations imposed by the manufacturing process include build support material, heat transfer and post processing and designs are required to be optimised before the manufacturing process can commence. To date, case studies written on the SLM process have focused largely on engineering and functional applications in particular within the medical industry. However; this process has not been extensively studied from a visual and aesthetic industrial design perspective. This research will gather specific knowledge about the technical limitations involved in the Selective Laser Melting process and explore through a case study approach how a designer s intentions can be maintained or even enhanced when using this technology. With greater understanding of the SLM technology, the optimisation process may further provide positive outcomes to the designer by saving time, money and waste.  This case study is built on an existing product design file as a base model. Refinements to the model were made based on findings from existing design research as well as digital and physical models. The existing design research was focused on challenges designers encounter using 3D printing technologies including SLM as well as the optimisation process. Models and design iterations were developed using Nigel Cross’s four step model of exploration, generation, evaluation and communication. By iteratively redesigning aspects of the model to conform to the SLM limitations, this study reviews opportunities for areas to reduce material without compromising the design intent.</p>

Sign in / Sign up

Export Citation Format

Share Document