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 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.

Mechanical and corrosion properties of CoCrFeNiTi-based high-entropy alloy additive manufactured using selective laser melting

2019 ◽  
Vol 25 ◽  
pp. 412-420 ◽  
Author(s):  
Tadashi Fujieda ◽  
Meichuan Chen ◽  
Hiroshi Shiratori ◽  
Kosuke Kuwabara ◽  
Kenta Yamanaka ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
High Entropy Alloy ◽  
Laser Melting ◽  
Corrosion Properties ◽  
High Entropy ◽  
Mechanical And Corrosion Properties

scholarly journals Manufacturing of corrosion-resistant steel 316L using additive technologies as a way to increase its corrosion resistance

2021 ◽  
Vol 279 ◽  
pp. 01012
Author(s):  
Daria Popkova ◽  
Arkadiy Zhilyakov ◽  
Sergey Belikov ◽  
Alexander Abramov ◽  
Oleg Bazhenov
Keyword(s):  
Corrosion Resistance ◽  
Selective Laser Melting ◽  
Additive Technologies ◽  
Second Phase ◽  
Laser Melting ◽  
Corrosion Properties ◽  
Corrosion Resistant ◽  
Temperature Range ◽  
Second Phases ◽  
Kinetics Of

Austenitic steel 316L is a common corrosion-resistant structural material used in a variety of industries from food to nuclear. There is a well-known tendency of steel 316L to precipitate second phases in the temperature range of 500 ... 800 ° С. During operation in this temperature range, degradation of corrosion properties occurs for a long time. Materials and parts obtained by modern methods of additive technologies are of great interest, since this method of alloys processing affects the thermodynamic equilibrium of the system and the kinetics of the release of second phases in aging alloys. The ability to control the kinetics of second phase formation is one of the key factors for improving the corrosion resistance of alloys. In this work, the effect of the method of steel 316L manufacturing (traditional and selective laser melting) on corrosion resistance at a temperature of 750 ° C for 100 hours in a KCl-NaCl environment was estimated. Corrosion tests were carried out, as a result of which it was found that a sample of 316L steel obtained by the method of selective laser melting has the lowest corrosion rate..

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.

scholarly journals Effect of Selective Laser Melting on Microstructure, Mechanical, and Corrosion Properties of Biodegradable FeMnCS for Implant Applications

2020 ◽  
Vol 22 (10) ◽  
pp. 2000182
Author(s):  
Julia Hufenbach ◽  
Jan Sander ◽  
Fabian Kochta ◽  
Stefan Pilz ◽  
Andrea Voss ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Laser Melting ◽  
Corrosion Properties ◽  
Mechanical And Corrosion Properties
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