scholarly journals Study on Preparation of Superhydrophobic Surface by Selective Laser Melting and Corrosion Resistance

2021 ◽  
Vol 11 (16) ◽  
pp. 7476
Author(s):  
Lei Xing ◽  
Jingui Yu ◽  
Zhiyong Ji ◽  
Xingjiu Huang ◽  
Chaoyuan Dai ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Selective Laser Melting ◽  
Superhydrophobic Surface ◽  
Sample Surface ◽  
Test Results ◽  
Laser Melting ◽  
Root Cause ◽  
Interface Characteristics ◽  
Aerospace Medical ◽  
3D Printed

Superhydrophobic surfaces are used in aerospace, medical equipment, transportation, household appliances and other fields due to their special interface characteristics. In this paper, a superhydrophobic surface is prepared by Selective Laser Melting (SLM) 3D-printed technology, comparing the effects of different post-treatment methods and time on corrosion resistance, and revealing the root cause of the transition from hydrophilic to superhydrophobic. The test results show that for samples not treated with fluoro-silane, the microstructure adsorbs the organic matter in the air and reduces the surface energy, which is the root cause of the sample surface changing from hydrophilic to superhydrophobic. In addition, the corrosion resistance of 3D-printed, polished, 3D-printed + modified, and 3D-printed + corroded samples are analyzed. Among them, 3D-printed + modified samples have a longer resistance to corrosion, and after placing in outdoor natural conditions for 60 days, the contact angle of water droplets on the surface is 150.8°, which still has superhydrophobic properties and excellent natural durability.

Anisotropic corrosion resistance of TiC reinforced Ni-based composites fabricated by selective laser melting

2019 ◽  
Vol 35 (6) ◽  
pp. 1128-1136 ◽  
Author(s):  
Hongmei Zhang ◽  
Dongdong Gu ◽  
Lixia Xi ◽  
Han Zhang ◽  
Mujian Xia ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Selective Laser Melting ◽  
Laser Melting

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.

Improved Corrosion Resistance on Selective Laser Melting Produced Ti-5Cu Alloy after Heat Treatment

2018 ◽  
Vol 4 (7) ◽  
pp. 2633-2642 ◽  
Author(s):  
Peng Qin ◽  
Yujing Liu ◽  
Timothy B. Sercombe ◽  
Yuhua Li ◽  
Chuanwei Zhang ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Corrosion Resistance ◽  
Selective Laser Melting ◽  
Laser Melting

scholarly journals Development of new approaches to the study of pitting corrosion resistance of stainless steels obtained by selective laser melting

2019 ◽  
Vol 121 ◽  
pp. 01011
Author(s):  
Olga Parmenova ◽  
Svetlana Mushnikova ◽  
Vitaliy Bobyr ◽  
Evgeniy Samodelkin
Keyword(s):  
Corrosion Resistance ◽  
Selective Laser Melting ◽  
Pitting Corrosion ◽  
Stainless Steels ◽  
Laser Scanning ◽  
Corrosion Behaviour ◽  
Steel Corrosion ◽  
Scanning Speed ◽  
Laser Melting ◽  
Initial State

This paper presents the results of comparative corrosion resistance studies of stainless steels manufactured by selective laser melting (SLM) in the initial state with subsequent heat treatment and machining. Pitting corrosion tests are carried out, according to ASTM G48 method A in 10% FeCl3·6H2O solution at elevated temperature and exposure time for 5h. The studies were performed on the AISI 321 and AISI 316L stainless steels manufactured by SLM. It was obtained that laser scanning speed decrease led to density rise by other SLM parameters being equal. Porosity affected to the stainless steel corrosion behaviour significant. Metal density decrease resulted to corrosion rate rise. Microstructure examination showed that pitting corrosion development depended on surface steel condition.

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..

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