Influence of carbon nanotubes on microstructure and corrosion performance of additively manufactured 316L stainless steel

被引：7
作者：
Vukkum, Venkata Bhuvaneswari [1 ]
Christudasjustus, Jijo [1 ,2 ]
Ansell, Troy Y. [3 ]
Nieto, Andy [3 ]
Gupta, Rajeev Kumar [1 ]
机构：
[1] North Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA
[2] Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, Richland, WA USA
[3] Naval Postgrad Sch, Dept Mech & Aerosp Engn, Coatings & Composites Extreme Environm Lab CE 2, Monterey, CA 93943 USA
来源：
CORROSION SCIENCE | 2023年 / 224卷
基金：
美国国家科学基金会;
关键词：
Additive manufacturing; Laser powder bed fusion; Corrosion; Stainless steel; Feedstock; Carbon nanotubes; METASTABLE PITTING CHARACTERISTICS; PROCESS PARAMETERS; DENSIFICATION BEHAVIOR; MECHANICAL-PROPERTIES; POWDER; NANOCOMPOSITES; TEMPERATURE; INCLUSIONS; RESISTANCE; INITIATION;
D O I：
10.1016/j.corsci.2023.111494
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Laser powder bed fusion (LPBF) was performed on feedstock-modified 316L stainless steel powder with 1 and 2 vol% carbon nanotubes (CNT). The corrosion resistance was evaluated following cyclic potentiodynamic polarization tests conducted in 0.6 M NaCl at room temperature, 35 and 50 degrees C, and immersion tests in 6 % FeCl3. The CNT addition has increased the pitting potential and decreased number of pits formed during immersion in FeCl3 solution, which could be attributed to Mn-Si-O nano inclusions refinement and segregation of chromium around the inclusions. The observed corrosion behavior was correlated with the altered microstructure due to CNT addition.
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页数：13
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