Mechanical Properties of 3D-Printed Maraging Steel Induced by Environmental Exposure
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Authors
Ansell, Troy Y.
Ricks, Joshua P.
Park, Chanman
Tipper, Chris S.
Luhrs, Claudia C.
Subjects
additive manufacturing
selective laser melting
corrosion
environmental testing
selective laser melting
corrosion
environmental testing
Advisors
Date of Issue
2020
Date
2020
Publisher
MDPI
Language
Abstract
Changes in the mechanical properties of selective laser melted maraging steel 300 induced by exposure to a simulated marine environment were investigated. Maraging steel samples were printed in three orientations: vertical (V), 45◦ (45), and horizontal (H) relative to the print bed. These were tested as-printed or after heat-treatment (490 ◦C, 600 ◦C, or 900 ◦C). One set of specimens were exposed in a salt spray chamber for 500 h and then compared to unexposed samples. Environmental attack induced changes in the microstructural features and composition were analyzed by scanning electron microscopy and energy dispersive spectroscopy respectively. Samples printed in the H and 45◦ directions exhibited higher tensile strength than those printed in the V direction. Corrosion induced reduction in strength and hardness was more severe in specimens heat-treated between 480 ◦C and 600 ◦C versus as-printed samples. The greatest decrease in tensile strength was observed for the 45◦-printed heat-treated samples after exposure. A comparison between additive and subtractive manufactured maraging steel is presented.
Type
Article
Description
The article of record as published may be found at https://doi.org/doi:10.3390/met10020218
Series/Report No
Department
Mechanical and Aerospace Engineering (MAE)
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
This research was funded by the Naval Postgraduate School through the Naval Research Program, grants NPS-19-M283-A and NPS-19-N180-A.
Funding
This research was funded by the Naval Postgraduate School through the Naval Research Program, grants NPS-19-M283-A and NPS-19-N180-A.
Format
11 p.
Citation
Ansell, Troy Y., et al. "Mechanical Properties of 3D-Printed Maraging Steel Induced by Environmental Exposure." Metals 10.2 (2020): 218.
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.