RT info:eu-repo/semantics/article
T1 Microstructure–hardness–corrosion performance of 17–4 precipitation hardening stainless steels processed by selective laser melting in comparison with commercial alloy
A1 García Cabezón, Ana Cristina
A1 Castro Sastre, María Ángeles
A1 Fernández Abia, Ana Isabel
A1 Rodríguez Méndez, María Luz
A1 Martín Pedrosa, Fernando
K1 Additive manufacturing
K1 Microstructures
K1 Corrosion
K1 23 Química
K1 33 Ciencias Tecnológicas
AB The 17–4 Precipitation Hardening Stainless Steel (PH SS) manufactured by Selective Laser Melting (SLM) has wide appli-cation perspectives, but they are limited due to defects and anisotropy. The selection of the appropriate process variablesplays a fundamental part in the microstructure and in the determination of the final mechanical and corrosion properties.The main purpose of this study is to analyze the corrosion behavior, hardness and microstructure of 17–4 PH SS manufac-tured by SLM in comparison to the commercial counterparts. The anisotropic behavior was investigated by analyzing themicrostructure–hardness and corrosion interrelationship, both in the surface of the construction platform and in the growthdirection of the element. The corrosion behavior of the SLM 17–4PH SS in its natural state was investigated in relation tothat of the 17–4 PH SS heat treated in a 0.1 M NaCl + 0.5 M H 2 SO 4 solution, using three electrochemical techniques. Theresults confirmed that the corrosion resistance of SLM 17–4 PH SS was considerably better than that of the forging, evenafter 60 days of immersion in the test solution. This was attributed to the absence of important manufacturing defects, tothe fine microstructure with an important amount of austenite produced by SLM, and to a small amount of non-metallicinclusions precipitated as a result of the fast cooling and the high speed of solidification associated with the SLM process.
PB Springer
SN 1598-9623
YR 2022
FD 2022
LK https://uvadoc.uva.es/handle/10324/53347
UL https://uvadoc.uva.es/handle/10324/53347
LA eng
NO Metals and Materials International, 2022.
NO Producción Científica
DS UVaDOC
RD 11-jul-2024