Wear and corrosion behavior of 18Ni-300 maraging steel produced by laser-based powder bed fusion and conventional route
نویسندگان
چکیده
Maraging steels such as 18Ni-300 (1.2709) are characterized by high yield and tensile strength together with good toughness making them interesting materials for aerospace, automotive tooling sectors well bearing gears parts. The low carbon martensite matrix combined the nanosized intermetallic precipitates responsible peculiar mechanical properties. Thanks to very content, these easily weldable therefore suitable additive manufacturing (AM) techniques, laser-based powder bed fusion (LPBF). Indeed, this technique was recently adopted in molding industry produce inserts conformal cooling channels capable improve cores lifetime enhancing productivity. These types of components usually undergo severe stress conditions, wear phenomena even aggressive environments. This work aims at comparing tribological corrosion behaviour 1.2709 maraging steel samples produced both forging LPBF technique. Conventional were investigated after solution annealing aging treatment while AM directly aged. Aging parameters chosen achieve same hardness values production conditions. Samples sliding through pin-on-disc tests using 100Cr6 ball counterpart (ASTM G99) three different velocities, potentiodynamic polarization measurements G3) conducted 3.5 wt % NaCl solution. Microstructural analyses carried out on as-aged samples. damage mechanism means scanning electron microscope (SEM). For considered heat treatment, results show only small differences behaviors between forged samples, despite microstructural morphology, demonstrating reliability components.
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ژورنال
عنوان ژورنال: Procedia structural integrity
سال: 2022
ISSN: ['2452-3216']
DOI: https://doi.org/10.1016/j.prostr.2022.12.104