Publications by authors named "X F Jimenez"
Article Synopsis
- A crack-free Stellite-6 alloy was successfully fabricated using a laser powder bed fusion method with a heating module for the first time, involving a heated build plate at 400 °C.
- Two printing combinations (sample A: 300 W/750 mm/s; sample B: 275 W/1000 mm/s) were used, resulting in FCC-Co dendrites and W-rich MC particles, with some gas pores noted that necessitated a hot isostatic pressing (HIP) process at 1250 °C.
- After HIP, sample A showed partial recrystallization and coarsened MC, while sample B experienced complete recrystallization and increased grain growth, with the microhardness post-HIP being slightly higher than traditional
Microstructures and Corrosion Properties of Wire Arc Additive Manufactured Copper-Nickel Alloys.
Materials (Basel)
February 2024
The 70/30 copper-nickel alloy is used mainly in critical parts with more demanding conditions in marine settings. There is a need for innovative methods that offer fast production and cost-effectiveness in order to supplement current copper-nickel alloy manufacturing processes. In this study, we employ wire arc additive manufacturing (WAAM) to fabricate the 70/30 copper-nickel alloy.
View Article and Find Full Text PDFWire-arc directed energy deposition (DED) processed Inconel (IN) 718 is known to have coarse columnar grains, strong texture, and significant chemical and microstructural inhomogeneity in the as-fabricated condition. Homogenization treatment is commonly used prior to aging to eliminate the inhomogeneity and detrimental precipitation for better mechanical properties. In this study, however, direct aging (DA) at 700 °C without homogenization has resulted in room-temperature yield strength, ultimate tensile strength (UTS), and elongation that are comparable to wrought condition and among the highest reported properties for wire-arc DED IN718.
View Article and Find Full Text PDF