Date of Award
2024
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Materials Science
Committee Chair
Judy Schneider
Committee Member
Jeffrey Weimer
Committee Member
Oladapo Eso
Research Advisor
Judy Schneider
Subject(s)
Additive manufacturing, Thin-walled structures, Heat resistant materials, Tungsten, Rhenium, Tungsten alloys
Abstract
W-24Re is a refractory alloy used in high temperature applications due to its high melting point, recrystallization temperature, and tensile strength. Due to the high melting point, fabrication is more commonly achieved through powder metallurgy processing, which relies on diffusion. As the material is available as a powder, it is a good candidate for laser-powder bed fusion (L-PBF) processing. This study focuses on characterization of L-PBF of W-24Re thin-walled structures to determine the feasibility and primary failure mechanisms under tension compared to that of bulk W-24Re. A laser parameter set was developed, and samples were provided by Quadrus Corporation for characterization of the material in this study. Through comparison of voids, grain size, microhardness, x-ray diffraction, and tension testing for various specimens, a failure mechanism and potential crack mitigation strategy are proposed. This information can be used in further development of L-PBF W-24Re thin-walled structures to optimize mechanical properties.
Recommended Citation
Rushing, Madelyne, "Characterization of thin-walled W-24Re structures fabricated using laser-powder bed fusion" (2024). Theses. 722.
https://louis.uah.edu/uah-theses/722