Technical University of Denmark, Denmark

Vania Marisol Rodriguez Herrejon

Biography

Vania Marisol Rodriguez Herrejon is a Postdoctoral Researcher in the Department of Civil and Mechanical Engineering at the Technical University of Denmark (DTU). She hold both a Master’s and a Ph.D. in Materials Science and Engineering, where my research has focused on the relationship between processing, microstructure, and mechanical performance of metallic materials. Her expertise lies in advanced materials characterization, mechanical testing, and non-destructive evaluation techniques aimed at understanding and optimizing material behavior under demanding service conditions. Throughout our academic and research career, she had worked extensively with a wide range of manufacturing processes, including spray forming, casting, and several additive manufacturing technologies such as Laser Powder Bed Fusion (LPBF), Binder Jetting (BJ), and Directed Energy Deposition (DED). Her work has centered on developing and characterizing high-performance alloys, particularly Inconel, duplex stainless steels, tool steels, and maraging steels, to improve their mechanical strength, fatigue resistance, and microstructural stability. At DTU, she is currently engaged in research focused on the additive manufacturing of steels, exploring microstructure evolution, defect formation, and the connection between process parameters and mechanical properties. Her work combines experimental methods with microstructural and mechanical analyses to support the development of efficient and sustainable manufacturing strategies. Driven by curiosity and precision, she aims to contribute to the advancement of next-generation metallic materials and processing technologies that meet the needs of modern engineering applications.

Conferences

Room

Date

Hour

Subject

Room 8

25-03-2026

11:35 am – 11:55 am

103 Improving additive manufacturing efficiency and performance through core-shell process parameter optimization in LPBF maraging steel

Conferences Details

103 Improving additive manufacturing efficiency and performance through core-shell process parameter optimization in LPBF maraging steel

Laser Powder Bed Fusion (LPBF) enables the fabrication of high-performance metallic components with intricate geometries; however, low productivity and elevated costs present significant barriers to widespread industrial adoption. In this work, a core-shell strategy was introduced to improve the efficiency of LPBF processing of maraging 300 steel without compromising mechanical integrity. The approach involves producing components with a dense shell and a rapidly scanned core, achieved by adjusting process parameters to enhance the build rate. A comprehensive evaluation of the resulting components included density measurements, hardness mapping, tensile and fatigue testing, as well as microstructural analysis through X-ray computed tomography. The as-built core-shell maraging steel exhibited a heterogeneous structure characterized by distinct core and shell regions that were fully bonded. Despite the increased scanning speed and reduced energy input in the core, the material displayed high density, uniform mechanical response, and favorable fatigue resistance. Microstructural examination revealed a martensitic matrix featuring fine precipitation of intermetallic particles, which significantly contributed to the material’s mechanical performance. Overall, the core-shell strategy significantly demonstrated a marked improvement in LPBF productivity without compromising strength, ductility, or fatigue performance, thus offering a promising route toward sustainable and efficient additive manufacturing of maraging steels.

An event by Metal AMS – Metal Additive Manufacturing Synergy