May, 2025
ORNL Report
Publications
Showing 25 results for Author: Soumya Nag
Aug, 2024
Journal
Multiscale characterization of an additively manufactured property graded Ni-base alloy for molten-saltssupercritical-CO2 heat exchangers
The sequential optimization of strength and corrosion resistance in conventional alloy design procedures often results in a tradeoff between environmental degradation and optimal mechanical properties. A concurrent optimization of these two material properties is essential to efficiently develop high temperature alloys that can withstand harsh environments increasingly req…
Aug, 2024
ORNL Report
Investigation on High Entropy Alloys and their potential use in Missile Applications
Apr, 2024
Journal
Impact of titanium content on the thermo-mechanical and oxidation response of TiAlTa
This study aimed to analyze how the addition of titanium (Ti) to TiAlTa alloys affects their mechanical properties (Young’s modulus and hardness) and oxidation behavior. Alloys with three different Ti additions and equi-atomic Al and Ta were fabricated with nominal compositions of 33Ti-33Al-33Ta at%, 50Ti-25Al-25Ta at%, and 70Ti-15Al-15Ta at%. Phase identification of as-pr…
Jan, 2024
Journal
Leveraging Additive Manufacturing to Fabricate High Temperature Alloys With Co-Designed Mechanical Properties and Environmental Resistance
A paradigm shift in the traditional sequential design approaches is critically essential to create application-specific hierarchical and multifunctional materials with superior long-term performance for next-generation energy technologies involving extreme environments. In the current work, we aim to leverage the flexibility and geometric/compositional complexity offered b…
Nov, 2023
Journal
Impact of titanium content on the thermo-mechanical and oxidation response of TiAlTa
This study aimed to analyze how the addition of titanium (Ti) to TiAlTa alloys affects their mechanical properties (Young’s modulus and hardness) and oxidation behavior. Alloys with three different Ti additions and equi-atomic Al and Ta were fabricated with nominal compositions of 33Ti-33Al-33Ta at%, 50Ti-25Al-25Ta at%, and 70Ti-15Al-15Ta at%. Phase identification of as-pr…
Nov, 2023
Journal
Exploring Gradient Pathways in High Temperature, Functionally Graded Alloys
A new approach aims to fabricate parts with targeted, site-specific properties for a wide range of applications in extreme environments within the aviation, space, and energy sectors.
Nov, 2023
ORNL Report
IN-SITU MONITORING ASSISTED LARGE-SCALE ADDITIVE MANUFACTURING OF MILD STEEL AND 316L ALLOYS FOR NUCLEAR APPLICATION
The Advanced Materials and Manufacturing Technologies (AMMT) Program is aimed at developing cross-cutting technologies in support of a broad range of nuclear reactor parts, and to maintain U.S. leadership in materials and manufacturing technologies for nuclear energy applications. The overarching vision of the AMMT program is to accelerate the development, qualification, d…