Sep, 2026
Conference Paper
Publications
Showing 72 results for Author: Govindarajan Muralidharan
Mar, 2026
Conference Paper
Unsupervised Clustering and Supervised Regression Learning to Select High Temperature Oxidation-Resistant Materials
High temperature oxidation and corrosion degradation mechanisms dictate the lifetime of materials critical to energy production. The combination of modeling and experimental approaches such as machine learning (ML) and data analytics, with sufficient experimental data, can accelerate the development of new materials while limiting its cost. In the present work, ML will be…
Dec, 2025
Journal
Effect of post-weld heat treatment on microstructure and mechanical properties of rotary inertia friction welded dissimilar 422-4140 martensitic steel piston joints☆
The study investigated how post‐weld heat treatment (PWHT) temperature affects the microstructure and localized deformation/fracture during bend testing of rotary inertia friction welds (RIFW) between AISI 422 stainless steel and AISI 4140 steel. RIFW produced a fully martensitic interface with approximately 550 HV hardness in both the thermo-mechanically affected (TMAZ) a…
Dec, 2025
Journal
Overcoming the Thermal Conductivity Versus Oxidation Resistance Barrier in High-Temperature Steels
Heat-resistant steels with high chromium additions (≥5 weight percent) are critical for many high temperature energy and manufacturing applications, including heat exchangers, pistons for engines, and dies for metal working and casting. However, while high chromium additions increase oxidation resistance at elevated temperatures, they also compromise thermal conductivity,…
Aug, 2025
ORNL Report
Development of Engine Valve Materials for Next Generation Higher Efficiency Engines
Jun, 2024
Conference Paper
Recent Developments in Cast Alumina-Forming Austenitic Stainless Steel Furnace Rolls
Dec, 2023
Journal
Effect of Trace Levels of Si on Microstructure and Grain Boundary Segregation in DOP-26 Iridium Alloy
The thermodynamics and kinetics of Silicon (Si) segregation to grain boundaries in Iridium alloy DOP-26 with added trace levels of Si of 6, 11, 29, and 36 wppm was studied by Auger Electron Spectroscopy. The four alloys were annealed at 1500 or 1535 °C for 19 or 76 hours followed by cooling at three different rates. Si enrichment at the grain boundaries (GB) increased with…