Publications

Mar, 2026

Conference Paper

Impact of Hydrogen Combustion on the Oxidation-induced Degradation of Heavy-duty Diesel Engine Piston Materials

High temperature ferritic-martensitic steels are candidate materials for heavy-duty diesel engine pistons. The envisioned transition to hydrogen blended fuels is expected to alter the post-combustion atmosphere in the engines, primarily resulting in a higher water vapor content (> 20 vol%) and potentially higher exhaust gas temperatures. The oxidation resistance of existin…

Feb, 2026

ORNL Report

Design Status and Experimental Strategy for Initial Molten Salt Irradiation Experiments in HFIR

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,…

Nov, 2025

Journal

Investigation of Corrosion Behavior of Carbide Phase Strengthened Nickel-Based Alloy in Molten Fluoride Salt

The corrosion behavior of a high creep strength carbide-phase strengthened Ni-based alloy in molten FLiNaK (LiF-NaF-KF: 46.5-11.5-42 mol%) salt in the temperature range of 700°C–750°C has been investigated as a part of the development of structural alloys for fluoride salt-based molten salt reactors (MSRs). The alloy composition was designed based on Hastelloy-N, but with…

Oct, 2025

Journal

Corrosion of 316L Stainless Steel Under the Natural Circulation of Molten NaCl-MgCl2 Salt

The corrosion behavior of 316 L stainless steel (SS) was studied via the natural circulation of molten eutectic NaCl-MgCl2 salt through a microloop. The post-corrosion tested 316 L SS microloop sections were characterized with microscopy techniques to determine the microstructural and microchemical changes that occurred at the alloy/salt interface. It was found that 316 L…

Aug, 2025

ORNL Report

Measure Effects of Molten Halide Salt on Creep Rupture Lifetime for 316H, 709 and 617

Aug, 2025

ORNL Report

Evaluate compatibility of alloy 244 in NaCl-MgCl2

Apr, 2025

ORNL Report

Measure the effect of molten halide salt exposure on creep rupture lifetime

Mar, 2025

Journal

Effect of MgSO4 addition on alkali sulphates induced hot corrosion of a β-NiAl coating

The effect of MgSO4 addition on alkali sulphates induced hot corrosion of a β-NiAl coating was studied by performing a series of tests with deposits of Na2SO4, Na2SO4-20 %K2SO4 and Na2SO4-12 %K2SO4-35 %MgSO4 (mol.% for all) at 700 °C in air with addition of SO2. For elucidating the observed corrosion phenomena, various salt-oxide/NiAl powder mixtures were exposed to the sa…

Mar, 2025

Journal

Assessing Stainless Steel Compatibility in Flowing FLiBe Salt

To address the considerable interest in LiF-BeF2 (FLiBe) compatibility for fission and fusion reactor applications, static and flowing compatibility experiments were conducted to assess the compatibility with type 316H stainless steel. In static testing at 550° and 650 °C, small mass changes were measured and posttest characterization of the FLiBe showed increased levels o…

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

Journal

Evaluation of coated steels in supercritical CO2

The carburizing supercritical CO2 (sCO2) environment limits the use of lower cost steels in the lower temperature (450–650°C) portions of the sCO2 Brayton cycle because of concerns about internal carburization and embrittlement. Results on a ferritic–martensitic steel and conventional and advanced austenitic steels at 450–650°C in 30 MPa sCO2 with and without 1% O2 and 0.1…