Mar, 2027
ORNL Report
Residual Stress Development and Deformation of Wire-Arc Direct Energy Deposition Parts
Dec, 2026
Journal
Ductility control in an additively manufactured Al-7Si-0.3Mg-0.5Cu-1Fe alloy through heat treatments
Iron is a key ductility-limiting impurity in secondary Al-Si alloys that is responsible for impeding their widespread use in structural applications. An Al-7Si-0.3 Mg alloy with 0.5% Cu and 1% Fe (all in wt.%) was fabricated via laser powder-bed fusion to explore new microstructure engineering pathways with this processing route. While highly refined β-Al5FeSi intermetalli…
Nov, 2026
Journal
Thermally controlled absorber for enhanced point-source CO2 capture: Scaling up the process intensification packing technology
This work describes a pilot-scale, thermally controlled gas–liquid absorption column designed for point-source carbon dioxide (COâ‚‚) capture, featuring a 4-m tall, 0.3-m diameter absorber with a capacity of up to 1 t of COâ‚‚ per day. Flue-gas conditions are simulated using a natural gas-fired power generation engine. A key advancement is the integration of a 3D-printed proce…
Oct, 2026
Journal
DFT-based surrogate kinetic models for chlorosilane-mediated surface reactions on silicon carbide: the silicon-incorporation subnetwork
The increasing demand for high-performance silicon carbide (SiC)-based materials in advanced technologies highlights the need for a fundamental understanding of the surface chemistry governing SiC growth during chemical vapor infiltration (CVI). However, existing kinetic models often rely heavily on empirical fitting and lack sufficient atomistic detail, which limits their…
Oct, 2026
Conference Paper
Unified Relational GNN Architecture for AC Optimal Power Flow Calculations
Solving the AC optimal power flow (OPF) problem remains a computationally intensive task, particularly for large-scale power networks where real-time decision-making is critical. Traditional numerical solvers, while precise, are often too slow for deployment in dynamic environments. Recent data-driven approaches, including fully connected neural networks and standard graph…
Oct, 2026
ORNL Report
From Roadmap to Response: A Community Assessment of Autonomous Science
Autonomous science couples instruments, robots, data systems, and AI agents into workflows that plan and interpret experiments with progressively less human intervention, and a two-year community roadmap published in July 2026 set eighteen milestones for the field. The second Annual Autonomous Workflows Workshop was convened to write such a roadmap and, finding one already…
Oct, 2026
Journal
Composition dependence of the critical Rayleigh number curve for macrosegregation in multicomponent metal alloys
Convective instabilities in the semi-solid mushy zone can trigger channel formation that leads to defects known as freckles, channel segregates and A-type segregates. Using Flemings’ model, we determine conditions for the onset of local remelting when buoyancy-driven flow is suddenly triggered in an initially stagnant mushy zone. An expression in the form of a Rayleigh num…
Oct, 2026
Book Chapter
Probabilistic Forecasting of U.S. County-Level Suicide Mortality Rates (2005–2020): Assessing the Impact of Social Determinants of Health
Understanding the factors that contribute to county-level suicide rates in the U.S. is essential for guiding effective resource allocation and policy interventions. This study introduces a novel approach to incorporating Social Determinants of Health (SDoH) into probabilistic time-series forecasting models to improve predictive accuracy. We applied time-series models to tw…
Oct, 2026
ORNL Report
Data and AI Systems FY 2026 Highlights
The Data and AI Systems Section of the Computer Science and Mathematics Division at Oak Ridge National Laboratory conducts research on the data and artificial intelligence foundations of scientific discovery, shortening and automating the path from instrument and simulation to insight at the scale of leadership computing facilities. This report collects 27 project highligh…