Showing 125 results for Author: Ying Yang
Sep, 2026
Journal
The V-4Cr-4Ti (V44) alloys have been proposed as the prime candidate structural material for self-cooled liquid Li blanket and other designs for fusion energy applications. However, the applications of the V44 alloy are limited to a narrow operation temperature window, due to reduction in creep strength at or above 700 °C and susceptibility to irradiation hardening and emb…
Sep, 2026
ORNL Report
Aug, 2026
Conference Paper
Oak Ridge National Laboratory (ORNL) has recently launched an effort to economically expand the North American aluminum supply chain by designing and developing a new family of Al-Mg-Si-Fe-Mn structural die cast aluminum alloys that can be made from up to 100% mixed 5xxx and 6xxx series automotive post-consumer sheet scrap and do not require heat treatment. The goal is to…
Aug, 2026
Journal
Non-equilibrium phase formation and the interaction between the nucleation and solidification of competing phases are significant challenges in aluminum alloy design, as key properties such as ductility heavily depend on the grain morphologies and phases present in solidified castings. This manuscript expands upon existing multiphase cellular automata (CA) modeling work to…
May, 2026
Journal
As-solidified microstructures of near-eutectic alloys often contain multiple primary phases that are not expected from equilibrium phase diagrams. Such microstructures are caused by cooling-rate-dependent solidification pathways, a factor not captured by the Scheil–Gulliver model or variations thereof. Here, we present a model and algorithm that incorporate the critical nu…
Mar, 2026
Journal
Grain boundary segregating alloys, a class of alloys designed such that nanocrystalline grain sizes are thermodynamically stabilized by the presence of high segregation energy solutes at the grain boundaries, are typically produced through geometrically limited processing techniques such as equal channel angular extrusion or thin film sputtering. This study explores the us…
Mar, 2026
Conference Paper
There is a growing trend to die cast structural automotive components from scrap aluminum sources to reduce embodied energy and cost. However, the ability to include most post-consumer scrap is severely limited due to the sensitivities of current industrial high pressure die cast (HPDC) Al alloys to Fe impurities introduced during the recycling process. This study characte…
Jan, 2026
Journal
To explore the feasibility of using laser powder bed fusion systems to print bulk amorphous Al alloys, a single autogenous weld produced by laser remelting on a cast Al-5La-9Ni (at.%) alloy was studied for its microstructure and mechanical behavior. The solidification rates experienced by material within the welds were high enough to produce entirely amorphous regions with…
Dec, 2025
Journal
As the US fusion materials community awaits the selection and design of a fusion prototypical neutron source (FPNS), a risk reduction exercise has been conducted to (i) provide an updated materials performance evaluation using state-of-the-art computational materials modeling, (ii) expand on legacy analysis based on pure Fe to other relevant fusion structural materials typ…
Sep, 2025
Journal
This study proposes a graded structure via additive manufacturing for divertor and first wall blanket applications in fusion reactors. Materials were selected based on thermodynamic calculations to operate from 1100 °C at the plasma-facing level to 550 °C at the structural steel level. Conventional joining methods often lead to failures due to discrete reaction layers with…