A New Science-Based Paradigm Enabling Microstructure-Tailored Additive Manufacturing of Metals

Manyalibo Matthews | 18-SI-003

Executive Summary

We are developing new capabilities in the design and production of additively manufactured metal parts with tailored microstructures that meet stringent performance requirements for certification. This research has broad applications to industry and directly supports national missions in nuclear weapons life extension.

Publications, Presentations, and Patents

Matthews, M. 2020a. "Analysis of Laser-Induced Microcracking in Tungsten Under Additive Manufacturing Conditions: Experiment and Simulation." Acta Materialia 194:464-472. LLNL-JRNL-805870

——— 2020b. "Controlling Interdependent Meso-Nanosecond Dynamics and Defect Generation in Metal 3D Printing." Science 368 (6491):660-665. doi:10.1126/science.aay7830. LLNL-JRNL-774900

——— 2020c. "Microstructural Control in Metal Laser Powder Bed Fusion Additive Manufacturing Using Laser Beam Shaping Strategy."Acta Materialia 184:284–305. LLNL-JRNL-782838

Matthews, M., et al. 2020. "Temperature Measurement of Laser-Irradiated Metals Using Hyperspectral Imaging." Physical Review Applied 14 (014031). LLNL-JRNL-801599

Roehling, T., et al. 2020. "Controlling Grain Morphology, Grain Size, and Crystallographic Texture by Laser Beam Shaping in Metal Additive Manufacturing." Materials and Design 195 (109071). LLNL-JRNL-805378