A5014537147- Additive Manufacturing Materials and Processes
- Metal and Thin Film Mechanics
- Additive Manufacturing and 3D Printing Technologies
- Fusion materials and technologies
- Nuclear Materials and Properties
- Welding Techniques and Residual Stresses
- Advanced materials and composites
- Ion-surface interactions and analysis
- High Temperature Alloys and Creep
- Titanium Alloys Microstructure and Properties
- Pulsars and Gravitational Waves Research
- Advanced Surface Polishing Techniques
- Cosmology and Gravitation Theories
- Manufacturing Process and Optimization
- Geophysics and Gravity Measurements
- High Entropy Alloys Studies
- Metallurgy and Material Forming
- High-Temperature Coating Behaviors
- High-Velocity Impact and Material Behavior
- Laser-induced spectroscopy and plasma
- Electric and Hybrid Vehicle Technologies
- Fuel Cells and Related Materials
- Aluminum Alloy Microstructure Properties
- Force Microscopy Techniques and Applications
- Icing and De-icing Technologies
National Institute of Standards and Technology
2018-2025
Los Alamos National Laboratory
2016-2022
Center for Integrated Nanotechnologies
2016-2022
Government of the United States of America
2019
National Institute of Standards
2018
Georgia Institute of Technology
2016-2017
Temple University
2010-2012
Louisiana State University
2005-2010
The University of Western Australia
2008
Imperial Oil (Canada)
1997
Recent spherical nanoindentation protocols have proven robust at capturing the local elastic-plastic response of polycrystalline metal samples length scales much smaller than grain size. In this work, we extend these to that include multiple grains recover microindentation stress-strain curves. These new are first established in paper and then demonstrated for Al-6061 by comparing measured indentation curves with corresponding measurements from uniaxial tension tests. More specifically,...
Abstract The Additive Manufacturing Benchmark Test Series (AM Bench) provides rigorous measurement data for validating additive manufacturing (AM) simulations a broad range of AM technologies and material systems. Bench includes extensive in situ ex measurements, simulation challenges the modeling community, corresponding conference series. In 2022, second round challenge problems, were completed, focusing primarily upon laser powder bed fusion (LPBF) processing metals, both extrusion vat...
The additive manufacturing benchmarking challenge described in this work was aimed at the prediction of average stress-strain properties for tensile specimens that were excised from blocks non-heat-treated IN625 manufactured by laser powder bed fusion. Two different scan strategies considered: an X-only raster and XY raster, which involved a 90° rotation direction between subsequent layers. To measure anisotropy, multiple orientations with respect to build investigated (e.g., parallel,...
Abstract Additive manufacturing of metal alloys produces microstructures that are typically very different from those produced by more traditional approaches. Computer simulations useful for connecting processing, structure, and performance these materials, but validation data span this full range is difficult to produce. This research part a broad effort the Manufacturing Benchmark Test Series produce such datasets laser powder bed fusion builds nickel Alloy 718. Here, single tracks with...
The Additive Manufacturing Benchmark Series (AM Bench) is a NIST-led organization that provides continuing series of additive manufacturing benchmark measurements, challenge problems, and conferences with the primary goal enabling modelers to test their simulations against rigorous, highly controlled measurement data. To this end, single-track (1D) pad (2D) scans on bare plate nickel alloy 718 were completed thermography, cross-sectional grain orientation local chemical composition maps,...
An in-depth understanding of the texture formation in melt pools allows for modification surface layer microstructure and corresponding material properties, providing an opportunity to integrate laser re-melting into metal additive manufacturing. This study investigates crystallographic at different cooling rates single melting tracks on Inconel 718 (IN718) plate produced by re-melting. The rate varies from 2.31 × 105 °C/s 9.56 with increase scanning 400 mm/s 1200 mm/s, measured recently...
Abstract We discuss and demonstrate the application of recently developed spherical nanoindentation stress-strain protocols in characterizing mechanical behavior tungsten polycrystalline samples with ion-irradiated surfaces. It is demonstrated that a simple variation indenter size (radius) can provide valuable insights into heterogeneous characteristics radiation-induced-damage zone. have also studied effect irradiation for different grain orientations same sample.
The network of resonant bar detectors gravitational waves resumed coordinated observations within the International Gravitational Event Collaboration (IGEC-2). Four are taking part in this Collaboration: ALLEGRO, AURIGA, EXPLORER and NAUTILUS. We present here results search for wave bursts over 6 months during 2005, when IGEC-2 was only observatory operation. implemented data analysis is based on a time coincidence among NAUTILUS; ALLEGRO reserved follow-up studies. amplitude sensitivity to...