A5074087036- Additive Manufacturing Materials and Processes
- High Entropy Alloys Studies
- High Temperature Alloys and Creep
- Advanced Materials Characterization Techniques
- Additive Manufacturing and 3D Printing Technologies
- Welding Techniques and Residual Stresses
- Thermography and Photoacoustic Techniques
- 3D Printing in Biomedical Research
- Crystallization and Solubility Studies
- nanoparticles nucleation surface interactions
- Intermetallics and Advanced Alloy Properties
- Innovative Microfluidic and Catalytic Techniques Innovation
- Advanced materials and composites
- Advanced Sensor and Energy Harvesting Materials
- Microstructure and mechanical properties
- Machine Learning in Materials Science
- Solidification and crystal growth phenomena
University of California, Santa Barbara
2020-2024
Carnegie Mellon University
2016-2018
Polydimethylsiloxane (PDMS) elastomer is used in a wide range of biomaterial applications including microfluidics, cell culture substrates, flexible electronics, and medical devices. However, it has proved challenging to 3D print PDMS complex structures due its low elastic modulus need for support during the printing process. Here we demonstrate hydrophobic prepolymer resins within hydrophilic Carbopol gel via freeform reversible embedding (FRE). In FRE process, acts as Bingham plastic that...
Abstract Additive manufacturing promises a major transformation of the production high economic value metallic materials, enabling innovative, geometrically complex designs with minimal material waste. The overarching challenge is to design alloys that are compatible unique additive processing conditions while maintaining properties sufficient for challenging environments encountered in energy, space, and nuclear applications. Here we describe class strength, defect-resistant 3D printable...
Syringe pump extruders are required for a wide range of 3D printing applications, including bioprinting, embedded printing, and food printing. However, the mass syringe becomes major challenge most platforms, requiring compromises in speed, resolution and/or volume. To address these issues, we have designed large volume extruder (LVE) that is compatible with low-cost, open source printers, herein demonstrate its performance on PrintrBot Simple Metal. Key aspects LVE include: (1) it hardware...
Understanding rapid solidification behavior at velocities relevant to additive manufacturing (AM) is critical controlling microstructure selection. Although in-situ visualization of dynamics now possible, systematic studies under AM conditions with microstructural outcomes compared theory remain lacking. Here we measure solid-liquid interface Ni-Mo-Al alloy single crystals synchrotron X-ray imaging, characterize the microstructures, and show discrepancies classical theories regarding onset...
Boron is commonly added to superalloys in small amounts enhance creep resistance, but can lead cracking at high concentrations, especially during the additive manufacturing process. Two variants of CoNi-based GammaPrint®-700 superalloy with different B contents (0.08 at.% vs 0.16 at.%) were printed via laser powder bed fusion (LPBF) same printing parameters, only alloy exhibiting solidification cracking. Atom probe tomography (APT) revealed stronger segregation behaviors compared low both...
Journal Article 3D Characterization of a Novel CoNi-superalloy for Additive Manufacturing Get access Andrew Polonsky, Polonsky University California-Santa Barbara, Santa California, United States Search other works by this author on: Oxford Academic Google Scholar Toby Francis, Francis Kira Pusch, Pusch McLean Echlin, Echlin Aurelien Botman, Botman Thermo Fisher Scientific, Hillsboro, Oregon, Steven Randolph, Randolph Remco Geurts, Geurts Eindhoven, Noord-Brabant, Netherlands Jorge Filevich,...
Journal Article Merging Machine Learning and TriBeam Tomography for 3D Defect Detection in an AM CoNi-Based Superalloy Get access James Lamb, Lamb University of California Santa Barbara, Materials Department, CA, United States Corresponding author: jlamb@ucsb.edu Search other works by this author on: Oxford Academic Google Scholar McLean Echlin, Echlin Andrew Polonsky, Polonsky Sandia National Laboratories, Mechanics & Tribology, Albuquerque, NM, Remco Geurts, Geurts Thermo Fisher...