A5087079854- Shape Memory Alloy Transformations
- Microstructure and mechanical properties
- Phase-change materials and chalcogenides
- Chalcogenide Semiconductor Thin Films
- Titanium Alloys Microstructure and Properties
- Magnetic and transport properties of perovskites and related materials
- Microstructure and Mechanical Properties of Steels
- Force Microscopy Techniques and Applications
- Ultrasonics and Acoustic Wave Propagation
- MXene and MAX Phase Materials
- Advanced Materials Characterization Techniques
- Mechanical stress and fatigue analysis
- Orthopaedic implants and arthroplasty
- Advanced Electron Microscopy Techniques and Applications
- Machine Learning in Materials Science
- Solidification and crystal growth phenomena
- Micro and Nano Robotics
- Software Engineering Research
- Pickering emulsions and particle stabilization
- Advanced Chemical Physics Studies
- High Entropy Alloys Studies
- Safety Systems Engineering in Autonomy
- Advanced Materials and Mechanics
- Metal and Thin Film Mechanics
- Hydrogen embrittlement and corrosion behaviors in metals
Exponent (United States)
2021-2024
Menlo School
2021-2024
Massachusetts Institute of Technology
2020-2023
Columbia University
2019-2020
The Ohio State University
2012-2017
Lawrence Berkeley National Laboratory
2015-2016
Molecular Foundry
2015-2016
This paper introduces corpus-guided top-down synthesis as a mechanism for synthesizing library functions that capture common functionality from corpus of programs in domain specific language (DSL). The algorithm builds abstractions directly initial DSL primitives, using syntactic pattern matching intermediate to intelligently prune the search space and guide towards maximally shared structures corpus. We present an implementation approach tool called Stitch evaluate it against...
Using extended time series scanning transmission electron microscopy, we investigate structural fluctuations at an incommensurate grain boundary in Au. Atomic-resolution imaging reveals the coalescence of two interfacial steps, or disconnections, different height via coordinated motion atoms along close-packed directions. Numerical simulations uncover a transition pathway that involves constriction and expansion characteristic stacking fault often associated with boundaries face-centered...
Colloids that interact via a short-range attraction serve as the primary building blocks for broad range of self-assembled materials. However, one well-known drawbacks to this strategy is these rapidly and readily condense into metastable colloidal gel. Using computer simulations, we illustrate how addition small fraction purely repulsive self-propelled colloids, technique referred active doping, can prevent formation gel state drive system toward its thermodynamically favored crystalline...
The development of colloidal particles that can become self-propelled when exposed to a source light given frequency represents one the most exciting new developments in field active matter. In this paper, we perform numerical simulations explore several properties crystalline aggregates presence such external fields. We show how permanent gaps tunable size be carved into these crystals as result solid-gas transition occurs above threshold intensity. compare phenomenon occurring parent...
Abstract The present study evaluates the fatigue and fracture performance of electropolished Nitinol wire apex specimens subjected to a range initial bending crimp/pre-strains determine how behavior may be modified by compressive strains residual stress. Three extrados (tensile) crimp/pre-strain conditions (8, 12, 14.5%) were investigated. Specimens cycled in unidirectional up 10 7 cycles at 37 °C 1.5% mean strain. High observed decrease probability for higher strain amplitudes cycles. Bend...
Synthesizing programs from examples requires searching over a vast, combinatorial space of possible programs. In this search process, key challenge is representing the behavior partially written program before it can be executed, to judge if on right track and predict where next. We introduce general technique for in synthesis engine. take inspiration abstract interpretation, which an approximate execution model used determine unfinished will eventually satisfy goal specification. Here we...
Journal Article High Resolution Electron Microscopy of Grain Boundary Motion During Island Shrinkage Get access U Dahmen, Dahmen National Center for Microscopy, Molecular Foundry, LBNL, Berkeley, CA 94720, USA Search other works by this author on: Oxford Academic Google Scholar T Radetic, Radetic USAFaculty Technology and Metallurgy, University Belgrade, Serbia ML Bowers, Bowers C Ophus, Ophus A Gautam, Gautam F Lançon Laboratoire de Simulation Atomistique (L_Sim), SP2M, INAC, CEA, 38054...
Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.
The national initiative on Integrated Computational Materials Engineering holds great promise for accelerating the insertion of new materials in high performance structural applications.Achieving this aim relies upon fidelity models and their ability to capture connectivity between processing, microstructure performance.Advancements our characterize deformation mechanisms at finer length-scales are providing insights into governing several important being developed This work will focus...
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