Prof. Trelewicz presents one invited and one contributed talk at the 2016 MRS Conference
in Boston, MA.
November 28, 2016
Jason’s invited talk described EMNL’s work on mechanics driven design of crystalline
amorphous nanolaminates. The contributed talk highlighted work with Tim Rupert’s group
at UC Irvine on achieving nanocrystalline metals with extreme strength through grain
boundary doping.
Bin’s paper on “Mechanistic Coupling of Dislocation and STZ Plasticity in Crystalline
Amorphous Nanolaminates” is published in Acta Materialia.
September 1, 2016
This paper explores the deformation behavior of crystalline-amorphous nanolaminates
through molecular dynamics simulations using nanolaminate models that contain columnar
nanograins in the crystalline layers to more closely resemble experimentally accessible
nanolaminate structures. Quantitative analysis of the plastic strain distribution
among competing mechanisms and their coupling at the nanoscale is accomplished through
the implementation of continuum deformation metrics.
Olivia’s paper on “Microstructure and Corrosion Resistance of Laser Additively Manufactured
316L Stainless Steel” is published in the March 2016 issue of JOM on Additive Manufacturing.
July 4, 2016
This paper describes our research on microstructural evolution during the devitrification
of amorphous tantalum thin films synthesized via pulsed laser deposition. The phases
formed during crystallization and their stability were characterized as a function
of the chamber pressure during deposition, devitrification temperature, and annealing
time. A range of metastable nanocrystalline tantalum oxides were identified following
devitrification including multiple orthorhombic oxide phases, which often were present
with, or evolved to, the tetragonal TaO2 phase. New insights were gained into the transformation sequence and stability of
these nanocrystalline phases, which presents opportunities for the development of
advanced tantalum oxide‐based dielectric materials for novel memristor designs..
Prof. Trelewicz appointed to the Metallurgical and Materials Transactions A Board
of Review.
April 17, 2016
Metallurgical and Materials Transactions A focuses on the latest research in all aspects
of physical metallurgy and materials science. It explores relationships among processing,
structure, and properties of materials; publishes critically reviewed, original research
of archival significance. Each member of the Board of Review is called a “Key Reader”,
and it is the responsibility of the Key Reader to provide the editors with a concise
and unambiguous evaluation of the merits of a manuscript and with an equally unambiguous
recommendation of the action to be taken.
EMNL’s research featured in the Times Beacon Record
April 05, 2016
EMNL’s research on the design of new interface engineered metallic glasses was featured
in the science column “The Power of 3” in the Times Beacon Record. Prof. Trelewicz
is pictured along with Ph.D. students Olivia Donaldson and Jonathan Gentile in front
of the new SEM/FIB at Stony Brook University’s Advanced Energy Center. Further information
can be found HERE.
Prof. Trelewicz presents invited talk at RPI
April 5, 2016
Jason’s talk on “Stress-assisted Grain Growth in Nanocrystalline Metals Inhibited
by Grain Boundary Segregation” described our work on understanding the mechanisms
underpinning mechanical grain growth in nanocrystalline metals and the role of segregated
solute in suppressing nanostructure evolution.
Prof. Trelewicz receives NSF CAREER Award on “Interface Engineered Amorphous Alloys
for Thermoplastic Forming of Ductile Bulk Metallic Glasses”
March 14, 2016
This CAREER award supports fundamental research to understand the mechanisms underpinning
strain delocalization in interface engineered amorphous alloys containing intergranular
regions of excess free volume. The research team will perform molecular dynamics simulations
of shear localization collectively with advanced characterization and nanomechanical
testing of interface engineered amorphous alloys to elucidate the role of interfacial
structure and amorphous grain size in the mechanics of strain delocalization. Innovations
in additive spray manufacturing will be devised to enable transformational microstructures
that effectively delocalize the accumulation of plastic strain via distributed microplasticity.
Further information can be found HERE.
Prof. Trelewicz’s materials engineering course for non-engineering majors, “Materials
of the Modern World”, featured by ASEE.
March 11, 2016
Joining the ranks of such universities as Princeton, Wesleyan, and University of Maryland,
a case study of Stony Brook University’s (SBU)’s innovative engineering education
courses appeared in a collection of similar innovations showcased by ASEE as one of
14 exemplary programs. The case study, written by Sheila Tobias, a nationally-known
figure in science and mathematics reform, focused on TECH and Science, Technology,
and Society (STAS) courses offered by the College of Engineering and Applied Sciences
(CEAS) that are geared toward non-majors. Further information can be found HERE.
Olivia’s paper on “Microstructure and Corrosion Resistance of Laser Additively Manufactured
316L Stainless Steel” is published in the March 2016 issue of JOM on Additive Manufacturing.
February 28, 2016
This paper describes our work in collaboration with Prof. Gary Halada (SBU) and Prof.
Guha Manogharan (Youngstown State University) on the formation of micro and nanoscale
structures in 316L stainless steel samples printed by laser additive manufacturing.
A variety of techniques including x-ray diffraction, optical, scanning and transmission
electron microscopy, x-ray fluorescence, and energy dispersive x-ray spectroscopy
were employed to characterize the microstructure and chemistry of these materials,
which revealed that multiscale segregation of segregation of Mo contributed to a reduction
in the corrosion resistance relative to wrought 316L stainless steel.
Prof. Trelewicz presents one invited and two contributed talks at the 2016 TMS Annual
Meeting in Nashville, TN.
February 15, 2016
Jason’s invited talk highlighted EMNL’s work on the mechanisms of stress-assisted
grain growth in nanocrystalline metals and the effect of segregated solute on suppressing
microstructural evolution. The contributed talks focused on the coupling of dislocation
and shear transformation zone plasticity in crystalline-amorphous nanolaminates, and
in situ electron microscopy analysis of microstructural evolution in amorphous and nanocrystalline
Ta thin films.
EMNL receives funding from Pacific Northwest National Laboratory for “Thermodynamic
Modeling of Nanostructure Stability in Al, Mg, and Fe Alloys”
February 1, 2016
This research is a two-year collaborative project with PNNL with a focus on implementing
thermodynamic models for nanostructure stability to design alloy compositions with
the potential to form nanostructures stable against microstructural evolution and
phase segregation.
Prof. Trelewicz presents a keynote talk at the International Symposium on Plasticity
in Kona, HI.
January 5, 2016
Jason’s talk on “The Synergistic Role of Grain Boundaries and Amorphous-Crystalline
Interfaces in the Deformation of Metallic Nanolaminates” discussed our work on the
role of grain boundaries in biasing the onset of plasticity and nanovoid formation
in crystalline-amorphous nanolaminates.