@article {2021, title = {Experimental investigation and thermodynamic modelling of the Mg{\textendash}Al-rich region of the Mg{\textendash}Al{\textendash}Sr System}, journal = {International Journal of Materials Research}, volume = {97}, year = {2022}, month = {01}, pages = {422-428}, doi = {10.1515/ijmr-2006-0070}, author = {Cao, Hongbo and Zhu, Jun and Zhang, Chuan and Wu, Kaisheng and Saddock, Nicholas and Jones, J. and Pollock, Tresa and Schmid-Fetzer, Rainer and Chang, Y.} } @article {1686, title = {Electron backscattered diffraction using a new monolithic direct detector: High resolution and fast acquisition}, journal = {Ultramicroscopy}, volume = {220}, year = {2021}, pages = {113160}, abstract = {

A monolithic active pixel sensor based direct detector that is optimized for the primary beam energies in scanning electron microscopes is implemented for electron back-scattered diffraction (EBSD) applications. The high detection efficiency of the detector and its large array of pixels allow sensitive and accurate detection of Kikuchi bands arising from primary electron beam excitation energies of 4 keV to 28 keV, with the optimal contrast occurring in the range of 8\–16 keV. The diffraction pattern acquisition speed is substantially improved via a sparse sampling mode, resulting from the acquisition of a reduced number of pixels on the detector. Standard inpainting algorithms are implemented to effectively estimate the information in the skipped regions in the acquired diffraction pattern. For EBSD mapping, an acquisition speed as high as 5988 scan points per second is demonstrated, with a tolerable fraction of indexed points and accuracy. The collective capabilities spanning from high angular resolution EBSD patterns to high speed pattern acquisition are achieved on the same detector, facilitating simultaneous detection modalities that enable a multitude of advanced EBSD applications, including lattice strain mapping, structural refinement, low-dose characterization, 3D-EBSD and dynamic in situ EBSD.

}, keywords = {Direct detection, EBSD, Indexing, Inpainting, SEM, Sparse sampling}, issn = {18792723}, doi = {10.1016/j.ultramic.2020.113160}, url = {https://doi.org/10.1016/j.ultramic.2020.113160}, author = {Wang, Fulin and Echlin, Mclean P. and Taylor, Aidan A. and Shin, Jungho and Bammes, Benjamin and Levin, Barnaby D.A. and De Graef, Marc and Pollock, Tresa M. and Gianola, Daniel S.} } @article {1651, title = {Expanded dataset of mechanical properties and observed phases of multi-principal element alloys}, journal = {Scientific Data}, volume = {7}, year = {2020}, pages = {1{\textendash}6}, abstract = {

This data article presents a compilation of mechanical properties of 630 multi-principal element alloys\ (MPEAs). Built upon recently published MPEA databases, this article includes updated records from previous reviews (with minor error corrections) along with new data from articles that were published since 2019. The extracted properties include reported composition, processing method, microstructure, density, hardness, yield strength, ultimate tensile strength (or maximum compression strength), elongation (or maximum compression strain), and Young\&$\#$39;s modulus. Additionally, descriptors (e.g. grain size) not included in previous reviews were also extracted for articles that reported them. The database is hosted and continually updated on an open data platform, Citrination. To promote interpretation, some data are graphically presented.

}, issn = {20524463}, doi = {10.1038/s41597-020-00768-9}, author = {Borg, Christopher K.H. and Frey, Carolina and Moh, Jasper and Pollock, Tresa M. and Gorsse, St{\'e}phane and Miracle, Daniel B. and Senkov, Oleg N. and Meredig, Bryce and Saal, James E.} } @article {1371, title = {The evolving landscape for alloy design}, journal = {MRS Bulletin}, volume = {44}, year = {2019}, pages = {238{\textendash}246}, abstract = {

The discovery, design, and development of new alloys have long been critical elements of advanced engineering systems. Challenged by their chemical and structural complexity, this design process is, however, often too slow. This article highlights progress in theory, computation, data, and advanced experimental techniques that are advancing our capabilities for rapid discovery and design of new multicomponent alloys. Applied across the length scales, these new capabilities support exploration across broad composition spaces; examples of new materials and associated advances in the understanding of underlying thermochemical and thermomechanical phenomena are presented. We highlight current challenges, gaps, and specific areas that, if further developed, could have future high payoff.

}, keywords = {alloys, crystallographic structure, electronic structure, phase equilibria, simulation}, issn = {08837694}, doi = {10.1557/mrs.2019.69}, author = {Pollock, Tresa M. and Van der Ven, Anton} } @article {1311, title = {Elastic Properties of Novel Co- and CoNi-Based Superalloys Determined through Bayesian Inference and Resonant Ultrasound Spectroscopy}, journal = {Metallurgical and Materials Transactions A}, volume = {49A}, year = {2018}, month = {06/2018}, pages = {2324{\textendash}2339}, issn = {1543-1940}, doi = {10.1007/s11661-018-4575-6}, url = {https://doi.org/10.1007/s11661-018-4575-6}, author = {Goodlet, Brent R and Mills, Leah and Bales, Ben and Charpagne, Marie-agathe and Murray, Sean P and Lenthe, William C and Petzold, Linda and Pollock, Tresa M} } @article {1421, title = {Enhancing thermoelectric properties through control of Nickel Interstitials and phase separation in Heusler/Half-Heusler TiNi1.1Sn composites}, journal = {Materials}, volume = {11}, year = {2018}, pages = {1{\textendash}12}, abstract = {

Thermoelectric devices, which allow direct conversion of heat into electrical energy, require materials with improved figures of merit (zT) in order to ensure widespread adoption. Several techniques have been proposed to increase the zT of known thermoelectric materials through the reduction of thermal conductivity, including heavy atom substitution, grain size reduction and inclusion of a semicoherent second phase. The goal in these approaches is to reduce thermal conductivity through phonon scattering without modifying the electronic properties. In this work, we demonstrate that Ni interstitials in the half-Heusler thermoelectric TiNiSn can be created and controlled in order to improve physical properties. Ni interstitials in TiNi1.1Sn are not thermodynamically stable and, instead, are kinetically trapped using appropriate heat treatments. The Ni interstitials, which act as point defect phonon scattering centers and modify the electronic states near the Fermi level, result in reduced thermal conductivity and enhance the Seebeck coefficient. The best materials tested here, created from controlled heat treatments of TiNi1.1Sn samples, display zT = 0.26 at 300 K, the largest value reported for compounds in the Ti-Ni-Sn family.

}, keywords = {Heusler, Phonon scattering, Point defect, Thermoelectric, TiNi2Sn, TiNiSn}, issn = {19961944}, doi = {10.3390/ma11060903}, author = {Levin, Emily E. and Long, Francesca and Douglas, Jason E. and Buffon, Malinda L.C. and Lamontagne, Leo K. and Pollock, Tresa M. and Seshadri, Ram} } @article {1446, title = {Electrically pumped continuous wave quantum dot lasers epitaxially grown on patterned, on-Axis (001) Si}, journal = {Optics Express}, volume = {25}, year = {2017}, pages = {3927{\textendash}3934}, keywords = {III-V on Silicon, Monolithic Integration, Quantum dot lasers, Silicon Photonics}, isbn = {9784885523069}, issn = {08999406}, doi = {10.1364/ol.42.000338}, author = {Norman, Justin and Kennedy, M.J. and Selvidge, Jennifer and Li, Quang and Wan, Yating and Liu, Alan Y. and Callahan, Patrick G. and Echlin, Mclean P. and Pollock, Tresa M. and Lau, Kei May and Gossard, Arthur C. and Bowers, John E.} } @article {buffon2016enhancement, title = {Enhancement of thermoelectric properties in the Nb{\textendash}Co{\textendash}Sn half-Heusler/Heusler system through spontaneous inclusion of a coherent second phase}, journal = {Journal of Applied Physics}, volume = {120}, number = {7}, year = {2016}, pages = {075104}, publisher = {AIP Publishing}, author = {Buffon, Malinda LC and Laurita, Geneva and Verma, Nisha and Lamontagne, Leo and Ghadbeigi, Leila and Lloyd, Demetrious L and Sparks, Taylor D and Pollock, Tresa M and Seshadri, Ram} } @article {pebley2016exchange, title = {Exchange bias and spin glass behavior in biphasic NiFe 2 O 4/NiO thin films}, journal = {Journal of Magnetism and Magnetic Materials}, year = {2016}, publisher = {North-Holland}, author = {Pebley, Andrew C and Fuks, Preston E and Pollock, Tresa M and Gordon, Michael J} } @article {nizolek2015enhanced, title = {Enhanced plasticity via kinking in cubic metallic nanolaminates}, journal = {Advanced Engineering Materials}, volume = {17}, number = {6}, year = {2015}, pages = {781{\textendash}785}, author = {Nizolek, Thomas and Mara, Nathan A and Beyerlein, Irene J and Avallone, Jaclyn T and Pollock, Tresa M} } @article {berman2014effect, title = {Effect of Microstructure on Deformation and Fracture of Thixomolded and Thermomechanically Processed AZ61}, journal = {Magnesium Technology 2014}, year = {2014}, pages = {161{\textendash}166}, publisher = {John Wiley \& Sons, Inc.}, author = {Berman, TD and Donlon, W and Decker, R and Pollock, TM and Jones, JW} } @article {miller2014effect, title = {The effect of processing conditions on heat transfer during directional solidification via the Bridgman and liquid metal cooling processes}, journal = {Metallurgical and materials transactions A}, volume = {45}, number = {1}, year = {2014}, pages = {411{\textendash}425}, publisher = {Springer US}, author = {Miller, Jonathan D and Pollock, Tresa M} } @article {adharapurapu2014effective, title = {Effective Hf-Pd Co-doped $\beta$-NiAl (Cr) coatings for single-crystal superalloys}, journal = {Acta Materialia}, volume = {76}, year = {2014}, pages = {449{\textendash}462}, publisher = {Pergamon}, author = {Adharapurapu, Raghavendra R and Zhu, Jun and Dheeradhada, Voramon S and Lipkin, Don M and Pollock, Tresa M} } @article {handwerker2014emerging, title = {Emerging science and research opportunities for metals and metallic nanostructures}, journal = {Jom}, volume = {66}, number = {7}, year = {2014}, pages = {1321{\textendash}1341}, publisher = {Springer US}, author = {Handwerker, Carol A and Pollock, Tresa M} } @article {iyer2014energetics, title = {Energetics and nucleation of point defects in aluminum under extreme tensile hydrostatic stresses}, journal = {Physical Review B}, volume = {89}, number = {1}, year = {2014}, pages = {014108}, publisher = {American Physical Society}, author = {Iyer, Mrinal and Gavini, Vikram and Pollock, Tresa M} } @article {zhu2014experimental, title = {Experimental investigation and thermodynamic modeling of the Co-rich region in the Co-Al-Ni-W quaternary system}, journal = {Journal of Phase Equilibria and Diffusion}, volume = {35}, number = {5}, year = {2014}, pages = {595{\textendash}611}, publisher = {Springer US}, author = {Zhu, J and Titus, MS and Pollock, TM} } @article {echlin2013ebsd, title = {EBSD Imaging of Femtosecond Laser Ablated Surfaces Using the TriBeam System}, journal = {Microscopy and Microanalysis}, volume = {19}, number = {S2}, year = {2013}, pages = {864{\textendash}865}, publisher = {Cambridge Univ Press}, author = {Echlin, MP and Titus, M and Kraemer, S and Pollock, T} } @article {godlewski2013effect, title = {The effect of aging on the relaxation of residual stress in cast aluminum}, journal = {Metallurgical and Materials Transactions A}, volume = {44}, number = {10}, year = {2013}, pages = {4809{\textendash}4818}, publisher = {Springer US}, author = {Godlewski, Larry A and Su, Xuming and Pollock, Tresa M and Allison, John E} } @article {douglas2012enhanced, title = {Enhanced thermoelectric properties of bulk TiNiSn via formation of a TiNi2Sn second phase}, journal = {Applied Physics Letters}, volume = {101}, number = {18}, year = {2012}, pages = {183902}, publisher = {AIP Publishing}, author = {Douglas, Jason E and Birkel, Christina S and Miao, Mao-Sheng and Torbet, Chris J and Stucky, Galen D and Pollock, Tresa M and Seshadri, Ram} } @conference {terbush2010elemental, title = {Elemental partitioning and microstructure of Mg-Al-Ca-Sn quaternary alloys}, booktitle = {TMS 2010: Aluminium and Magnesium (TMS 14 February 2010 to 18 February 2010)}, year = {2010}, pages = {1{\textendash}5}, publisher = {TMS}, organization = {TMS}, author = {TerBush, Jessica and Chen, Olivia and Jones, J and Pollock, Tresa} } @article {van2010elemental, title = {Elemental partitioning of platinum group metal containing Ni-base superalloys using electron microprobe analysis and atom probe tomography}, journal = {Acta Materialia}, volume = {58}, number = {6}, year = {2010}, pages = {1952{\textendash}1962}, publisher = {Pergamon}, author = {Van Sluytman, JS and La Fontaine, A and Cairney, JM and Pollock, TM} } @article {suzuki2007effect, title = {Effect of Sr additions on the microstructure and strength of a Mg-Al-Ca ternary alloy}, journal = {Metallurgical and Materials Transactions A}, volume = {38}, number = {2}, year = {2007}, pages = {420{\textendash}427}, publisher = {Springer US}, author = {Suzuki, Akane and Saddock, ND and Riester, L and Lara-Curzio, E and Jones, JW and Pollock, TM} } @article {carroll2007elemental, title = {Elemental partitioning in Ru-containing nickel-base single crystal superalloys}, journal = {Materials Science and Engineering: A}, volume = {457}, number = {1}, year = {2007}, pages = {292{\textendash}299}, publisher = {Elsevier}, author = {Carroll, LJ and Feng, Q and Mansfield, JF and Pollock, TM} } @article {tryon2006experimental, title = {Experimental assessment of the Ru{\textendash}Al{\textendash}Ni ternary phase diagram at 1000 and 1100{\textdegree} C}, journal = {Materials Science and Engineering: A}, volume = {430}, number = {1}, year = {2006}, pages = {266{\textendash}276}, publisher = {Elsevier}, author = {Tryon, B and Pollock, TM} } @article {cao2006experimental, title = {Experimental investigation and thermodynamic modelling of the Mg{\textendash}Al-rich region of the Mg{\textendash}Al{\textendash}Sr System}, journal = {Zeitschrift f{\"u}r Metallkunde}, volume = {97}, number = {4}, year = {2006}, pages = {422{\textendash}428}, publisher = {Carl Hanser Verlag}, author = {Cao, Hongbo and Zhu, Jun and Zhang, Chuan and Wu, Kaisheng and Saddock, Nicholas D and Jones, J Wayne and Pollock, Tresa M and Schmid-Fetzer, Rainer and Chang, Y Austin} } @article {xiao2004effect, title = {Effect of Boron Concentration on Fatigue Crack Propagation Resistance and Low Cycle Fatigue Properties of Inconel 718, Superalloys 2004, KA Green, H}, journal = {Harada, TE Howson, TM Pollock, RC Reed, JJ Schirra, and S. Walston, Ed., TMS, Warrendale, PA}, year = {2004}, pages = {275{\textendash}281}, author = {Xiao, L and Chen, DL and Chaturvedi, MC} } @article {nandy2003elevated, title = {Elevated temperature deformation and dynamic strain aging in polycrystalline RuAl alloys}, journal = {Intermetallics}, volume = {11}, number = {10}, year = {2003}, pages = {1029{\textendash}1038}, publisher = {Elsevier}, author = {Nandy, TK and Feng, Q and Pollock, TM} } @article {li2001effect, title = {On the effect of low and high pressure hydrogen charging on the oxidation of a Ti{\textendash}48Al{\textendash}2Cr{\textendash}2Nb alloy}, journal = {Materials Science and Engineering: A}, volume = {318}, number = {1}, year = {2001}, pages = {224{\textendash}234}, publisher = {Elsevier}, author = {Li, K and Pollock, TM and De Graef, M and Habel, U and Thompson, AW} } @article {shi1999evolution, title = {Evolution of substructures in deformed NiAl single crystals oriented for single slip}, journal = {Philosophical Magazine A}, volume = {79}, number = {7}, year = {1999}, pages = {1555{\textendash}1566}, publisher = {Taylor \& Francis}, author = {Shi, Xiaoli and Mahajan, S and Pollock, TM and Arunachalam, VS} } @article {paris1997early, title = {Early stages of precipitate rafting in a single crystal Ni Al Mo model alloy investigated by small-angle X-ray scattering and TEM}, journal = {Acta materialia}, volume = {45}, number = {3}, year = {1997}, pages = {1085{\textendash}1097}, publisher = {Pergamon}, author = {Paris, O and Fa, M and Fa, E and Pollock, TM and Fratzl, P and others} } @article {fahrmann1997element, title = {Element partitioning during coarsening of ($\gamma$- $\gamma$') Ni-Al-Mo alloys}, journal = {Metallurgical and Materials Transactions A}, volume = {28}, number = {9}, year = {1997}, pages = {1943{\textendash}1945}, publisher = {Springer}, author = {F{\"a}hrmann, M and F{\"a}hrmann, E and Pollock, TM and Johnson, WC} } @article {faehrmann1997element, title = {Element partitioning during coarsening of ($\{$gamma$\}$$\{$minus$\}$$\{$gamma$\}$$\{$prime$\}$) Ni-Al-Mo alloys}, journal = {Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science}, volume = {28}, number = {9}, year = {1997}, author = {Faehrmann, M and Faehrmann, E and Pollock, TM and Johnson, WC} } @article {dary1996effects, title = {Effects of environment on the tensile and creep behavior of a low-oxygen orthorhombic-based titanium aluminide, Ti-22 Al-23 Nb}, journal = {Titanium{\textquoteright}95- Science and technology}, year = {1996}, pages = {396{\textendash}403}, author = {Dary, Francois-Charles and Woodard, Shiela A and Pollock, Tresa M} } @article {dary1996effects, title = {Effects of high temperature air and vacuum exposures on the room temperature tensile behavior of the (O+ B2) titanium aluminide Ti-22Al-23Nb}, journal = {Materials Science and Engineering: A}, volume = {208}, number = {2}, year = {1996}, pages = {188{\textendash}202}, publisher = {Elsevier}, author = {Dary, Francois-Charles and Pollock, Tresa M} } @article {fahrmann1996experimental, title = {An experimental study of the role of plasticity in the rafting kinetics of a single crystal Ni-base superalloy}, year = {1996}, author = {F{\"a}hrmann, M and F{\"a}hrmann, E and Paris, O and Fratzl, P and Pollock, TM} } @article {kitano1994effect, title = {The effect of impurity content on thermally activated deformation in NiAl single crystals}, journal = {Scripta metallurgica et materialia}, volume = {31}, number = {4}, year = {1994}, pages = {397{\textendash}402}, publisher = {Pergamon}, author = {Kitano, K and Pollock, TM and Noebe, RD} }