Schuh Group

Shape Memory Materials

S.M. Ueland, et al., Acta Materialia, 61, 5618-5625, 2013.
Shape memory materials exhibit pseudo-elastic behaviors and shape memory properties. They can be deformed 'elastically' up to 7-8% or even higher strain which will completely recover upon unloading. A lot of energy is dissipated in one pseudo-elastic loading/unloading cycle, making shape memory materials excellent candidates for mechanical damping applications. What is more, the coupling between thermal and mechanical fields enables these materials to be used as actuators or components in multifunctional composites and devices. Our group is investigating the pseudo-elastic and shape memory properties of shape memory alloys and ceramics. We study the size effects of the damping capabilities and shape memory properties.

Selected Publications:
Microstructure, crystallization and shape memory behavior of titania and yttria co-doped zirconia, X.M. Zeng, Z. Du, C.A. Schuh, N. Tamura, C.L Gan, Journal of the European Ceramic Society, 37, 2016.

Melt-cast microfibers of Cu-based shape memory alloy adopt a favorable texture for superelasticity, N. Tuncer, C.A. Schuh, Scripta Materialia, 117, 46-50, 2016.

A coupled kinetic Monte Carlo finite element mesoscale model for thermoelastic martensitic phase transformations in shape memory alloys, Y. Chen, C.A. Schuh, Acta Materialia, 83, 431-447, 2015.

Size effects and shape memory properties of ZrO2 ceramic micro- and nano-pillars, Z. Du, X.M. Zeng, Q. Liu, A. Lai, S. Amini, A. Miserez, C.A. Schuh, C.L. Gan, Scripta Materialia, 101, 40-43, 2015.

Thermally induced martensitic transformations in Cu-based shape memory alloy microwires, N. Tuncer, L. Quiao, R. Radovitzky, C.A. Schuh, Journal of Materials Science, 50, 7473-7487, 2015.

Surface roughness-controlled superelastic hysteresis in shape memory microwires, S.M. Ueland, C.A. Schuh, Scripta Materialia, 82, 1-4, 2014.

Transition from many domain to single domain martensite morphology in small-scale shape memory alloys , S.M. Ueland, C.A. Schuh, Acta Materialia, 61, 5618-5625, 2013.

Shape Memory and Superelastic Ceramics at Small Scales, A. Lai, Z. Du, C.L. Gan, C.A. Schuh, Science, 341, 1505-1508, 2013.

Grain boundary and triple junction constraints during martensitic transformation in shape memory alloys, S.M. Ueland, C.A. Schuh, Journal of Applied Physics, 114, 053503, 2013.

Superplastic deformation induced by cyclic hydrogen charging, H. Choe, C.A. Schuh, D.C. Dunand, Journal of Applied Physics, 103, 103518, 2008.

Hardening of a metallic glass during cyclic loading in the elastic range, C.E. Packard, L.M. Witmer, C.A. Schuh, Applied Physics Letters, 92, 171911, 2008.

Superelasticity and shape memory in micro- and nanometer-scale pillars, J.M. San Juan, M.L. No, C.A. Schuh, Advanced Materials, 20, 272-278, 2008.

Materials Processing Engineering

D. Rodney, et al., Physical Review Letters, 102, 235503, 2009.
We experimentally and computationally investigate the use of different materials processing techniques including ball-milling and electrodeposition to achieve target microstructures such as metallic glasses, stable-nanocrystalline alloys, and grain boundary engineered materials.

Selected Publications:
Mesostructure optimization in multi-material additive manufacturing: a theoretical perspective, Z.Y. Hang, S.R. Cross, C.A. Schuh, Journal of Materials Science, 52, 4288-4298, 2017.

Stability criteria for nanocrystalline alloys, A.R. Kalidindi, C.A. Schuh, Acta Materialia, 132, 128-137, 2017.

Modeling localized corrosion with an effective medium approximation, S.R. Cross, C.A. Schuh, Corrosion Science, 116, 53-65, 2017.

Superelasticity in micro-scale shape memory ceramic particles, Z. Du, X.M. Zeng, Q. Liu, C.A. Schuh, C.L. Gan, Acta Materialia, 123, 255-263, 2017.

Fast finite element calculation of effective conductivity of random continuum microstructures: The recursive Poincare-Steklov operator method, T.J. Hardin, C.A. Schuh, Journal of Computational Physics, 342, 1-12, 2017.

Shape memory zirconia foams through ice templating, X. Zhao, A. Lai, C.A. Schuh, Journal of Computational Physics, 135, 50-53, 2017.

Spontaneous solid-state foaming of nanocrystalline thermoelectric compounds at elevated temperatures, S.A. Humphry-Baker, C.A. Schuh, Journal of Computational Physics, 36, 223-232, 2017.

Granular shape memory ceramic packings, Z.Y. Hang, M. Hassani-Gangaraj, Z. Du, C. L. Gan, C.A. Schuh, Acta Materialia, 132, 455-466, 2017.

A survey of ab-initio calculations shows that segregation-induced grain boundary embrittlement is predicted by bond-breaking arguments, M.A. Gibson, C.A. Schuh, Scripta Materialia, 113, 55-58, 2016.

Deformation of metallic glasses: Recent developments in theory, simulations, and experiments, T.C. Hufnagel, C.A. Schuh, M.L. Falk, Acta Materialia, -1, 1-19, 2016.

Effect of Crystal Orientation on Nanoindentation Behavior in Magnesium, H. Somekawa, C.A. Schuh, Metallurgical and Materials transactions A, 47, 3227-3234, 2016.

Sub-scale ballistic testing of an ultrafine grained tungsten alloy into concrete targets, Z.C. Cordero, R.R. Carpenter, C.A. Schuh, B.E. Schuster, International Journal of Impact Engineering, 91, 1-5, 2016.

Effect of twin boundaries on indentation behavior of magnesium alloys, H. Somekawa, A. Singh, C.A. Schuh, Journal of Alloys and Compounds, 685, 1016-1023, 2016.

Texture mediated grain boundary network design in two dimensions, O.K. Johnson, C.A. Schuh, Journal of Materials Research, 31, 1171-1184, 2016.

A compilation of ab-initio calculations of embrittling potencies in binary metallic alloys, M.A. Gibson, C.A. Schuh, Data in brief, 6, 143-148, 2016.

Kinetic Monte Carlo Modeling of Nanomechanics in Amorphous Systems, E.R. Homer , L. Li, C.A. Schuh, Multiscale Materials Modeling for Nanomechanics, 441-468, 2016.

Phase strength effects on chemical mixing in extensively deformed alloys, Z.C. Cordero, C.A. Schuh, Acta Materialia, 82, 123-136, 2015.

Accelerated sintering in phase-separating nanostructured alloys, M. Park, C.A. Schuh, Nature Communications, 6, 2015.

Experimental assessment and simulation of surface nanocrystallization by severe shot peening, S.M. Hassani-Gangaraj, K.S. Cho, H.L. Voigt, C.A. Schuh, Acta Materialia, 97, 105-115, 2015.

Diffusion of tungsten in chromium: Experiments and atomistic modeling, M. Park, K.C. Alexander, C.A. Schuh, Journal of Alloys and Compounds, 611, 433-439, 2014.

Powder-Route Synthesis and Mechanical Testing of Ultrafine Grain Tungsten Alloys, Z.C. Cordero, E.L. Huskins, M. Park, S. Livers, M. Frary, et al., Metallurgical and Materials Transactions A, 45, 3609-3618, 2014.

Anomalous grain refinement trends during mechanical milling of Bi2Te3, S.A. Humphry-Baker, C.A. Schuh, Acta Materialia, 75, 167-179, 2014.

Grain growth and structural relaxation of nanocrystalline Bi2Te3, S.A. Humphry-Baker, C.A. Schuh, Journal of Applied Physics, 116, 153502, 2014.

Suppression of grain growth in nanocrystalline Bi2Te3 through oxide particle dispersions, S.A. Humphry-Baker, C.A. Schuh, Journal of Applied Physics, 116, 173505, 2014.

Microstructure and mechanical properties of electrodeposited Al(1-x)Mn(x)/Al(1-y)Mn(y) nanostructured multilayers, W. Cai, C.A. Schuh, Journal of Materials Research, 29, 2229-2239, 2014.

Finite Element Simulation of Hot Nanoindentation in Vacuum, H. Lee, Y. Chen, A. Claisse, C.A. Schuh, Experimental Mechanics, 53, 1201-1211, 2013.

Shear transformation zone dynamics model for metallic glasses incorporating free volume as a state variable, L. Li, E.R. Homer, C.A. Schuh, Acta Materialia, 61, 3347-3359, 2013.

Distribution of Thermally Activated Plastic Events in a Flowing Glass, D. Rodney, C.A. Schuh, Physical Review Letters, 102, 235503, 2009.

Mesoscale structure and segregation in electrodeposited nanocrystalline alloys, S. Ruan, C.A. Schuh, Scripta Materialia, 59, 1218-1221, 2008.

The Hall-Petch breakdown at high strain rates: Optimizing nanocrystalline grain size for impact applications, J.R. Trelewicz, C.A. Schuh, Applied Physics Letters, 93, 171916, 2008.

Thickness of anodic titanium oxides as a function of crystallographic orientation of the substrate, M.V. Diamanti, M.P. Pedeferri, C.A. Schuh, Metallurgical and Materials Transactions A, 39, 2143-2147, 2008.

Mechanical properties of reticulated aluminium foams with electrodeposited Ni-W coatings, Y. Boonyongmaneerat, C.A. Schuh, D.C. Dunand, Scripta Materialia, 59, 336, 2008.

Strength, plasticity and brittleness of bulk metallic glasses under compression: statistical and geometric effects, W.F. Wu, Y. Li, C.A. Schuh, Philosophical Magazine, 88, 71-89, 2008.

Mechanics of indentation of plastically graded materials-II: Experiments on nanocrystalline alloys with grain size gradients, I.S. Choi, A.J. Detor, R. Schwaiger, M. Dao, C.A. Schuh, Journal of the Mechanics and Physics of Solids, 56, 172, 2008.

Stability of Nanocrystalline Alloys

T. Chookajorn, et al., Science, 337, 951-954, 2012.
Nanocrystalline materials are desirable in a wide variety of applications; however, the energy associated with the high fraction of grain boundaries inherent in a nanocrystalline material leads to instability of the nanoscaled structure in a pure material. It has been experimentally observed that alloying elements can in some cases stabilize a nanocrystalline microstructure. Through atomisic, analytic, and experimental methods, we examine the role of varying solute species and segregation profiles on the stability and mobility of grain boundaries at the nanocrystalline length scale

Selected Publications:
Phase transitions in stable nanocrystalline alloys, A.R. Kalidindi, C.A. Schuh, Journal of Materials Research, 32, 1993-2002, 2017.

Grain boundary segregation in Al-Mn electrodeposits prepared from ionic liquid, T. Huang, C.J. Marvel, P.R. Cantwell, M.P. Harmer, C.A. Schuh, Journal of Materials Science, 51, 438-448, 2016.

Sputtered Hf-Ti nanostructures: A segregation and temperature stability study, M.N. Polyakov, T. Chookajorn, M. Mecklenburg, C.A. Schuh, A.M. Hodge, Acta Materialia, 108, 8-16, 2016.

Thermal stability comparison of nanocrystalline Fe-based binary alloy pairs, B.G. Clark, K. Hattar, M.T. Marshall, T. Chookajorn, B.L Boyce, et al., JOM, 68, 1625-1633, 2016.

A compound unit method for incorporating ordered compounds into lattice models of alloys, A.R. Kalidindi, C.A. Schuh, Computational Materials Science, 118, 172-179, 2016.

W-based amorphous phase stable to high temperatures, K.S. Cho, C.A. Schuh, Acta Materialia, 85, 331-342, 2015.

Duplex nanocrystalline alloys: Entropic nanostructure stabilization and a case study on W-Cr, T. Chookajorn, M. Park, C.A. Schuh, Journal of Materials Research, 30, 151-163, 2015.

Micropillar compression testing of powders, E.L. Huskins, Z.C. Cordero, C.A. Schuh, B.E. Schuster, Journal of Materials Science, 50, 1-6, 2015.

Nanocrystalline materials at equilibrium: A thermodynamic review, A.R. Kalidindi, T. Chookajorn, C.A. Schuh, JOM, 67, 2834-2843, 2015.

Thermodynamics of stable nanocrystalline alloys: A Monte Carlo analysis, T. Chookajorn, C.A. Schuh, Physical Review B, 89, 064102, 2014.

Nanoscale segregation behavior and high-temperature stability of nanocrystalline W-20 at.% Ti, T. Chookajorn, C.A. Schuh, Acta Materialia, 73, 128-138, 2014.

Estimation of grain boundary segregation enthalpy and its role in stable nanocrystalline alloy design , H.A. Murdoch, C.A. Schuh, Journal of Materials Research, 28, 2154-2163, 2013.

Stability of binary nanocrystalline alloys against grain growth and phase separation, H.A. Murdoch, C.A. Schuh, Acta Materialia, 61, 2121-2132, 2013.

Design of Stable Nanocrystalline Alloys, T. Chookajorn, H.A. Murdoch, C.A. Schuh, Science, 337, 951-954, 2012.

Microstructural evolution during the heat treatment of nanocrystalline alloys, A.J. Detor, C.A. Schuh, Journal of Materials Research, 22, 3233-3248, 2007.

Grain Boundary Networks

O.K. Johnson, et al., Acta Materialia, 61, 2863-2873, 2013.
The relative fractions of different types of grain boundaries as well as their connectivity throughout the grain boundary network can greatly affect macroscopic materials properties such as resistance to corrosion and intergranular fracture. Through theoretical and experimental approaches, we investigate the properties of the grain boundary network space with the goal of advancing the field of microstructure design.

Selected Publications:
Elasticity of random multiphase materials: percolation of the stiffness tensor, Y. Chen, C.A. Schuh, Journal of Statistical Physics, 162, 1-10, 2016.

Inferring grain boundary structure-property relations from effective property measurements, O.K. Johnson, L. Li, M.J. Demkowicz, C.A. Schuh, Journal of Materials Science, 50, 1-13, 2015.

The triple junction hull: Tools for grain boundary network design, O.K. Johnson, C.A. Schuh, Journal of the Mechanics and Physics of Solids, 69, 2-13, 2014.

Symmetries in the representation of grain boundary-plane distributions, S. Patala, C.A. Schuh, Philosophical Magazine, 93, 524-573, 2013.

The uncorrelated triple junction distribution function: Towards grain boundary network design, O.K. Johnson, C.A. Schuh, Acta Materialia, 61, 2863-2873, 2013.

Hyperspherical harmonics for the representation of crystallographic texture, J.K. Mason, C.A. Schuh, Acta Materialia, 56, 6141-6155, 2008.

Grain Boundary Properties

C. Deng, et al., Physical Review B, 84, 214102, 2011.
Grain boundary structure is defined by 5 geometric parameters related to the relative rotation and inclination of the two grains that are in contact. The properties of individual grain boundaries vary widely across this space. Through computational methods including Molecular Dynamics, Monte Carlo, and the Activation-Relaxation Technique, we study the relationship between grain boundary structure and properties.

Selected Publications:
Preferred nanocrystalline configurations in ternary and multicomponent alloys, W. Xing, A.R. Kalidindi, C.A. Schuh, Scripta Materialia, 127, 136-140, 2017.

Segregation-induced changes in grain boundary cohesion and embrittlement in binary alloys, M.A. Gibson, C.A. Schuh, Acta Materialia, 95, 145-155, 2015.

Grain boundary networks in nanocrystalline alloys from atom probe tomography quantization and autocorrelation mapping, Y. Chen, C.A. Schuh, Physica Status Solidi A, 212, 1-7, 2015.

Comparison of molecular dynamics simulation methods for the study of grain boundary migration , M.I. Mendelev, C. Deng, C.A. Schuh, D.J. Srolovitz, Modelling and Simulation in Materials Science and Engineering, 21, 045017-045030, 2013.

Exploring grain boundary energy landscapes with the activation-relaxation technique, K.C. Alexander, C.A. Schuh, Scripta Materialia, 68, 937-940, 2013.

Diffusive-to-Ballistic Transition in Grain Boundary Motion Studied by Atomistic Simulations, C. Deng, C.A. Schuh, Physical Review B, 84, 214102, 2011.

Multilayer Corrosion Coatings

S.R. Cross, et al., Corrosion Science, 77, 297-307, 2013.
Multilayer coatings have shown improved performance over their single layer counterparts. Through electrolytic deposition, fine control over the composition and microstructure of the final coating can be obtained. Processing and performance of multilayer coatings are studied both experimentally and computationally in our group.

Selected Publications:
Orientation dependence in superelastic Cu-Al-Mn-Ni micropillars, J. Fornell, N. Tuncer, C.A. Schuh, Journal of Alloys and Compounds, 693, 1205-1213, 2017.

Ternary alloying additions and multilayering as strategies to enhance the galvanic protection ability of Al-Zn coatings electrodeposited from ionic liquid solution, S.R. Cross, C.A. Schuh, Electrochimica Acta, 2016.

A high-throughput technique for determining grain boundary character non-destructively in microstructures with through-thickness grains, M. Seita, M. Volpi, S. Patala , I. McCue, C.A. Schuh, M.V. Diamanti, J. Erlenbaches, M.J. Demkowicz, npj Computational Materials, 2016.

Crystal orientation dependence of the stress-induced martensitic transformation in zirconia-based shape memory ceramics, X.M. Zeng, A. Lai, C.L. Gana, C.A. Schuh, Acta Materialia, 116, 124-135, 2016.

Towards the reliable calculation of residence time for off-lattice kinetic Monte Carlo simulations, K.C. Alexander, C.A. Schuh, Modelling and Simulation in Materials Science and Engineering, 24, 065014, 2016.

Melt-driven mechanochemical phase transformations in moderately exothermic powder mixtures, S.A. Humphry-Baker, S. Garroni, F. Delogu, C.A. Schuh, Nature Materials, doi:10.1038/nmat4732, 2016.

Six decades of the Hall-Petch effect - a survey of grain-size strengthening studies on pure metals, Z.C. Cordero, B.E. Knight, C.A. Schuh, International Materials Reviews , 61, 495-512, 2016.

Validated numerical modeling of galvanic corrosion of zinc and aluminum coatings, S.R. Cross, S. Gollapudi, C.A. Schuh, Corrosion Science, 88, 226-233, 2014.

Computational Design and Optimization of Multilayered and Functionally Graded Corrosion Coatings, S.R. Cross, R. Woollamb, S. Shademanb, C.A. Schuh, Corrosion Science, 77, 297-307, 2013.

Strategy to improve the high-temperature mechanical properties of Cr-alloy Coatings, M.J.L. Gines, F.J. Williams, C.A. Schuh, Metallurgical and Materials Transactions A, 38, 1367-1370, 2007.