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Journal Papers (accepted and in press)

68.      Y.H. Zhang, Y.F. Gao, L. Nicola*, "Lattice rotation caused by wedge indentation of a single crystal: dislocation dynamics compared to crystal plasticity simulations." Journal of the Mechanics and Physics of Solids, in press.

67.      Y.Z. Xia, T.L. Li*, F. Ren, Y.F. Gao, H. Wang, "Failure analysis of pinch-torsion tests as a thermal runaway risk evaluation method of Li-ion cells." Journal of Power Sources, in press.

66.      H.L. Jia, F.X. Liu, Z.N. An, W.D. Li, G.Y. Wang, J.P. Chu, J.S.C. Jang, Y.F. Gao, P.K. Liaw*, "Thin-film metallic glasses for substrate fatigue-property improvements." Thin Solid Films (invited review), in press [DOI].

Journal Papers (published)

2014

65.      K.E. Johanns*, J.H. Lee, Y.F. Gao, G.M. Pharr, "An evaluation of the advantages and limitations in simulating indentation cracking with cohesive zone finite elements." Modelling and Simulations in Materials Science and Engineering, vol. 22, no. 1, 015011, January 2014 [DOI].

2013

64.      W.D. Li, H. Bei*, Y. Tong, W. Dmowski, Y.F. Gao*, "Structural heterogeneity induced plasticity in bulk metallic glasses: From well-relaxed fragile glass to metal-like behavior." Applied Physics Letters, vol. 103, iss. 17, 171910, October 2013 [DOI].

63.      S.F. Li, X.J. Zhao, X.S. Xu, Y.F. Gao*, Z.Y. Zhang*, "Stacking principle and magic sizes of transition metal nanoclusters based on generalized Wulff construction." Physical Review Letters, vol. 111, iss. 11, 115501, 9/13/2013 [DOI].

62.      W.D. Li, H. Bei*, J. Qu, Y.F. Gao*, "Effects of machine stiffness on the load-displacement curve during spherical nano-indentation." Journal of Materials Research, vol. 28, iss. 14, pp. 1903-1911, July 2013 [DOI].

61.      J. Kwon, M.C. Brandes, P. Sudharshan Phani, A.P. Pilchak, Y.F. Gao, E.P. George, G.M. Pharr, M.J. Mills*, "Characterization of deformation anisotropies in an alpha-Ti alloy by nanoindentation and electron microscopy." Acta Materialia, vol. 61, iss. 13, pp. 4743-4756, August 2013 [DOI].

60.      C.H. Yu, C.W. Huang, C.S. Chen, Y.F. Gao, C.H. Hsueh*, "A micromechanics study of competing mechanisms for creep fracture of zirconium diboride polycrystals." Journal of the European Ceramic Society, vol. 33, iss. 10, pp. 1625-1637, September 2013 [DOI].

59.      D. Catoor*, Y.F. Gao, J. Geng, M.J.N.V. Prasad, E.G. Herbert, K.S. Kumar, G.M. Pharr, E.P. George, "Incipient plasticity and deformation mechanisms in single-crystal Mg during spherical nanoindentation." Acta Materialia, vol. 61, iss. 8, pp. 2953-2965, May 2013 [DOI].

58.      S.H. Wee, Y.F. Gao, Y.L. Zuev, K.L. More, J.Y. Meng, J.X. Zhong, G.M. Stocks, A. Goyal*, "Self-assembly of nanostructured, complex, multication films via spontaneous phase separation and strain-driven ordering." Advanced Functional Materials, vol. 23, pp. 1912-1918, April 2013 [DOI].

57.      L.L. Zheng, Y.F. Gao*, Y.D. Wang, A.D. Stoica, K. An, X.L. Wang, "Grain orientation dependence of lattice strains and intergranular damage rates in polycrystals under cyclic loading." Scripta Materialia, vol. 68, iss. 5, pp. 265-268, March 2013 [DOI].

2012

56.      W. Wu, S.Y. Lee*, A.M. Paradowska, Y.F. Gao, P.K. Liaw, "Twinning-detwinning behavior during fatigue-crack propagation in a wrought magnesium alloy AZ31B." Materials Science and Engineering A, vol. 556, pp. 278-286, October 2012 [DOI].

55.      T.L. Li, H. Bei, J.R. Morris, E.P. George, Y.F. Gao*, "Scale effects in the convoluted thermal/spatial statistics of plasticity initiation in small stressed volumes during nanoindentation." Materials Science and Technology (invited), special issue in: Hardness across the Multi-Scales of Structure and Loading Rate (edited by R. Armstrong et al.), vol. 28, no. 9-10, pp. 1055-1059, 2012 [DOI].

54.      C.H. Yu, C.W. Huang, C.S. Chen, Y.F. Gao, C.H. Hsueh*, "Effects of grain boundary heterogeneities on creep fracture studied by rate-dependent cohesive model." Engineering Fracture Mechanics, vol. 93, pp. 48-64, October 2012 [DOI].

53.      J.H. Lee, Y.F. Gao*, K.E. Johanns, G.M. Pharr, "Cohesive interface simulations of indentation cracking as a fracture toughness measurement method for brittle materials." Acta Materialia, vol. 60, iss. 15, pp. 5448-5467, 2012 [DOI].

52.      Z.N. An, W.D. Li, F.X. Liu, P.K. Liaw, Y.F. Gao*, "Interface constraints on shear band patterns in bonded metallic glass films under micro-indentation." Metallurgical and Materials Transactions A, vol. 43, iss. 8, pp. 2729-2741, 2012 [DOI].

51.      M.C. Liu, J.C. Huang*, K.W. Chen, J.F. Lin, W.D. Li, Y.F. Gao, T.G. Nieh, "Is the compression of tapered micro and nanopillar samples a legitimate technique for the identification of deformation mode change in metallic glasses?" Scripta Materialia, vol. 66, iss. 10, pp. 817-820, 2012 [DOI].

50.      S.Y. Huang, D.W. Brown, B. Clausen, Z.K. Teng, Y.F. Gao, P.K. Liaw*, "In situ neutron-diffraction studies on the creep behavior of a ferritic superalloy." Metallurgical and Materials Transactions A, vol. 43, no. 5, pp. 1497-1508, 2012 [DOI].

49.      J.H. Lee, Y.F. Gao*, G.M. Pharr, "Effective Poisson's ratio from combined normal and lateral contacts of single crystals." Journal of Materials Research, vol. 27, iss. 1, pp. 182-191, 2012 [DOI].

2011

48.      L. Wang, H. Bei, Y.F. Gao, Z.P. Lu, T.G. Nieh*, "Effect of residual stresses on the onset of yielding in a Zr-based metallic glass." Acta Materialia, vol. 59, iss. 20, pp. 7627-7633, 2011 [DOI].

47.      L.L. Zheng, Y.F. Gao*, S.Y. Lee, R.I. Barabash, J.H. Lee, P.K. Liaw, "Intergranular strain evolution near fatigue crack tips in polycrystalline metals." Journal of the Mechanics and Physics of Solids, vol. 59, iss. 11, pp. 2307-2322, 2011 [DOI].

46.      J. Annett, Y.F. Gao*, G.L.W. Cross*, E.G. Herbert, B.N. Lucas, "Mesoscale friction anisotropy revealed by slidingless tests." Journal of Materials Research, vol. 26, no. 18, pp. 2373-2378, 2011 [DOI].

45.      C. Cantoni*, Y.F. Gao, S.H. Wee, E.D. Specht, J. Gazquez, J.Y. Meng, S.J. Pennycook, A. Goyal, "Strain-driven oxygen deficiency in self-assembled, nanostructured, composite oxide films." ACS Nano, vol. 5, iss. 6, pp. 4783-4789, 2011 [DOI].

44.      L. Wang, H. Bei, T.L. Li, Y.F. Gao, E.P. George, T.G. Nieh*, "Determining the activation energies and slip systems for dislocation nucleation in body-centered cubic Mo and face-centered cubic Ni single crystals." Scripta Materialia, vol. 65, pp. 179-182, 2011 [DOI].

43.      T.L. Li, Y.F. Gao*, H. Bei, E.P. George, "Indentation Schmid factor and orientation dependence of nanoindentation pop-in behavior of NiAl single crystals." Journal of the Mechanics and Physics of Solids, vol. 59, pp. 1147-1162, 2011 [DOI].

42.      Y.F. Gao*, L. Wang, H. Bei, T.G. Nieh, "On the shear band direction in metallic glasses." Acta Materialia, vol. 59, pp. 4159-4167, 2011 [DOI].

41.      R.I. Barabash*, H. Bei, G.E. Ice, Y.F. Gao, O.M. Barabash, "3D x-ray strain microscopy in two-phase composites at submicron length scales." JOM (invited), vol. 63, no. 3, pp. 30-34, March 2011 [LINK].

40.      L. Wang, H. Bei, Y.F. Gao, Z.P. Lu, T.G. Nieh*, "Effect of residual stresses on the hardness of bulk metallic glasses." Acta Materialia, vol. 59, pp. 2858-2864, 2011 [DOI].

39.      R.I. Barabash*, H. Bei, Y.F. Gao, G.E. Ice, "Interface strength in NiAl-Mo composites from 3D x-ray microdiffraction." Scripta Materialia, vol. 64, iss. 9, pp. 900-903, 2011 [DOI].

38.      J.H. Lee, Y.F. Gao*, "Mixed-mode singularity and temperature effects on dislocation nucleation in strained interconnects." International Journal of Solids and Structures, vol. 48, pp. 1180-1190, 2011 [DOI].

2010

37.      Y.F. Gao*, "A Peierls perspective on mechanisms of atomic friction." Journal of the Mechanics and Physics of Solids, vol. 58, iss. 12, pp. 2023-2032, 2010 [DOI].

36.      R.I. Barabash*, Y.F. Gao, G.E. Ice, O.M. Barabash, J.-S. Chung, W. Liu, R. Kroeger, H. Lohmeyer, K. Sebald, J. Gutowski, T. Boettcher, D. Hommel, "Mapping strain gradients in the FIB-structured InGaN/GaN multilayered films with 3D x-ray microbeam." Materials Science and Engineering A, special issue in Probing Strains and Dislocation Gradients with Diffraction, vol. 528, iss. 1, pp. 52-57, 2010 [DOI].

35.      R.I. Barabash*, H. Bei, Y.F. Gao, G.E. Ice, "Indentation-induced localized deformation and elastic strain partitioning in composites at submicron length scale." Acta Materialia, vol. 58, iss. 20, pp. 6784-6789, 2010 [DOI].

34.      G.M. Pharr*, E.G. Herbert, Y.F. Gao, "The indentation size effect: a critical examination of experimental observations and mechanistic interpretations." Annual Review of Materials Research (invited), vol. 40, pp. 271-292, June 2010 [LINK].

33.      C.J. Su, J.A. LaManna, Y.F. Gao*, W.C. Oliver, G.M. Pharr, "Plastic instability in amorphous selenium near its glass transition temperature." Journal of Materials Research, vol. 25, no. 6, pp. 1015-1019, June 2010 [DOI].

32.      Y. Yang*, J. Ye, J. Lu, Y.F. Gao, P.K. Liaw, "Metallic glasses: gaining plasticity for microsystems." JOM (invited), vol. 62, no. 2, pp. 93-98, February 2010 [LINK] [DOI].

31.      S. Zheng, W. Zhu, Y.F. Gao, G.M. Stocks, Z. Zhang*, "Kinetic Monte Carlo simulations of nanocolumn formation in two-component epitaxial growth." Applied Physics Letters, 96, 071913, 2010 [DOI] [LINK].

30.      R.I. Barabash*, H. Bei, Y.F. Gao, G.E. Ice, E.P. George, "3D x-ray microscope investigation of local dislocation densities and elastic strain gradients in a NiAl-Mo composite and exposed Mo micropillars as a function of pre-strain." Journal of Materials Research (invited), 25, 199-206, 2010 [Erratum] [DOI].

2009

29.      T.L. Li, J.H. Lee, Y.F. Gao*, "An approximate formulation of the effective indentation modulus of elastically anisotropic film-on-substrate systems." International Journal of Applied Mechanics (invited), special issue in Theoretical and Computational Nanomechanics (edited by P. Sharma), 1, 515-525, 2009 [LINK] [DOI].

28.      F.X. Liu*, F.Q. Yang, Y.F. Gao, W.H. Jiang, Y.F. Guan, P.D. Rack, O. Sergic, P.K. Liaw "Micro-scratch study of a magnetron-sputtered Zr-based metallic-glass film." Surface & Coatings Technology, 203, 3480-3484, 2009 [DOI].

27.      T.L. Li, J.H. Lee, Y.F. Gao*, G.M. Pharr, M. Huang, T.Y. Tsui, "Geometric effects on dislocation nucleation in strained electronics." Applied Physics Letters, 94, 171905, 2009 [DOI] [LINK].

2008

26.      Y.F. Gao*, J.Y. Meng, A. Goyal, G.M. Stocks, "Spatial ordering and anisotropy in surface stress domains and nanostructural evolution." JOM (invited), vol. 60, no. 9, pp. 54-58, September 2008 [LINK] [DOI].

25.      R. Barabash*, Y.F. Gao, Y. Sun, S. Lee, H. Choo, P.K. Liaw, D.W. Brown, G.E. Ice, "Neutron and x-ray diffraction studies and cohesive interface model of the fatigue crack deformation behavior." Philosophical Magazine Letters, 88(8), 553-565, 2008 [DOI].

24.      Y.F. Gao*, H.H. Yu, K.-S. Kim, "Micro-plasticity of surface steps under adhesive contact: Part II - Multiple-dislocation mediated contact loading." Journal of the Mechanics and Physics of Solids, 56, 2759-2772, 2008 [DOI].

23.      F.X. Liu, Y.F. Gao*, P.K. Liaw, "Rate-dependent deformation behavior of Zr-based metallic-glass coatings examined by nanoindentation." Metallurgical and Materials Transactions A, 39, 1862-1867, 2008 [DOI].

·        as part of the special issue, August 2008, Eds: P.K. Liaw, W.H. Jiang, G.J. Fan, H. Choo, and Y.F. Gao [DOI].

22.      Y.F. Gao*, H.T. Xu, W.C. Oliver, G.M. Pharr, "A comparison of Coulomb friction and friction stress models based on multidimensional nanocontact experiments." Trans. of ASME, Journal of Applied Mechanics, 75, 034504, 2008 [LINK] [DOI].

21.      Y.F. Gao*, J. Lou, "Dislocation nucleation and pileup under a wedge contact at nanoscale." Journal of Nanomaterials (invited), special issue in: Nanomechanics and Nanostructured Multifunctional Materials: Experiments, Theories and Simulations (edited by J. Wang and J. Lou), Article ID 380961, 2008 [LINK] [DOI].

20.      H. Bei, Y.F. Gao*, S. Shim, E.P. George, G.M. Pharr, "Strength differences arising from homogeneous versus heterogeneous dislocation nucleation." Physical Review B, 77, 060103(R), February 29, 2008 [LINK] [DOI].

19.      Y.F. Gao*, H.T. Xu, W.C. Oliver, G.M. Pharr, "Effective elastic modulus of film-on-substrate systems under normal and tangential contact." Journal of the Mechanics and Physics of Solids, 56, 402-416, 2008 [DOI].

2007

18.      F.X. Liu*, P.K. Liaw, W.H. Jiang, C.L. Chiang, Y.F. Gao, Y.F. Guan, J.P. Chu, P.D. Rack, "Fatigue-resistance enhancements by glass-forming metallic films." Materials Science and Engineering A, 468-470, pp. 246-252, 2007 [DOI].

17.      Y.F. Gao*, G.M. Pharr, "Multidimensional contact moduli of elastically anisotropic solids." Scripta Materialia, 57, 13-16, 2007 [DOI].

16.      S.M. Xia, Y.F. Gao*, A.F. Bower, L.C. Lev, Y.-T. Cheng, "Delamination mechanism maps for a strong elastic coating on an elastic-plastic substrate subjected to contact loading." International Journal of Solids and Structures, 44, 3685-3699, 2007 [DOI].

15.      Y.F. Gao*, B. Yang, T.G. Nieh, "Thermomechanical instability analysis of inhomogeneous deformation in amorphous alloys." Acta Materialia, 55, 2319-2327, 2007 [DOI].

14.      C. Fan*, Y.F. Gao, H.Q. Li, H. Choo, P.K. Liaw, A. Inoue, C.T. Liu, "Mechanical behavior of a Zr-based bulk metallic glass and its composite at cryogenic temperatures." Journal of Materials Research, 22, 445-452, 2007.

13.      H.H. Yu, P. Shrotriya, Y.F. Gao, K.-S. Kim*, "Micro-plasticity of surface steps under adhesive contact: Part I, surface yielding controlled by single-dislocation nucleation." Journal of the Mechanics and Physics of Solids, 55, 489-516, 2007 [DOI].

2006

12.      C. Fan*, P.K. Liaw, T.W. Wilson, H. Choo, Y.F. Gao, C.T. Liu, Th. Proffen, J.W. Richardson, "Pair distribution function study and mechanical behavior of as-cast and structurally relaxed Zr-based bulk metallic glasses." Applied Physics Letters, 89, 231920, 2006 [DOI].

11.      Y.F. Gao*, "An implicit finite element method for simulating inhomogeneous deformation and shear bands of amorphous alloys based on the free-volume model." Modelling and Simulation in Materials Science and Engineering, 14, 1329-1345, 2006 [DOI].

·         Codes developed in this paper are available for download [Help File] [Fortran Source File] [Abaqus Input File #1] [Abaqus Input File #2].

10.      Y.F. Gao*, B.N. Lucas, J.C. Hay, W.C. Oliver, G.M. Pharr, "Nanoscale incipient asperity sliding and interface micro-slip assessed by the measurement of tangential contact stiffness." Scripta Materialia, 55, 653-656, 2006 [DOI].

9.      Y.F. Gao, A.F. Bower*, "Elastic-plastic contact of a rough surface with Weierstrass profile." Proceeding of Royal Society London, Series A, 462, 319-348, 2006 [DOI].

8.      Y.F. Gao*, A.F. Bower, K.-S. Kim, L.C. Lev, Y.T. Cheng, "The behavior of an elastic-perfectly plastic sinusoidal surface under contact loading." Wear, 261, 145-154, 2006 [DOI].

2005

2004

7.      Y.F. Gao*, A.F. Bower, "A simple technique for avoiding convergence problems in finite element simulations of crack nucleation and growth on cohesive interfaces." Modelling and Simulation in Materials Science and Engineering 12, 453-463, 2004 [DOI].

·         Codes developed in this paper are available for download [Help File] [Fortran Source File] [Abaqus Input File].

6.      Z. Suo*, Y.F. Gao, G. Scoles, "Nanoscale domain stability in organic monolayers on metals." Trans. of ASME, Journal of Applied Mechanics, 71, 24-31, 2004 [DOI].

2003

5.      Y.F. Gao*, "Passing stiffness anisotropy in multilayers and its effects on nanoscale surface self-organization." International Journal of Solids and Structures 40, 6429-6444, 2003 [Erratum] [DOI].

4.      Y.F. Gao, Z. Suo*, "Guided self-assembly of molecular dipoles on a substrate surface." Journal of Applied Physics 93, 4276-4282, 2003 [DOI].

·         This article also appeared in Virtual Journal of Nanoscale Science & Technology 7, issue 14, 2003.

3.      Y.F. Gao*, Z. Suo, "The orientation of the self-assembled monolayer stripes on a crystalline solid." Journal of the Mechanics and Physics of Solids 51, 147-167, 2003 [DOI].

2002

2.      Y.F. Gao, W. Lu, Z. Suo*, "A mesophase transition in a binary monolayer on a solid surface." Acta Materialia 50, 2297-2308, 2002 [DOI].

1.      Y.F. Gao, Z. Suo*, "Domain dynamics in a ferroelastic epilayer on a paraelastic substrate." Trans. of ASME, Journal of Applied Mechanics 69, 419-424, 2002 [DOI].

_____________________________

Book Chapters

1.      Y.F. Gao, A.F. Bower, "Rough surface plasticity and adhesion across length scales." In: Nanomechanics of Materials and Structures, edited by T.-J. Chuang, P.M. Anderson, M.-K. Wu and S. Hsieh, pp. 277-287, Springer, the Netherlands, 2006.

Conference Publications

1.      Y.F. Gao*,, "On the manipulation of nanoscale self-assembly by elastic field." Mat. Res. Soc. Symp. Proc. Vol. 794, T9.3, 2004 [PDF].

2.      Y.F. Gao*,, A.F. Bower, K.-S. Kim, "Some issues of rough surface contact plasticity at micro- and nano-scale." Mat. Res. Soc. Symp. Proc. Vol. 841, R.7.3, 2005 [PDF].

3.      Y.F. Gao*, "A micromechanical dislocation model of rough surface contact plasticity." Proceeding of World Tribology Conference, Washington DC, 2005 [PDF].

4.      F.X. Liu*, C.L. Chiang, J.P. Chu, Y.F. Gao, P.K. Liaw, "Effects of glass-forming metallic film on the fatigue behavior of C-2000 Ni-based alloy." Mat. Res. Soc. Symp. Proc. Vol. 903E, 0903-Z14-13.1, 2006 [PDF].

5.      J.H. Lee, C. Zhou, C.J. Su, Y.F.Gao*, G.M. Pharr "Similarity relationships in creep contacts and applications in nanoindentation tests." Mat. Res. Soc. Symp. Proc. Vol. 1224, FF07-08, 2010 [PDF] [Erratum] [DOI].

6.      T.L. Li, J.H. Lee, Y.F. Gao*, "Finite element studies of homogeneous and heterogeneous dislocation nucleation based on the Rice-Peierls framework." Mat. Res. Soc. Symp. Proc. Vol. 1363, RR03-01, 2011 [PDF] [DOI].

Other Publications

1.      P.K. Liaw, W.H. Jiang, G.J. Fan, H. Choo, and Y.F. Gao, (eds.), special issue of Symposium on Bulk Metallic Glasses IV (TMS Annual Spring Meeting, Orlando, FL, 2/26~3/1/2007), Metallurgical and Materials Transactions A, Vol. 39, No. 8, p. 1761, August 2008 [DOI].

2.      P.K. Liaw, W.H. Jiang, H. Choo, and Y.F. Gao, (eds.), special issue of Symposium on Bulk Metallic Glasses V (TMS Annual Spring Meeting, New Orleans, LA, 3/9~3/13/2008), Advanced Engineering Materials, Vol. 10, No. 11, p. 995, November 2008 [DOI].

3.      P.K. Liaw, H. Choo, Y.F. Gao, and G.Y. Wang (eds.), special issue of Symposium on Bulk Metallic Glasses VI (TMS Annual Spring Meeting, San Francisco, CA, 2/15~2/19/2009), Metallurgical and Materials Transactions A, Vol. 41, No. 7, p. 1627, July 2010 [DOI].

4.      Journal of Materials Research, Focus Issue: Self-Assembly and Directed Assembly of Advanced Materials, Vol. 26, No. 2, January 2011 [PDF]. Guest editors (A. Goyal, J. Narayan, and Q. Lin), Principal editors (D.H. Gracias, Yanfei Gao, J.J. Watkins, A. Saiani, and Z. Lin).

5.      P.K. Liaw, G.Y. Wang, H. Choo, and Y.F. Gao (eds.), special issue of Symposium on Bulk Metallic Glasses VII (TMS Annual Spring Meeting, Seattle, WA, 2/14~2/18/2010), Metallurgical and Materials Transactions A, Vol. 42, No. 6, p. 1449, June 2011 [DOI].

6.      P.K. Liaw, G.Y. Wang, H. Choo, and Y.F. Gao (eds.), special issue of Symposium on Bulk Metallic Glasses VIII (TMS Annual Spring Meeting, San Diego, CA, 2/27~3/3/2011), Metallurgical and Materials Transactions A, Vol. 43, No. 8, p. 2591, August 2012 [DOI].

7.      P.K. Liaw, G.Y. Wang, H. Choo, and Y.F. Gao (eds.), special issue of Symposium on Bulk Metallic Glasses IX (TMS Annual Spring Meeting, Orlando, FL, 3/11~3/15/2012), Metallurgical and Materials Transactions A, Vol. 44, No. 5, p. 1979, May 2013 [DOI].

 
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