SN_headshot_ORNL

Soumya Nag

Senior Staff Scientist

Soumya Nag is in the Materials Science and Technology Division at Oak Ridge National Laboratory. His research interest is understanding processing (additive and conventional) - structure (phase transformation across different length and time scales) - property (mechanical and environmental property) relationships in light weight and high temperature structural alloys. 

 

  • 2021- Present: Senior R&D Staff, MSTD, Oak Ridge National Laboratory, Oak Ridge, TN
  • 2019 - Present: Adjunct Assistant Professor, Clarkson University-CRC, Schenectady, NY
  • 2014 - 2021: Senior Scientist, Structural Materials Division, GE Research, Niskayuna, NY
  • 2011 - 2014: Manager, Center for Advanced Research and Technology, UNT, Denton, TX
  • 2009 - 2014: Research Assistant Professor, Mat. Sci. Eng. Department, UNT, Denton, TX
  • The Ohio State University, Columbus, OH, Materials Science and Engineering, Ph.D. 
  • The Ohio State University, Columbus, OH, Materials Science and Engineering, M.S. 
  • Indian Institute of Technology, Kharagpur, WB, India, Metallurgical Engineering, B.Tech. 

• Y. Zhang, S. Karnati, S. Nag, N. Johnson, G. Khan, B. Ribic, “Accelerated Additive Design with Probabilistic Machine Learning”, Journal of Mechanical Design, 8, 011109-1, (2022). DOI: 10.1115/1.4051699

• S. Nag, Y. Zhang, S. Karnati, L. Kerwin, A. Kitt, E. MacDonald, D. Cheung, N. Johnson, “Probabilistic Machine Learning Assisted Study of Directed Energy Deposited Ti64”, JOM, 73, 3064 (2021). https://doi.org/10.1007/s11837-021-04770-3

• R. Conteri, T. Borkar, S. Nag, D. Jaeger, X. Chen, R.V. Ramanujan, R. Banerjee, “Laser additive processing of Fe-Si-B-Cu-Nb magnetic alloys”, Journal of Manufacturing Processes, 29, 175 (2017).

• B. P. Bewlay, S. Nag, A. Suzuki and M.J. Weimer, “TiAl alloys in commercial aircraft engines”, Materials at High Temperatures, 33(4-5), 549 (2016).

• S. Meher, G.B. Viswanathan, S. Nag, H.L. Fraser and R. Banerjee, “Determination of the gamma prime/gamma interface width in a Co-Al-W alloy via coupled aberration- corrected scanning transmission electron microscopy and atom probe tomography”, Scripta Met., 121, 23 (2016).

• Y. Zheng, R.E.A. Williams, S. Nag, R. Banerjee, H.L. Fraser and D. Banerjee, “The effect of alloy composition on instabilities in the b phase of titanium alloys”, Scripta Met., 116, 49 (2016).

• Y. Zheng, R.E.A. Williams, D. Wang, R. Shi, S. Nag, P. Kami, J.M. Sosa, R. Banerjee, Y. Wang and H.L. Fraser, “Role of w phase in the formation of extremely refined intragranular a precipitates in metastable b -titanium alloys”, Acta Met., 103, 850 (2016).

• H-P Ng, P. Nandwana, A. Devaraj, M. Semblanet, S. Nag, P.N.H Nakashima, S. Meher, C.J. Bettles, M.A. Gibson, H.L. Fraser, B.C. Muddle and R. Banerjee, “Conjugated precipitation of twin-related a and Ti2Cu phases in a Ti-25V-3Cu alloy”, Acta Met., 84, 457 (2015).

• L.T. Stephenson, A.V. Ceguerra, T. Li, T. Rojhirunsakool, S. Nag, R. Banerjee, J.M. Cairney and S.P. Ringer, “Point-by-point compositional analyses for atom probe tomography”, MethodsX, 1, 12 (2014).

• T. Borkar, S. Nag, Y. Ren, J. Tiley and R. Banerjee, “Reactive spark plasma sintering (SPS) of nitride reinforced titanium alloy composites”, Journal of Alloys and Compounds, 617, 933 (2014).

• T. Rojhirunsakool, A.R.P. Singh, S. Nag, J.Y. Hwang, J. Tiley and R. Banerjee,“Temporal evolution of non-equilibrium g’ precipitates in a rapidly quenched nickel base superalloy”, Intermetallics, 54, 218 (2014).

• D. Choudhuri, N. Dendge, S. Nag, S. Meher, T. Alam, M.A. Gibson and R. Banerjee, “Homogeneous and heterogeneous precipitation mechanisms in a binary Mg-Nd alloy”, Journal of Materials Science, 49(20), 6986 (2014).

• D. Choudhuri, N. Dendge, S. Nag, M.A. Gibson and R. Banerjee, “Role of applied uniaxial stress during creep testing on precipitation in Mg-Nd alloys”, Materials Science and Engineering A, 612, 140 (2014).

• T. Rojhirunsakool, S. Nag and R. Banerjee, “Discontinuous precipitation of g’ phase in Ni-Co-Al alloys”, JOM, 66(8), 1465 (2014).

• R.J. Contieri, E.S.N. Lopes, R. Caram, A. Devaraj, S. Nag and R. Banerjee, “Effects of cooling rate on the microstructure and solute partitioning in near eutectoid Ti-Cu alloys”, 94(21), 2350 (2014).

• C Smith, S. Katakam, S. Nag, Y.R. Zhang, J.Y. Law, R. V. Ramanujan, N.B. Dahotre and R. Banerjee, “Comparison of the Crystallization behavior of Fe-Si-B-Cu and Fe- Si-B-Cu-Nb based amorphous soft magnetic alloys”, Met and Mat Trans A., 45(7), 2998 (2014).

• A. Puthucode, A. Devaraj, S. Nag, S. Bose, P. Ayyub, M. J. Kaufman and R. Banerjee, “De-vitrification of Nanoscale Phase Separated Amorphous Thin Films in the Immiscible Copper-Niobium system”, Phil. Mag., 94(15), 1622 (2014).

• C. Smith, S. Katakam, S. Nag, X. Chen, R.V. Ramanujan, N.B. Dahotre and R. Banerjee, “Improved soft magnetic properties by laser de-vitrification of Fe-Si-B amorphous magnetic alloys”, Materials Letters, 122, 155 (2014).

• A. Boyne, D. Wang, R.P. Shi, Y. Zheng, A. Behera, S. Nag, J.S. Tiley, H.L. Fraser, R. Banerjee and Y. Wang, “Pseudospinodal mechanism for fine a/b microstructures in b-Ti alloys”, Acta Met., 64, 188 (2014).

• S.V.S Prakash, S. Chattopadhyay, T. Shibata, A. Bhattacharya, S. Nag, R. Banerjee, S.D. Kelly, J.A. Kaduk, C.U. Segre and S. Shankar, “Probing local atomic structure of Sr modified Al-Si alloys”, Acta Met., 65, 185 (2014).

• T. Alam, P. Kami, L. Cao, S. Nag, C.J. Bettles, X. Wu and R. Banerjee, “On the role of C addition on alpha precipitation in a beta titanium alloy”, Met and Mat Trans A., 45(3), 1089 (2014).

• D. Choudhuri, S. Nag, N. Dendge, M.A. Gibson and R. Banerjee, “Precipitate formation in uniaxially stressed high pressure die cast binary Mg-Nd alloy during creep testing”, Magnesium Technology, 55 (2014).

• S. Nag, S.R. Paital, P. Nandwana, K. Mahdak, Y.H Ho, H. Vora, N.B. Dahotre and R. Banerjee, “Laser deposited Biocompatible Ca-P coatings on Ti-6Al-4V: Microstructural Evolution and Thermal Modeling”, MSE C., 33(1), 165 (2013).

• S. Meher, S. Nag, J. Tiley, A. Goel and R. Banerjee, “Coarsening kinetics of gamma prime precipitates in Cobalt base alloys”, Acta Met., 61, 4266 (2013).

• A.R.P. Singh, S. Nag, S. Chattopadhyay, Y. Ren, J.S. Tiley, G.B. Viswanathan, H.L. Fraser and R. Banerjee, “Mechanisms related to different generations of gamma prime precipitation during continuous cooling of a Nickel Base Superalloy”, Acta Met., 61(1), 280 (2013).

• S. Berhe, S. Nag, Z. Molinets and W.J. Youngblood, “Influence of Seeding and Bath conditions in Hydrothermal growth of very thin (~20nm) Single-Crystalline Rutile TiO2 Nanorods Films”, ACS Applied Materials and Interfaces, 5(4), 1181 (2013).

• J.S. Tiley, O. Senkov, G. Viswanathan, S. Nag, J. Hwang and R. Banerjee, “A Methodology for Determination of Gamma Prime Site Occupancies in Nickel Superalloys using Atom Probe Tomography and X-Ray Diffraction”, Met and Mat Trans. A, 44(1), 31 (2013).

• T. Rojhirunsakool, S. Meher, J. Y. Hwang, S. Nag, J. Tiley and R. Banerjee, “Influence of composition on monomodal versus multimodal gamma prime precipitation in Ni-Al- Cr alloys”, Jour. Mat. Sci., 48(2), 825 (2013).

• R. Santos-Ortiz, V. Volkov, S. Schmid, F.L. Kuo, K. Kisslinger, S. Nag, R. Banerjee, Y. Zhu and N.D. Shepherd, “The Microstructure and Electronic Band Structure of Pulsed Laser Deposited Iron Flouride Thin-Film for Battery Electrodes”, ACS Applied Materials and Interfaces, 5(7), 2387 (2013).

• Z. Wu, C. Qiu, V. Venkatesh, H. L. Fraser, R. E. A. Williams, G. B. Viswanathan, M. Thomas, S. Nag, R. Banerjee, M. H Loretto, “The Influence of Alpha2 on Properties and Microstructure in TIMETAL 6-4”, Met. and Mat. Trans. A., 44(4), 1706 (2013).

• A. Devaraj, S. Nag and R. Banerjee, “Alpha phase precipitation from phase separated beta phase in a model Ti-Mo-Al alloy studied by direct coupling of transmission electron microscopy and atom probe tomography”, Scripta Met., 69(7), 513 (2013).

• D. Choudhuri, S. Meher, S. Nag, N. Dendge, J. Hwang and R. Banerjee, “Evolution of honeycomb network of precipitates in a hot-rolled commercial Mg-Y-Nd-Zr alloy”, Phil. Mag. Lett., 93(7), 395 (2013).

• D. Choudhuri, N. Dendge, S. Nag, M.A. Gibson and R. Banerjee, “Precipitation in Uniaxially Stressed Mg-Nd Alloys During Creep Testing”, Met. and Mat. Trans. A, 44(7), 2905 (2013).

• A. Behera, S. Nag, K. Mahdak, H. Mohseni, J. Tiley and R. Banerjee, “Influence of oxygen ingress on fine scale precipitation of a-Ti during oxidation of Beta21S, b-Ti alloy”, Jour. Mat. Sci., 48(19), 6700 (2013).

• S. Meher, T. Rojhirunsakool, J.Y. Hwang, S. Nag, J. Tiley and R. Banerjee, “Coarsening behavior of Gamma Prime Precipitates and Concurrent Transitions in the Interface Width in Ni-14 at.% Al-7 at.% Cr”, Phil. Mag. Lett., 93(9), 521 (2013).

• S. Nag and R. Banerjee, “Laser Deposition and Deformation Behavior of Ti-Nb-Zr- Ta alloys for Orthopedic Implants”, Jour. Mech. Bio. Mat., 16, 21 (2012).

• S. Nag, Y. Zheng, R. Williams, A. Devaraj, A. Boyne, Y. Wang, P.C. Collins, G.B. Viswanathan, J.S. Tiley, B.C. Muddle, R. Banerjee and H.L. Fraser, “Non-classical Homogeneous Precipitation Mediated by Compositional Fluctuations in Titanium Alloys”, Acta Met., 60(18), 6247 (2012).

• S. Meher, H-Y Yan, S. Nag, D. Dye and R. Banerjee, “Solute Partitioning and Site preference in g/g¢ Cobalt base alloys”, Scripta Met., 67(10), 850 (2012).

• T. Borkar, S. Gopagoni, S. Nag, J.Y. Hwang, P.C. Collins and R. Banerjee, “In-situ nitridation of Titanium-Molybdenum alloys during laser deposition”, Jour. Mat. Sci., 47(20), 7157 (2012).

• P. Nandwana, S. Nag, D. Hill, J.Tiley, H.L.Fraser and R. Banerjee, “On the correlation between morphology of alpha and its crystallographic orientation relationship with TiB and beta in boron containing Ti-5Al-5Mo-5V-3Cr-0.5Fe alloy”, Scripta Met., 66(8), 598 (2012).

• M. Chaudhuri, A. Singh, P. Gopal, S. Nag, G.B. Viswanathan, J. Tiley, R. Banerjee and J. Du, “Site occupancy of chromium in the gamma prime Ni3Al phase of nickel base superalloys: a combined 3D atom probe and first principles study”, Phil. Mag. Letters, 92(9), 495 (2012).

• A. Devaraj, S. Nag, R. Srinivasan, R.E.A. Williams, S.Banerjee, R. Banerjee and H.L. Fraser, “Experimental Evidence of Concurrent Compositional and Structural Instabilities Leading to Omega Precipitation in Titanium-Molybdenum Alloys”, Acta Met., 60, 596 (2012).

• S. R. Paital, A. Bhattacharya, M. Moncayo, T. Ho, K. Mahdak, S. Nag, R. Banerjee and N. B. Dahotre, “Improved Corrosion and Wear Resistance of Mg Alloys via Laser Surface Modification of Al on AZ31B Surface and Coatings Technology”, Surface and Coatings Technology, 206, 2308 (2012).

• S. Nag, A. Devaraj, R. Srinivasan, R.E.A. Williams, N. Gupta, G.B. Viswanathan, J.S. Tiley, S.Banerjee, S.G. Srinivasan, H.L. Fraser and R. Banerjee, “Novel mixed- mode phase transition involving a composition-dependent displacive component”, Physical Review Letters, 106(24), 245701 (2011).

• R. P. Singh, S. Nag, J. Y. Hwang, G. B. Viswanathan, J. Tiley, R. Srinivasan, H. L. Fraser, and, R. Banerjee, “Influence of Cooling Rate on the Development of Multiple Generations of g¢ Precipitates in a Commercial Nickel Base Superalloy”, Materials Charac., 62(9), 878 (2011).

• B. Viswanathan, R. Banerjee, A. Singh, S. Nag, J. Tiley, and, H. L. Fraser, “Precipitation of Ordered Phases in Metallic Solid Solutions: A Synergistic Clustering and Ordering Process”, Scripta Met., 65, 485 (2011).

• A. Devaraj, S. Nag, B.C. Muddle, and R. Banerjee “Competing Martensitic, Bainitic, and Pearlitic Transformations in a Hypoeutectoid Ti-5Cu Alloy”, Met and Mat Trans A., 42(5), 1139 (2011).

• H.P. Ng, A. Devaraj, S. Nag, C.J. Bettles, M. Gibson, H.L. Fraser, B.C. Muddle and R. Banerjee, “Phase Separation and Formation of Omega Phase in the Beta Matrix of a Ti-V-Cu Alloy”, Acta Met., 59, 2981 (2011).

• S. R. Paital, N. Bunce, P. Nandwana, C. Honrao, S. Nag, W. He, R. Banerjee and N. B. Dahotre, “Laser Surface Modification for Synthesis of Controlled Textured Bioactive and Biocompatible Ca-P Coatings on Ti-6Al-4V”, Jour. Of Mat. Sc.-Mat. In Med., 22(6), 1393 (2011).

• R. Srinivasan, R. Banerjee, G.B. Viswanathan, S. Nag, J.Y. Hwang, J. Tiley, and H.L. Fraser, “Use of Advanced Characterization Techniques to Study Structural and Compositional Transitions Across Solid State Interfaces”, JOM, 62(12), 64 (2010).

• S. Samuel, S. Nag, S. Nasrazadani, V. Ukirde, M. El Bouanani, A. Mohandas, K. Nguyen, and, R. Banerjee, “Corrosion Resistance and In Vitro Response of Laser- Deposited Ti-Nb-Zr-Ta Alloys for Orthopedic Implant Applications”, Jour. Biomedical Mater. Res., 94A (4), 1251 (2010).

• S. Nag, R. Banerjee, R. Srinivasan, J. Y. Hwang, M. Harper and H. L. Fraser, “Omega Assisted Nucleation and Growth of Alpha Precipitates in the Ti-5Al-5Mo- 5V-3Cr- 0.5Fe Beta Titanium Alloy”, Acta. Met., 57(7), 2136 (2009).

• S. Nag, R. Banerjee, J. Y. Hwang, M. Harper, and H. L. Fraser, “Elemental Partitioning between a and b Phases in the Ti-5Al-5Mo-5V-3Cr-0.5Fe (Ti-5553) Alloy”, Phil. Mag., 89(6), 535 (2009).

• S. Nag, R. Banerjee and H. L. Fraser, “Intra-granular Alpha Precipitation in Ti-Nb- Zr-Ta Biomedical Alloys”, Jour. Mat. Sci., 44(3), 808 (2009).

• S. Nag, S. Samuel, A. Puthucode and R. Banerjee, “Characterization of Novel Borides in Ti-Nb-Zr-Ta + 2B Metal Matrix Composites”, Mater. Charac., 60, 106 (2009).

• S. Nag, K.C. Mahdak, A. Devaraj, S. Gohil, P. Ayyub and R. Banerjee, “Phase Separation in Immiscible Silver-Copper Alloy Thin Films”, Jour. Mat. Sci., 44(13), 3393 (2009).

• A. Devaraj, R. E. A. Williams, S. Nag, R. Srinivasan, H. L. Fraser, and, R. Banerjee, “Three-dimensional Morphology and Composition of Omega Precipitates in a Binary Titanium-Molybdenum Alloy”, Scripta Mat., 61(7), 701 (2009).

• J.Y. Hwang, S. Nag, A.R.P. Singh, R. Srinivasan, J. Tiley, H.L. Fraser, R. Banerjee, “Evolution of the gamma/gamma prime interface width in a commercial nickel base superalloy studied by three-dimensional atom probe tomography”, Scripta Mat., 61(1) 92 (2009).

• J. Y. Hwang, S. Nag, A.R.P. Singh, R. Srinivasan, J. Tiley, G. B. Viswanathan, H. L. Fraser, and R. Banerjee, “Compositional variations between different generations of gamma prime precipitates forming during continuous cooling of a Commercial Nickel- Base Superalloy”, Met and Mat Trans A., 40(13), 3059 (2009).

• S. Samuel, S. Nag, T. Scharf, and R. Banerjee, “Wear Resistance of Laser-Deposited Boride Reinforced Ti-Nb-Zr-Ta Alloy Composites for Orthopedic Implants”, MSE-C, 28(3), 414 (2008).

• S. Nag, R. Banerjee and H.L.Fraser, “A Novel Combinatorial Approach for understanding Microstructural Evolution and its Relationship to Mechanical Properties in Metallic Biomaterials”, Acta Biomat., 3(3), 369 (2007).

• A. Genc, S. Nag, R. Banerjee, A. Puthucode, H.L. Fraser, “3D atom probe tomography and high-resolution electron microscopy of immiscible copper/niobium metallic multilayers”, Microscopy and Microanalysis, 13, 192 (2007).

• R. Banerjee, S. Nag, S. Samuel and H. L. Fraser, “Laser Deposited Ti-Nb-Zr-Ta Orthopedic Alloys”, Jour. of Biomed Mat. Res, 78A (2), 298, (2006).

• S. Nag, R. Banerjee, J. Stechschulte, and H. L. Fraser, “Comparison of microstructural evolution in Ti-Mo-Zr-Fe and Ti-15Mo biocompatible alloys”, Jour. of Mat. Sci.- Mat in medicine, 16 (7), 679 (2005).

• S. Nag, R. Banerjee and H. L. Fraser, “Microstructural evolution and strengthening mechanisms in Ti-Nb-Zr-Ta, Ti-Mo-Zr-Fe and Ti-15Mo biocompatible alloys”, MSE- C, 25(3), 357 (2005).

• R. Banerjee, S. Nag and H. L. Fraser, “A novel combinatorial approach to the development of beta titanium alloys for orthopaedic implants”, MSE-C, 25(3), 282 (2005).

• R. Banerjee, S. Nag, J. Stechschulte, and H. L. Fraser, “Strengthening Mechanisms in Ti-Nb-Zr-Ta and Ti-Mo-Zr-Fe Orthopaedic Alloys”, Biomaterials, 25(17), 3413 (2004).