Photo of Todd Palmer

Todd Palmer

Professor and Director of Center for Innovative Sintered Products

Affiliation(s):

  • Engineering Science and Mechanics
  • Center for Innovative Sintered Products
  • Materials Science and Engineering

147B Research Building West

tap103@psu.edu

814-863-8865

Research Areas:

 
 

 

Education

  • Ph D, Materials Science and Engineering, Pennsylvania State University, 1999

Publications

Journal Articles

  • J. S. Zuback, Todd Palmer and Tarasankar Debroy, 2019, "Additive manufacturing of functionally graded transition joints between ferritic and austenitic alloys", JOURNAL OF ALLOYS AND COMPOUNDS, 770, pp. 995-1003
  • Reginald Felix Hamilton, Beth A. Bimber and Todd Palmer, 2018, "Correlating microstructure and superelasticity of directed energy deposition additive manufactured Ni-rich NiTi alloys", JOURNAL OF ALLOYS AND COMPOUNDS, 739, pp. 712-722
  • S. D. Meredith, J. S. Zuback, J. S. Keist and Todd Palmer, 2018, "Impact of composition on the heat treatment response of additively manufactured 17-4 PH grade stainless steel", MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 738, pp. 44-56
  • Z. R. Khayat and Todd Palmer, 2018, "Impact of iron composition on the properties of an additively Manufactured solid solution strengthened nickel base alloy", MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 718, pp. 123-134
  • Daudi Rigenda Waryoba, J. S. Keist, C. Ranger and Todd Palmer, 2018, "Microtexture in additively manufactured Ti-6Al-4V fabricated using directed energy deposition", MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 734, pp. 149-163
  • G. L. Knapp, T. Mukherjee, J. S. Zuback, H. L. Wei, Todd Palmer, A. De and Tarasankar Debroy, 2017, "Building blocks for a digital twin of additive manufacturing", ACTA MATERIALIA, 135, pp. 390-399
  • Jayme S. Keist and Todd Palmer, 2017, "Development of strength-hardness relationships in additively manufactured titanium alloys", MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 693, pp. 214-224
  • M. F. Gouge, Panagiotis Michaleris and Todd Palmer, 2017, "Fixturing Effects in the Thermal Modeling of Laser Cladding", JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME, 139, (1)
  • B. K. Foster, Allison Beese, J. S. Keist, E. T. Mchale and Todd Palmer, 2017, "Impact of Interlayer Dwell Time on Microstructure and Mechanical Properties of Nickel and Titanium Alloys", METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 48A, (9), pp. 4411-4422
  • D. W. Brown, D. P. Adams, L. Balogh, J. S. Carpenter, B. Clausen, G. King, B. Reedlunn, Todd Palmer, Michael Maguire and S. C. Vogel, 2017, "In Situ Neutron Diffraction Study of the Influence of Microstructure on the Mechanical Response of Additively Manufactured 304L Stainless Steel", METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 48A, (12), pp. 6055-6069
  • Beth A. Bimber, Reginald Felix Hamilton, Jayme Keist and Todd Palmer, 2016, "Anisotropic microstructure and superelasticity of additive manufactured NiTi alloy bulk builds using laser directed energy deposition", MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 674, pp. 125-134
  • Zhuqing Wang, Todd Palmer and Allison Beese, 2016, "Effect of processing parameters on microstructure and tensile properties of austenitic stainless steel 304L made by directed energy deposition additive manufacturing", ACTA MATERIALIA, 110, pp. 226-235
  • Jarred C. Heigel, Pan Michaleris and Todd Palmer, 2016, "Measurement of forced surface convection in directed energy deposition additive manufacturing", PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE, 230, (7), pp. 1295-1308
  • J. J. Blecher, Todd Palmer and Tarasankar Debroy, 2016, "Porosity in Thick Section Alloy 690 Welds - Experiments, Modeling, Mechanism, and Remedy", WELDING JOURNAL, 95, (1), pp. 17S-26S
  • Jayme S. Keist and Todd Palmer, 2016, "Role of geometry on properties of additively manufactured Ti-6Al-4V structures fabricated using laser based directed energy deposition", MATERIALS & DESIGN, 106, pp. 482-494
  • J. C. Heigel, M. F. Gouge, Panagiotis Michaleris and Todd Palmer, 2016, "Selection of powder or wire feedstock material for the laser cladding of Inconel (R) 625", JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 231, pp. 357-365
  • Beth E. Carroll, Todd Palmer and Allison Beese, 2015, "Anisotropic tensile behavior of Ti-6Al-4V components fabricated with directed energy deposition additive manufacturing", ACTA MATERIALIA, 87, pp. 309-320
  • Erik R. Denlinger, Jarred C. Heigel, Pan Michaleris and Todd Palmer, 2015, "Effect of inter-layer dwell time on distortion and residual stress in additive manufacturing of titanium and nickel alloys", JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 215, pp. 123-131
  • Ashwin S. Raghavan, Todd Palmer, Katherine C. Kragh-Buetow, Anna C. Domask, Edward Reutzel, Suzanne E Mohney and Tarasankar Debroy, 2015, "Employing microsecond pulses to form laser-fired contacts in photovoltaic devices", PROGRESS IN PHOTOVOLTAICS, 23, (8), pp. 1025-1036
  • H. L. Wei, J. J. Blecher, Todd Palmer and Tarasankar Debroy, 2015, "Fusion Zone Microstructure and Geometry in Complete-Joint-Penetration Laser-Arc Hybrid Welding of Low-Alloy Steel", WELDING JOURNAL, 94, (4), pp. 135S-144S
  • J. C. Heigel, Panagiotis Michaleris and Todd Palmer, 2015, "In situ monitoring and characterization of distortion during laser cladding of Inconel (R) 625", JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 220, pp. 135-145
  • J. J. Blecher, Todd Palmer and Tarasankar Debroy, 2015, "Mitigation of Root Defect in Laser and Hybrid Laser-Arc Welding", WELDING JOURNAL, 94, (3), pp. 73S-82S
  • Michael F. Gouge, Jarred C. Heigel, Panagiotis Michaleris and Todd Palmer, 2015, "Modeling forced convection in the thermal simulation of laser cladding processes", INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, 79, (1-4), pp. 307-320
  • Reginald Felix Hamilton, Todd Palmer and Beth A. Bimber, 2015, "Spatial characterization of the thermal-induced phase transformation throughout as-deposited additive manufactured NiTi bulk builds", SCRIPTA MATERIALIA, 101, pp. 56-59
  • A. Raghavan, Todd Palmer and Tarasankar Debroy, 2014, "Passivation layer breakdown during laser-fired contact formation for photovoltaic devices", APPLIED PHYSICS LETTERS, 105, (2)
  • J. J. Blecher, C. M. Galbraith, Van Vlack, C., Todd Palmer, J. M. Fraser, Webster, P. J. L. and Tarasankar Debroy, 2014, "Real time monitoring of laser beam welding keyhole depth by laser interferometry", SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 19, (7), pp. 560-564
  • J. J. Blecher, Todd Palmer and Tarasankar Debroy, 2014, "Solidification Map of a Nickel-Base Alloy", METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 45A, (4), pp. 2142-2151
  • Thomas F Lin, Todd Palmer, Kenneth C Meinert, N. R. Murray and R. Majeski, 2013, "Capillary wicking of liquid lithium on laser textured surfaces for plasma facing components", JOURNAL OF NUCLEAR MATERIALS, 433, (1-3), pp. 55-65
  • A. Raghavan, H. L. Wei, Todd Palmer and Tarasankar Debroy, 2013, "Heat transfer and fluid flow in additive manufacturing", JOURNAL OF LASER APPLICATIONS, 25, (5)
  • A. Raghavan, Todd Palmer and Tarasankar Debroy, 2012, "Evolution of laser-fired aluminum-silicon contact geometry in photovoltaic devices", JOURNAL OF APPLIED PHYSICS, 111, (2)
  • J. Blecher, Todd Palmer, S. M. Kelly and Richard Martukanitz, 2012, "Identifying Performance Differences in Transmissive and Reflective Laser Optics Using Beam Diagnostic Tools", WELDING JOURNAL, 91, (7), pp. 204S-214S
  • J. J. Blecher, Todd Palmer and Tarasankar Debroy, 2012, "Laser-silicon interaction for selective emitter formation in photovoltaics. I. Numerical model and validation", JOURNAL OF APPLIED PHYSICS, 112, (11)
  • J. J. Blecher, Todd Palmer, Edward Reutzel and Tarasankar Debroy, 2012, "Laser-silicon interaction for selective emitter formation in photovoltaics. II. Model applications", JOURNAL OF APPLIED PHYSICS, 112, (11)
  • Todd Palmer, J. W. Elmer, P. Mayr and E. D. Specht, 2011, "Direct observation of austenitisation in 1005 C-Mn steel during continuous heating using in situ synchrotron X-ray diffraction", SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 16, (5), pp. 377-384
  • Peter Mayr, Todd Palmer, John W. Elmer and Eliot D. Specht, 2008, "Direct observation of phase transformations in the simulated heat-affected zone of a 9Cr martensitic steel", INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, 99, (4), pp. 381-386
  • Todd Palmer and J. W. Elmer, 2007, "Characterisation of electron beams at different focus settings and work distances in multiple welders using the enhanced modified Faraday cup", SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 12, (2), pp. 161-174
  • J. W. Elmer, Todd Palmer and E. D. Specht, 2007, "Direct observations of sigma phase formation in duplex stainless steels using in-situ synchrotron X-ray diffraction", METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 38A, (3), pp. 464-475
  • R. Rai, J. W. Elmer, Todd Palmer and Tarasankar Debroy, 2007, "Heat transfer and fluid flow during keyhole mode laser welding of tantalum, Ti-6Al-4V, 304L stainless steel and vanadium", JOURNAL OF PHYSICS D-APPLIED PHYSICS, 40, (18), pp. 5753-5766
  • J. W. Elmer, Todd Palmer and E. D. Specht, 2007, "In situ observations of sigma phase dissolution in 2205 duplex stainless steel using synchrotron X-ray diffraction", MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 459, (1-2), pp. 151-155
  • R. G. Thiessen, J. Sietsma, Todd Palmer, J. W. Elmer and I. M. Richardson, 2007, "Phase-field modelling and synchrotron validation of phase transformations in martensitic dual-phase steel", ACTA MATERIALIA, 55, (2), pp. 601-614
  • Todd Palmer, J. W. Elmer, K. D. Nicklas and T. Mustaleski, 2007, "Transferring electron beam welding parameters using the enhanced modified faraday cup", WELDING JOURNAL, 86, (12), pp. 388S-398S
  • Todd Palmer, J. W. Elmer, D. Brasher, D. Butler and R. Riddle, 2006, "Development of an explosive welding process for producing high-strength welds between niobium and 6061-T651 aluminum", WELDING JOURNAL, 85, (11), pp. 252S-263S
  • J. W. Elmer, Todd Palmer and E. D. Specht, 2006, "Direct observations of rapid diffusion of Cu in Au thin films using in situ x-ray diffraction", JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 24, (4), pp. 978-987
  • J. W. Elmer and Todd Palmer, 2006, "In-situ phase mapping and direct observations of phase transformations during arc welding of 1045 steel", METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 37A, (7), pp. 2171-2182
  • TA Palmer and JW Elmer, 2005, "Direct observations of the alpha ->gamma transformation at different input powers in the heat-affected zone of 1045 C-Mn steel arc welds observed by spatially ressolved X-ray diffraction", METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 36A, (12), pp. 3353-3369
  • TA Palmer and JW Elmer, 2005, "Direct observations of the formation and growth of austenite from pearlite and allotriomorphic ferrite in a C-Mn steel arc weld", SCRIPTA MATERIALIA, 53, (5), pp. 535-540
  • JW Elmer, TA Palmer, SS Babu and ED Specht, 2005, "In situ observations of lattice expansion and transformation rates of alpha and beta phases in Ti-6Al-4V", MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 391, (1-2), pp. 104-113
  • JW Elmer, TA Palmer, SS Babu and ED Specht, 2005, "Low temperature relaxation of residual stress in Ti-6Al-4V", SCRIPTA MATERIALIA, 52, (10), pp. 1051-1056
  • Wenyi Zhang, Tarasankar Debroy, TA Palmer and JW Elmer, 2005, "Modeling of ferrite formation in a duplex stainless steel weld considering non-uniform starting microstructure", ACTA MATERIALIA, 53, (16), pp. 4441-4453
  • JW Elmer, TA Palmer, SS Babu, Wenyi Zhang and Tarasankar Debroy, 2004, "Direct observations of austenite, bainite, and martensite formation during arc welding of 1045 steel using time-resolved X-ray diffraction - Phase transformations were tracked in real time using a synchrotron accelerator", WELDING JOURNAL, 83, (9), pp. 244S-253S
  • TA Palmer, JW Elmer and SS Babu, 2004, "Observations of ferrite/austenite transformations in the heat affected zone of 2205 duplex stainless steel spot welds using time resolved X-ray diffraction", MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 374, (1-2), pp. 307-321
  • JW Elmer, TA Palmer, SS Babu, Wenyi Zhang and Tarasankar Debroy, 2004, "Phase transformation dynamics during welding of Ti-6Al-4V", JOURNAL OF APPLIED PHYSICS, 95, (12), pp. 8327-8339
  • JW Elmer, TA Palmer, Wenyi Zhang, B Wood and Tarasankar Debroy, 2003, "Kinetic modeling of phase transformations occurring in the HAZ of C-Mn steel welds based on direct observations", ACTA MATERIALIA, 51, (12), pp. 3333-3349
  • TA Palmer and Tarasankar Debroy, 1998, "Enhanced dissolution of nitrogen during gas tungsten arc welding of steels", SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 3, (4), pp. 190-203

Conference Proceedings

  • J. L. Wise, D. P. Adams, E. E. Nishida, B. Song, Michael Maguire, John M Carroll, B. Reedlunn, J. E. Bishop and Todd Palmer, 2017, "Comparative Shock Response of Additively Manufactured Versus Conventionally Wrought 304L Stainless Steel", SHOCK COMPRESSION OF CONDENSED MATTER - 2015, 1793
  • Jovana Jovanova, Mary I Frecker, Reginald Felix Hamilton and Todd Palmer, 2016, "TARGET SHAPE OPTIMIZATION OF FUNCTIONALLY GRADED SHAPE MEMORY ALLOY COMPLIANT MECHANISM", PROCEEDINGS OF THE ASME CONFERENCE ON SMART MATERIALS, ADAPTIVE STRUCTURES AND INTELLIGENT SYSTEMS, 2016, VOL 2
  • J. J. Blecher, Todd Palmer and S. M. Kelly, 2013, "High Power Laser Characterization Using Beam Diagnostics", TRENDS IN WELDING RESEARCH: PROCEEDINGS OF THE 9TH INTERNATIONAL CONFERENCE, pp. 55-59
  • A. Raghavan, Todd Palmer and Tarasankar Debroy, 2013, "Mathematical Modeling of Laser Micro-Welding for Photovoltaic Devices", TRENDS IN WELDING RESEARCH: PROCEEDINGS OF THE 9TH INTERNATIONAL CONFERENCE, pp. 635-640
  • J. J. Blecher, Todd Palmer and Tarasankar Debroy, 2013, "Mathematical Modeling of the Heat and Mass Transport during Laser Processing of Silicon", TRENDS IN WELDING RESEARCH: PROCEEDINGS OF THE 9TH INTERNATIONAL CONFERENCE, pp. 983-988
  • A. Raghavan, Todd Palmer, A. Domask, Suzanne E Mohney, Edward Reutzel and Tarasankar Debroy, 2013, "Role of processing parameters on morphology, resistance and composition of laser fired contacts", LASER MATERIAL PROCESSING FOR SOLAR ENERGY DEVICES II, 8826
  • A. Raghavan, J. J. Blecher, Todd Palmer, Edward Reutzel and Tarasankar Debroy, 2012, "Modeling of Contact Geometry and Dopant Profile during Laser Silicon Interaction", LASER MATERIAL PROCESSING FOR SOLAR ENERGY, 8473
  • B. D. Ribic, R. Rai, Todd Palmer and Tarasankar Debroy, 2009, "Arc-Laser Interactions and Heat Transfer and Fluid Flow in Hybrid Welding", TRENDS IN WELDING RESEARCH, pp. 313-320
  • S. S. Babu, S. M. Kelly, E. D. Specht, Todd Palmer and J. W. Elmer, 2005, "Measurement of phase transformation kinetics during repeated thermal cycling of Ti-6Al-4V using tjme-resolved X-ray diffraction", Solid-Solid Phase Transformations in Inorganic Material 2005, Vol 2, pp. 503-508
  • SS Babu, JM Vitek, JW Elmer, TA Palmer and SA David, 2004, "Nonequilibrium phase selection during weld solidification of Fe-C-Mn-Al steels", SOLIDIFICATION PROCESSES AND MICROSTRUCTURES, pp. 339-344
  • TA Palmer, JW Elmer, SS Babu and JM Vitek, 2003, "Characterization of low temperature ferrite/austenite transformations in the heat affected zone of 2205 Duplex Stainless Steel arc welds", AUSTENITE FORMATION AND DECOMPOSITION, pp. 177-192
  • TA Palmer, JW Elmer, J Wong, SS Babu and JM Vitek, 2003, "Investigation of the kinetics of the ferrite/austenite phase transformation in the HAZ of a 2205 duplex stainless steel weldment", TRENDS IN WELDING RESEARCH, PROCEEDINGS, pp. 23-28
  • JW Elmer, J Wong, T Ressler and TA Palmer, 2003, "Mapping phase transformations in the heat-affected-zone of carbon manganese steel welds using. spatially resolved x-ray diffraction", TRENDS IN WELDING RESEARCH, PROCEEDINGS, pp. 174-179

Other

  • Todd Palmer, Jens Guenster and Daniel Guenther, 2014, "The Materials Science of Additive Manufacturing Introduction", JOURNAL OF MATERIALS RESEARCH, 29, (17), pp. 1791-1791
  • J. W. Elmer, Todd Palmer, Wenyi Zhang and Tarasankar Debroy, 2008, "Time resolved X-ray diffraction observations of phase transformations in transient arc welds", SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 13, (3), pp. 265-277

Research Projects

Honors and Awards

Service

Service to Penn State:

Service to External Organizations:

 


 

About

The Penn State Department of Engineering Science and Mechanics (ESM) is an internationally distinguished department that is recognized for its globally competitive excellence in engineering and scientific accomplishments, research, and educational leadership.

Our Engineering Science program is the official undergraduate honors program of the College of Engineering, attracting the University’s brightest engineering students. We also offer graduate degrees in ESM, engineering mechanics, engineering at the nano-scale, and an integrated undergraduate/graduate program.

Department of Engineering Science and Mechanics

212 Earth and Engineering Sciences Building

The Pennsylvania State University

University Park, PA 16802

Phone: 814-865-4523