Department of Materials Science and Engineering

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Boian Alexandrov

Research Associate ProfessorMaterials Science Engineering

Edison Joining Technology Ctr
1248 Arthur Adams Dr
Columbus, OH 43221

614-292-1735

Research Area:
Welding / Joining

Honors

2013

  • Warren F. Savage Memorial Award, American Welding Society

2012

  • Lumley Research Award, College of Engineering
  • William Spraragen Memorial Award, American Welding Society

2011

  • 2011 Elmer L. Hann Award, Journal of Ship Production, The Society of Naval Architects and Marine Engineers

2010

  • Third Place DuBose-Crouse Award for Unique, Unusual, and New Techniques in Microscopy, 2010 International Metallographic Contest, ASM International / International Metallographic Society
  • First Place Award in Scanning Electron Microscopy, 2010 International Metallographic Contest, ASM International / International Metallographic Society

2003

  • Fellowship at the Welding Engineering Program, the Ohio State University, NSF-NATO Program for Scientists from NATO Partner Countries
  • Fellowship at the Institute of Joining and Beam Technology, Otto von Guericke University, DAAD (German Academic Exchange Service)

2001

  • Cambridge Colleges Hospitality Scheme, Clare College Scholarship

1994

  • Joint European TEMPUS Projects 4019/93 and 9495/95, short term Fellowships, Institute of Welding and Quality, Lisbon, Portugal

1992

  • Joint European TEMPUS Project 1877/92

1989

  • Bulgarian Ministry of Education, Scholarship at Section Physical Metallurgy, Welding Research Institute

1988

  • Bulgarian Ministry of Education, Scholarship at Section Physical Metallurgy, Welding Research Institute

Journal Articles

2013

  • Alexandrov,B,T; LIPPOLD,J,C; Sowards,J,W; Hope,A,T; Saltzmann,D,R, "Fusion boundary microstructure evolution associated with embrittlement of Ni-base alloy overlays applied to carbon steel." WELDING IN THE WORLD 57 1 39-53
  • Alexandrov,B,T; LIPPOLD,J,C, "Use of the cast pin tear test to study solidification cracking." WELDING IN THE WORLD 57 5 635-648

2012

  • Lolla,T; Cola,G; Narayanan,B; Alexandrov,B; Babu,S,S, "Comment on 'Development of rapid heating and cooling ( flash processing) process to produce advanced high strength steel microstructures' by Lolla et al., with a response from the authors Response." MATERIALS SCIENCE AND TECHNOLOGY 28 1 126-127
  • Sowards,Jeffrey,W; Liang,Dong; Alexandrov,Boian,T; Frankel,Gerald,S; Lippold,John,C, "Solidification Behavior and Weldability of Dissimilar Welds Between a Cr-Free, Ni-Cu Welding Consumable and Type 304L Austenitic Stainless Steel." METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 43A 4 1209-1222
  • Yue,X; LIPPOLD,J,C; Alexandrov,B,T; Babu,S,S, "Continuous Cooling Transformation Behavior in the CGHAZ of Naval Steels." WELDING JOURNAL 91 3 67S-75S

2011

  • Sowards,J,W; Alexandrov,B,T; Lippold,John; Frankel,G,S, "Weldability of a New Ni-Cu Welding Consumable for Joining Austenitic Stainless Steels." HOT CRACKING PHENOMENA IN WELDS III 393-413
  • Alexandrov,B,T; Hope,A,T; Sowards,J,W; Lippold,J,C; McCracken,S, "WELDABILITY STUDIES of HIGH-Cr, Ni-BASE filler metals for power generation applications." WELDING IN THE WORLD 55 3-4 65-76
  • T. Lolla, G. Cola, B. Narayanan, B.T. Alexandrov, S.S. Babu, "Development of rapid heating and cooling (flash processing) process to produce advanced high strength steel microstructures." Materials Science and Technology 27 863-875
  • Alexandrov B.T., Hope A.T., Sowards J.W., Lippold J.C., and McCracken S.S., "Weldability Studies of High-Cr, Ni-base Filler Metals for Power Generation Applications." Welding in the World 55 3/4 65-76
  • Sowards J.W., D. Liang, B.T. Alexandrov, G.S Frankel, J.C. Lippold, "A New Chromium-free Welding Consumable for Joining Austenitic Stainless Steels." Welding Journal 90 63-76

2010

  • Liang D., J.W. Sowards, G.S Frankel, B.T. Alexandrov, J.C. Lippold, "Corrosion Resistance Of Welds In Type 304l Stainless Steel Made With A Nickel-Copper-Ruthenium Welding Consumable." Corrosion Science 52 2439-2451
  • Liang D., J.W. Sowards, G.S Frankel, B.T. Alexandrov, J.C. Lippold, "A corrosion study of nickel-copper and nickel-copper-palladium welding filler metals." Materials and Corrosion 61 909-919

2007

  • Alexandrov B. T. and J. C. Lippold, "Single Sensor Differential Thermal Analysis of Phase Transformations and Structural Changes during Welding and Postweld Heat Treatment." Welding in the World 51 11/12 48-59

2006

  • Alexandrov B. T. and J. C. Lippold, "In-Situ Weld Metal Continuous Cooling Transformation Diagrams." Welding in the World 50 9/10 65-74

2005

  • Alexandrov B. T., K. Theis, M. Streitenberger, H. Herold and I. Martinek, "Cold Cracking in Weldments of Steel S690 QT." Welding in the World 49 5/6 64-73

2003

  • Alexandrov B., L. Mraz, "Applicability of Index for the Microstructural Inhomogeneity of Structural Steels." Journal of Materials Science and Technology 11 1 56-65
  • Alexandrov B. T., "Hydrogen Diffusion Coefficient and Modelling of Hydrogen Behavior in Welded Joints of Structural Steels." Welding in the World 47 9/10 21-29

2002

  • Alexandrov B., E. Ganchovski, and M. Rachim, "Evaluation of Susceptibility to Cold Cracking during Laser Beam Welding of High Strength Steels." Machine-building Technologies 1 67-71

2000

  • Alexandrov B. and G. Saev, "Hydrogen Behaviour and Testing Duration by the Methods SIV 19 HT and Implant Test." Machine-building 2/3 31-34

1992

  • Velkov K., and B. T. Alexandrov, "Device for Investigating the Kinetics of Diffusible Hydrogen Effusion from Welded Joints." Welding Production 2 35-37

1989

  • Velkov K., and B. T. Alexandrov, "Behaviour of Hydrogen in Heat Affected Zone during Welding of Steel 23G2SAF." Wiss. Z. Uniwersitat Rostock 38 7 50-52
  • Alexandrov B. T., "Procedure and Equipment for Controlled Electrolytic Charging with Hydrogen." Technical Ideas 1 115-119

Papers in Proceedings

2011

  • Sowards J.W., B.T. Alexandrov, J.C. Lippold, and G.S. Frankel, "Weldability of a New Ni-Cu Welding Consumable for Joining Austenitic Stainless Steels." Hot Cracking Phenomena in Welds III 2011.
  • Alexandrov B.T., J.C. Lippold, "Further Development of the Cast Pin Tear Test for Evaluating Solidification Cracking in Ni-base Alloys." Hot Cracking Phenomena in Welds III 2011.

2010

  • McCracken S.S., B.T. Alexandrov, A.T. Hope, J.W. Sowards, J.C. Lippold, "Hot Cracking Study of High Chromium Nickel-base Weld Filler Metal 52MSS (ERNiCrFe-13) for Nuclear Applications." Proceedings, Pressure Vessels & Piping Conference PVP10 2010.
  • McCracken S.S., B.T. Alexandrov, A.T. Hope, J.W. Sowards, J.C. Lippold, "Hot Cracking Study of High Chromium Nickel-base Filler Metals." Proceedings, Ninth International Conference Welding and Repair Technology for Power Plants IX 2010.
  • Siefert J.A., B.T. Alexandrov, J.C. Lippold, J.M. Sanders, J.M. Tanzosh, "Weld Metal Phase Transformations during PWHT of Grade 91 Welds." Proceedings, Ninth International Conference Welding and Repair Technology for Power Plants IX 2010.
  • Paulson K.M., J. Wang, N. Topham, C-Y. Wu, B.T. Alexandrov, J.C. Lippold, O. Es-Said, "Alternatives for Joining Stainless Steel to Reduce Cr(VI) Emissions and Occupational Exposures." Proceedings, SNAME 2010 Maritime Technology Conference 2010.
  • Alexandrov B. T. and J. C. Lippold, "In-Situ Determination of Phase Transformations and Structural Changes during Non-equilibrium Material Processing." In-Situ Studies with Photons, Neutrons and Electrons Scattering 2010.
  • Wang L., B.T. Alexandrov, J.C. Lippold, "Predicting the Critical Phase Transformation Temperatures in CSEF Steels." Proceedings, Ninth International Conference Welding and Repair Technology for Power Plants IX 2010.

2009

  • Alexandrov B.T., Hope A.T., Sowards J.W., Lippold J.C., and McCracken S.S., "Susceptibility to Solidification Cracking in High Chromium Nickel-Base Weld Filler Metals, Welding and Fabrication Technology for New Power Plants." First International EPRI Conference 2009.
  • Faith C., Gould E.K., McNeal A.V., Alexandrov B. T., and Shapiro A.E., "Evaluation Of Brazed And Soldered Joints After Thermal Cycling In Liquid Nitrogen." 4th International Brazing and Soldering Conference 2009.
  • Siefert J., B. Alexandrov, J. Lippold, J. Sanders, and J. Tanzosh, "An Update on the Phase Transformations during PWHT of Steel P91, Welding and Fabrication Technology for New Power Plants." First International EPRI Conference 2009.

2008

  • Lippold J.C., J.W. Sowards, G.M. Murray, B.T. Alexandrov, and A.J. Ramirez, "Weld Solidification Cracking in Solid-Solution Strengthened Ni-base Filler Metals." Hot Cracking Phenomena in Welds II 2008.
  • Alexandrov B. T., J. C. Lippold, J. K. Tatman, and G. M. Murray, "Controlling the Microstructure in AHSS Steel Welds." Sheet Metal Welding Conference, AWS 2008.
  • Sinfield, M.F., J.C. Lippold, and B.T. Alexandrov, "Physical Simulation of Friction Stir Weld Microstructure of a High-Strength, Low Alloy Steel (HSLA-65)." 7th International Symposium on Friction Stir Welding, TWI 2008.
  • Alexandrov B. T., J. C. Lippold, J.K. Tatman, and G.M. Murray, "Non-equilibrium Phase Transformation Diagrams in Engineering Alloys." 8th International Trends in Welding Research Conference 2008.
  • Alexandrov B. T., J. C. Lippold, and N. E. Nissley, "Evaluation of Weld Solidification Cracking in Ni-Base Superalloys Using the Cast Pin Tear Test." Hot Cracking Phenomena in Welds II 2008.
  • Siefert J., B. Alexandrov1, J. Lippold, J. Sanders, and J. Tanzosh, "Examination of Phase Transformations during PWHT of Steel P91, Safety and Reliability of Welded Components in Energy and Processing Industry." Proceedings, 61st IIW International Conference, IIW 2008.

2007

  • W. Sowards, J.C. Lippold, B.T. Alexandrov, D. Liang, G.S. Frankel, "Ni-Cu-Pd and Ni-Cu-Ru filler metals for joining austenitic stainless steels." Proceedings, Stainless Steel World 2007 2007.

2005

  • Alexandrov B. T. and J. C. Lippold, "A New Methodology for Studying Phase Transformations in High Strength Steel Weld Metal." 7th International Trends in Welding Research Conference 2005.
  • Lippold J.C., B.T. Alexandrov, M. Gonser, Y.H. Kim, D. Liang, and G.S. Frankel, "Development of Ni-Cu Filler Metals for Joining Austenitic Stainless Steels." 4th Stainless Steel World 2005 Conference 2005.

2004

  • Lippold J. C. and B. T. Alexandrov, "Phase Transformations during Welding and Post Weld Heat Treatment of Supermartensitic Stainless Steel." 3rd Stainless Steel World America Conference 2004.

2003

  • Alexandrov B. T., "Hydrogen Behaviour in Welded Joints and Evaluation of its Role for Cold Cracking, Part Two: Experimental and Modelling Investigations." Mathematical Modeling of Weld Phenomena 7 2003.
  • Alexandrov B. T., "Hydrogen Behaviour in Welded Joints and Evaluation of its Role for Cold Cracking, Part One: State of the Problem." Mathematical Modeling of Weld Phenomena 7 2003.
  • Beloev M., F. Hartung, N. Lolov and B. Alexandrov, "Influence of Microstructure on Corrosion Resistance of Welded Joints of Duplex Stainless Steels." Paton International Conference 2003.

2002

  • Alexandrov B., "In-situ Investigation of the Phase Transformations in Ferritic Weld Metal." Scientific News of the National Scientific Union on Machine-building 2002.
  • Alexandrov B., M. Lolov, M. Lozanov, "Investigation of the Process of Cold Cracking in High Strength Structural Steel by Implant Test." Int. Congress MEET/MARIND 2002 2002.
  • Alexandrov B., M. Lolov, "Study of Weld Bead Formation in Gas Metal Arc Welding." Int. Congress MEET/MARIND 2002 2002.
  • Saev G., B. Alexandrov, M. Lolov and R. Rachkov, "Procedures for Welding and Testing of Bottles for Liquid Gas." Scientific News of the National Scientific Union on Machine-building 2002.
  • Lolov N., M. Beloev, B. Alexandrov, M. Lozanov, "Influence of Cooling Rate on Microstructure and Impact Toughness in HAZ of Steel S355." 11th International Metallurgy and Materials Congress, Proceedings 2002.
  • Alexandrov B., "In-situ CCT Diagrams in HAZ of Low Alloy Structural Steels." Scientific News of the National Scientific Union on Machine-building 2002.

2001

  • Saev G. and B. Alexandrov, "Comparison of Methods for Determination of Preheat Temperature in Welding of Low Alloy Structural Steels." International Conference AMTEX 2001 2001.

1999

  • Shelev Al., N. Lolov, St. Christov and B. Alexandrov, "Influence of the Production Loss of Quality on the In-service Reliability of Welded joints." International Conference “Welding on the threshold of XXI Centuryâ€� 1999.
  • Shelev Al., N. Lolov, ?. Lozanov, ?. ?ongov and B. Alexandrov, "Observation, Recording and Analysis of the Electric Arc Process during Gas Metal Arc Welding." International Scientific Conference ????CH ’99 1999.
  • Shelev Al., ?. ?ongov, B. Alexandrov et al., "Possibilities for Application of Thermal Spray Layers." International Scientific Conference ????CH ’99 1999.
  • Alexandrov B.T., ?. ?ongov and ?. Lozanov, "About the Applicability of a Method for Digital Registration of Weld Thermal Cycles." International Scientific Conference ????CH ’99 1999.
  • Alexandrov B.T., "Method for In-situ Determination of Phase Transformation Temperatures in Welded Joints." International Scientific Conference ????CH ’99 1999.

1997

  • Alexandrov B. and G. Saev, "Computer Investigation of Hydrogen Behavior in Weldments." International Congress "Mechanical Engineering Technologies" 1997.

1996

  • Alexandrov B.T., "An Approach for Investigation of the Hydrogen Behavior during Welding." Development of Metallurgy in the Balkans at the Beginning of the XXI Century 1996.

1995

  • Shelev Al., N. Lolov, S. Serafimov, B. Alexandrov et. al., "Trends and Achievements in the Scientific Research on Welding of Metals at TU Sofia." Scientific Conference “50 years Dept. Materials Science and Engineeringâ€� 1995.
  • Alexandrov B. and G. Saev, "Designed Computer Investigation of Hydrogen Behaviour in Weldments." Scientific Conference “?MTECH’95â€� 1995.
  • Alexandrov B. ?., "Temperature Relationship of Hydrogen Diffusion Coefficient in Welding Conditions." Scientific Conference “50 years Dept. Materials Science and Engineeringâ€� 1995.

1994

  • Alexandrov B. T., "Procedure for Digital Recording and Analysis of Welding Thermal Cycles." VII Scientific Session 1994.
  • Alexandrov B. ?., M. Mitev and E. Semov, "Equipment for Measurement of Hydrogen in Welded Joints." V?? Scientific Session 1994.

1989

  • Velkov K., and B. T. Alexandrov, "Evaluation of the Influence of Microconstituents’ Content in HAZ on the Hydrogen Diffusivity." Proceedings of International Conference Welding Processes and Welded Joints 1989.

Presentations

2010

  • "Failure Analysis of Weldability Related Defects." Symposium Failure Analysis and Prevention, MS&T’10, ASM International. Houston. 2010.

2009

  • "New Technique Determines Solid-Liquid and Solid State Phase Transformations during Welding." Weld Cracking VII “The Heat Affected Zoneâ€� Conference, AWS. Chicago. 2009.

2007

  • "Single Sensor Differential Thermal Analysis." Columbus Chapter Meeting. 2007.
  • "Non-equilibrium Phase diagrams of Advanced Engineering Alloys." International Symposium Numerical, Mathematical and Physical Modeling Tools for Materials Processes, MS&T’07. Detroit. 2007.
  • "Application of a Novel Tool to Study the Phase Transformations in Welded Joints." 3rd International Congress in Industrial Welding Technology. Saltillo. 2007.
  • "Single Sensor Differential Thermal Analysis." West Bethesda. 2007.
  • "Development of a Cr-free Consumable for Joining Austenitic Stainless Steels." 5th Charting the Course in Welding: U.S. Shipyards Conference, AWS. Newport News. 2007.

2006

  • "Single Sensor DTA: A novel Technique for Studying Phase Transformations in Metals and Alloys." Kettering. 2006.
  • "Hydrogen Induced Cracking in Welded Joints of Structural Steels." Kettering. 2006.
  • "Development of a Cast Pin Weldability Test for Ni-base Alloys." Kokomo. 2006.
  • "Single Sensor Differential Thermal Analysis." Kokomo. 2006.

2003

  • "Modeling of Hydrogen Behavior in Welded Joints and Evaluation of its Role for Cold Cracking." 7th Seminar Numerical Modeling of Weld Phenomena,. Graz. 2003.

Patents

1998

  • Tongov M., S. Serafimov and B. Alexandrov. Catheter 102934 Filed Oct 1998

1969

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