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Boian Alexandrov

  • Research Associate Professor, Materials Science Engineering
  • 1248 Arthur Adams Dr
    Columbus, OH 43221
  • 614-292-1735

About

Honors

  • 2013

    Warren F. Savage Memorial Award. .

  • 2012

    Lumley Research Award. .

  • 2012

    William Spraragen Memorial Award. .

  • 2011

    2011 Elmer L. Hann Award. .

  • 2010

    Third Place DuBose-Crouse Award for Unique, Unusual, and New Techniques in Microscopy. .

  • 2010

    First Place Award in Scanning Electron Microscopy. .

  • 2003-2004

    Fellowship at the Welding Engineering Program, the Ohio State University. .

  • 2003

    Fellowship at the Institute of Joining and Beam Technology, Otto von Guericke University. .

  • 2001

    Cambridge Colleges Hospitality Scheme, Clare College Scholarship. University of Cambridge.

  • 1994-1998

    Joint European TEMPUS Projects 4019/93 and 9495/95, short term Fellowships. .

  • 1992-1993

    Joint European TEMPUS Project 1877/92. University College.

  • 1989

    Bulgarian Ministry of Education, Scholarship at Section Physical Metallurgy. .

  • 1988

    Bulgarian Ministry of Education, Scholarship at Section Physical Metallurgy. .

Journal Articles

2013

  • Alexandrov,B,T; LIPPOLD,J,C, 2013, "Use of the cast pin tear test to study solidification cracking." WELDING IN THE WORLD 57, no. 5, 635 - 648.
  • Alexandrov,B,T; LIPPOLD,J,C; Sowards,J,W; Hope,A,T; Saltzmann,D,R, 2013, "Fusion boundary microstructure evolution associated with embrittlement of Ni-base alloy overlays applied to carbon steel." WELDING IN THE WORLD 57, no. 1, 39 - 53.

2012

  • Yue,X; LIPPOLD,J,C; Alexandrov,B,T; Babu,S,S, 2012, "Continuous Cooling Transformation Behavior in the CGHAZ of Naval Steels." WELDING JOURNAL 91, no. 3, 67S - 75S.
  • Sowards,Jeffrey,W; Liang,Dong; Alexandrov,Boian,T; Frankel,Gerald,S; Lippold,John,C, 2012, "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, no. 4, 1209 - 1222.
  • Lolla,T; Cola,G; Narayanan,B; Alexandrov,B; Babu,S,S, 2012, "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, no. 1, 126 - 127.

2011

  • Sowards,J,W; Alexandrov,B,T; Lippold,John; Frankel,G,S, 2011, "Weldability of a New Ni-Cu Welding Consumable for Joining Austenitic Stainless Steels." HOT CRACKING PHENOMENA IN WELDS III 393 - 413.
  • T. Lolla, G. Cola, B. Narayanan, B.T. Alexandrov, S.S. Babu, 2011, 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., 2011, "Weldability Studies of High-Cr, Ni-base Filler Metals for Power Generation Applications." Welding in the World 55, no. 3/4, 65 - 76.
  • Sowards J.W., D. Liang, B.T. Alexandrov, G.S Frankel, J.C. Lippold, 2011, "A New Chromium-free Welding Consumable for Joining Austenitic Stainless Steels." Welding Journal 90, 63 - 76.
  • Alexandrov,B,T; Hope,A,T; Sowards,J,W; Lippold,J,C; McCracken,S, 2011, "WELDABILITY STUDIES of HIGH-Cr, Ni-BASE filler metals for power generation applications." WELDING IN THE WORLD 55, no. 3-4, 65 - 76.

2010

  • Liang D., J.W. Sowards, G.S Frankel, B.T. Alexandrov, J.C. Lippold, 2010, "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, 2010, "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, 2007, "Single Sensor Differential Thermal Analysis of Phase Transformations and Structural Changes during Welding and Postweld Heat Treatment." Welding in the World 51, no. 11/12, 48 - 59.

2006

  • Alexandrov B. T. and J. C. Lippold, 2006, "In-Situ Weld Metal Continuous Cooling Transformation Diagrams." Welding in the World 50, no. 9/10, 65 - 74.

2005

  • Alexandrov B. T., K. Theis, M. Streitenberger, H. Herold and I. Martinek, 2005, "Cold Cracking in Weldments of Steel S690 QT." Welding in the World 49, no. 5/6, 64 - 73.

2003

  • Alexandrov B., L. Mraz, 2003, "Applicability of Index for the Microstructural Inhomogeneity of Structural Steels." Journal of Materials Science and Technology 11, no. 1, 56 - 65.
  • Alexandrov B. T., 2003, "Hydrogen Diffusion Coefficient and Modelling of Hydrogen Behavior in Welded Joints of Structural Steels." Welding in the World 47, no. 9/10, 21 - 29.

2002

  • Alexandrov B., E. Ganchovski, and M. Rachim, 2002, "Evaluation of Susceptibility to Cold Cracking during Laser Beam Welding of High Strength Steels." Machine-building Technologies no. 1, 67 - 71.

2000

  • Alexandrov B. and G. Saev, 2000, "Hydrogen Behaviour and Testing Duration by the Methods SIV 19 HT and Implant Test." Machine-building no. 2/3, 31 - 34.

1992

  • Velkov K., and B. T. Alexandrov, 1992, "Device for Investigating the Kinetics of Diffusible Hydrogen Effusion from Welded Joints." Welding Production no. 2, 35 - 37.

1989

  • Alexandrov B. T., 1989, "Procedure and Equipment for Controlled Electrolytic Charging with Hydrogen." Technical Ideas no. 1, 115 - 119.
  • Velkov K., and B. T. Alexandrov, 1989, "Behaviour of Hydrogen in Heat Affected Zone during Welding of Steel 23G2SAF." Wiss. Z. Uniwersitat Rostock 38, no. 7, 50 - 52.

Presentations

  • "New Technique Determines Solid-Liquid and Solid State Phase Transformations during Welding." 2009, Presented at Weld Cracking VII “The Heat Affected Zoneâ€� Conference, AWS, Chicago,
  • "Modeling of Hydrogen Behavior in Welded Joints and Evaluation of its Role for Cold Cracking." 2003, Presented at 7th Seminar Numerical Modeling of Weld Phenomena,, Graz,
  • "Development of a Cr-free Consumable for Joining Austenitic Stainless Steels." 2007, Presented at 5th Charting the Course in Welding: U.S. Shipyards Conference, AWS, Newport News,
  • "Failure Analysis of Weldability Related Defects." 2010, Presented at Symposium Failure Analysis and Prevention, MS&T’10, ASM International, Houston,
  • "Development of a Cast Pin Weldability Test for Ni-base Alloys." 2006, Kokomo,
  • "Single Sensor Differential Thermal Analysis." 2006, Kokomo,
  • "Non-equilibrium Phase diagrams of Advanced Engineering Alloys." 2007, Presented at International Symposium Numerical, Mathematical and Physical Modeling Tools for Materials Processes, MS&T’07, Detroit,
  • "Application of a Novel Tool to Study the Phase Transformations in Welded Joints." 2007, Presented at 3rd International Congress in Industrial Welding Technology, Saltillo, MX|MEX
  • "Single Sensor Differential Thermal Analysis." 2007, Presented at Columbus Chapter Meeting,
  • "Single Sensor DTA: A novel Technique for Studying Phase Transformations in Metals and Alloys." 2006, Kettering,
  • "Hydrogen Induced Cracking in Welded Joints of Structural Steels." 2006, Kettering,
  • "Single Sensor Differential Thermal Analysis." 2007, West Bethesda,

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." in Hot Cracking Phenomena in Welds III. (1 2011). 393 - 413.
  • Alexandrov B.T., J.C. Lippold "Further Development of the Cast Pin Tear Test for Evaluating Solidification Cracking in Ni-base Alloys." in Hot Cracking Phenomena in Welds III. (1 2011). 317 - 331.

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." in Proceedings, Ninth International Conference Welding and Repair Technology for Power Plants IX. (1 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." in Proceedings, SNAME 2010 Maritime Technology Conference. (1 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." in Proceedings, Pressure Vessels & Piping Conference PVP10. (1 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." in Proceedings, Ninth International Conference Welding and Repair Technology for Power Plants IX. (1 2010).
  • Wang L., B.T. Alexandrov, J.C. Lippold "Predicting the Critical Phase Transformation Temperatures in CSEF Steels." in Proceedings, Ninth International Conference Welding and Repair Technology for Power Plants IX. (1 2010).
  • Alexandrov B. T. and J. C. Lippold "In-Situ Determination of Phase Transformations and Structural Changes during Non-equilibrium Material Processing." in In-Situ Studies with Photons, Neutrons and Electrons Scattering. (1 2010). 113 - 131.

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." in First International EPRI Conference. Fort Myers, (6 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." in First International EPRI Conference. Fort Myers, (6 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." in 4th International Brazing and Soldering Conference. (1 2009).

2008

  • Alexandrov B. T., J. C. Lippold, J.K. Tatman, and G.M. Murray "Non-equilibrium Phase Transformation Diagrams in Engineering Alloys." in 8th International Trends in Welding Research Conference. (1 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." in Hot Cracking Phenomena in Welds II. (1 2008). 147 - 170.
  • 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)." in 7th International Symposium on Friction Stir Welding, TWI. Awaji Island, (5 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." in Hot Cracking Phenomena in Welds II. (1 2008). 193 - 214.
  • 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." in Proceedings, 61st IIW International Conference, IIW. Graz, (7 2008). 75 - 80.
  • Alexandrov B. T., J. C. Lippold, J. K. Tatman, and G. M. Murray "Controlling the Microstructure in AHSS Steel Welds." in Sheet Metal Welding Conference, AWS. Livonia,, (5 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." in Proceedings, Stainless Steel World 2007. (1 2007).

2005

  • Alexandrov B. T. and J. C. Lippold "A New Methodology for Studying Phase Transformations in High Strength Steel Weld Metal." in 7th International Trends in Welding Research Conference. (1 2005). 975 - 980.
  • 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." in 4th Stainless Steel World 2005 Conference. Maastricht, (11 2005).

2004

  • Lippold J. C. and B. T. Alexandrov "Phase Transformations during Welding and Post Weld Heat Treatment of Supermartensitic Stainless Steel." in 3rd Stainless Steel World America Conference. Houston, (10 2004). 189 - 200.

2003

  • Alexandrov B. T. "Hydrogen Behaviour in Welded Joints and Evaluation of its Role for Cold Cracking, Part One: State of the Problem." in Mathematical Modeling of Weld Phenomena 7. (1 2003). 781 - 804.
  • Beloev M., F. Hartung, N. Lolov and B. Alexandrov "Influence of Microstructure on Corrosion Resistance of Welded Joints of Duplex Stainless Steels." in Paton International Conference. Kiev, (11 2003).
  • Alexandrov B. T. "Hydrogen Behaviour in Welded Joints and Evaluation of its Role for Cold Cracking, Part Two: Experimental and Modelling Investigations." in Mathematical Modeling of Weld Phenomena 7. (1 2003). 805 - 846.

2002

  • Alexandrov B., M. Lolov, M. Lozanov "Investigation of the Process of Cold Cracking in High Strength Structural Steel by Implant Test." in Int. Congress MEET/MARIND 2002. (10 2002).
  • Alexandrov B. "In-situ CCT Diagrams in HAZ of Low Alloy Structural Steels." in Scientific News of the National Scientific Union on Machine-building. (6 2002). 107 - 113.
  • Alexandrov B., M. Lolov "Study of Weld Bead Formation in Gas Metal Arc Welding." in Int. Congress MEET/MARIND 2002. (10 2002).
  • Saev G., B. Alexandrov, M. Lolov and R. Rachkov "Procedures for Welding and Testing of Bottles for Liquid Gas." in Scientific News of the National Scientific Union on Machine-building. (6 2002). 101 - 106.
  • Alexandrov B. "In-situ Investigation of the Phase Transformations in Ferritic Weld Metal." in Scientific News of the National Scientific Union on Machine-building. (6 2002). 114 - 121.
  • Lolov N., M. Beloev, B. Alexandrov, M. Lozanov "Influence of Cooling Rate on Microstructure and Impact Toughness in HAZ of Steel S355." in 11th International Metallurgy and Materials Congress, Proceedings. Istanbul, (6 2002).

2001

  • Saev G. and B. Alexandrov "Comparison of Methods for Determination of Preheat Temperature in Welding of Low Alloy Structural Steels." in International Conference AMTEX 2001. Sozopol, (10 2001). 210 - 215.

1999

  • Alexandrov B.T., ?. ?ongov and ?. Lozanov "About the Applicability of a Method for Digital Registration of Weld Thermal Cycles." in International Scientific Conference ????CH ’99. TU Plovdiv, (6 1999). 364 - 371.
  • Alexandrov B.T. "Method for In-situ Determination of Phase Transformation Temperatures in Welded Joints." in International Scientific Conference ????CH ’99. Plovdiv, (6 1999). 372 - 379.
  • Shelev Al., ?. ?ongov, B. Alexandrov et al. "Possibilities for Application of Thermal Spray Layers." in International Scientific Conference ????CH ’99. TU Plovdiv, (6 1999). 357 - 363.
  • Shelev Al., N. Lolov, ?. Lozanov, ?. ?ongov and B. Alexandrov "Observation, Recording and Analysis of the Electric Arc Process during Gas Metal Arc Welding." in International Scientific Conference ????CH ’99. TU Plovdiv, (6 1999). 447 - 454.
  • Shelev Al., N. Lolov, St. Christov and B. Alexandrov "Influence of the Production Loss of Quality on the In-service Reliability of Welded joints." in International Conference “Welding on the threshold of XXI Centuryâ€�. Sozopol, (5 1999). 35 - 42.

1997

  • Alexandrov B. and G. Saev "Computer Investigation of Hydrogen Behavior in Weldments." in International Congress "Mechanical Engineering Technologies". Sofia, (9 1997). 136 - 142.

1996

  • Alexandrov B.T. "An Approach for Investigation of the Hydrogen Behavior during Welding." in Development of Metallurgy in the Balkans at the Beginning of the XXI Century. Varna, (5 1996). 343 - 348.

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." in Scientific Conference “50 years Dept. Materials Science and Engineeringâ€�. (1 1995). 2 - 18.
  • Alexandrov B. ?. "Temperature Relationship of Hydrogen Diffusion Coefficient in Welding Conditions." in Scientific Conference “50 years Dept. Materials Science and Engineeringâ€�. TU Sofia, (1 1995). 102 - 111.
  • Alexandrov B. and G. Saev "Designed Computer Investigation of Hydrogen Behaviour in Weldments." in Scientific Conference “?MTECH’95â€�. (1 1995). 225 - 231.

1994

  • Alexandrov B. T. "Procedure for Digital Recording and Analysis of Welding Thermal Cycles." in VII Scientific Session. Sofia, (11 1994). 3 - 9.
  • Alexandrov B. ?., M. Mitev and E. Semov "Equipment for Measurement of Hydrogen in Welded Joints." in V?? Scientific Session. Sofia, (11 1994). 10 - 15.

1989

  • Velkov K., and B. T. Alexandrov "Evaluation of the Influence of Microconstituents’ Content in HAZ on the Hydrogen Diffusivity." in Proceedings of International Conference Welding Processes and Welded Joints. High Tatry, (1 1989). 98 - 100.

Patents

  • Tongov M., S. Serafimov and B. Alexandrov. "Catheter." Patent number: Application, No 102934
  • Velkov K. and B. T. Alexandrov. "Device for measurement of diffusible hydrogen." Patent number: Certificate of Invention, ? 46253/1988
  • Alexandrov B. T. and J. C. Lippold. "Method and Device for Investigation of Phase Transformations in Metals and Alloys." Patent number: 7,473,028
  • Alexandrov B. T. and J. C. Lippold. "Method and Device for Investigation of Phase Transformations in Metals and Alloys." Patent number: 7,909,505