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Boian Alexandrov

  • Research Associate Professor, Materials Science Engineering
  • Room #128
    1248 Arthur Adams Dr
    Columbus, OH 43221
  • 614-292-1735

Honors

  • 20151101

    Fellow of the American Welding Society.

  • 20131101

    Warren F. Savage Memorial Award.

  • 20121101

    William Spraragen Memorial Award.

  • 20120501

    Lumley Research Award.

  • 20110101

    2011 Elmer L. Hann Award.

  • 20100101

    First Place Award in Scanning Electron Microscopy. College of the Atlantic.

  • 20100101

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

  • 20031001-20040901

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

  • 20030501-20030601

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

  • 20010701-20010801

    Cambridge Colleges Hospitality Scheme, Clare College Scholarship.

  • 19940101-19980101

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

  • 19921001-19930101

    Joint European TEMPUS Project 1877/92.

  • 19891001-19891201

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

  • 19881001-19881101

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

Journal Articles

2016

  • 2016, "Low heat input gas metal arc welding for dissimilar metal weld overlays part I: the heat-affected zone." Welding in the World 60, no. 3,
  • 2016, "Metallurgical characterisations of CMSX-4 vacuumbrazed with BNi-2 and BNi-9." Science and Technology of Welding and Joining DOI: 10.1080/13621718.2016.1218415,

2015

  • 2015, "Crack propagation of Ti alloy via adiabatic shear bands." MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 645,
  • 2015, "Silver-Free Filler Metals Meet Strength Requirements in Brazed Joints." WELDING JOURNAL 94, no. 11,
  • 2015, "Evaluation of New Silver-Free Brazing Filler Metals." WELDING JOURNAL 94, no. 3,

2013

  • Alexandrov,Boian,T; Hope,Adam,T; Sutton,Benjamin,J; Lippold,John,C; Sowards,Jeffrey,W; McCracken,Steven,L, 2013, "Susceptibility to Solidification Cracking in High Chromium Nickel-Base Filler Metals for Nuclear Power Applications." TRENDS IN WELDING RESEARCH: PROCEEDINGS OF THE 9TH INTERNATIONAL CONFERENCE 9, 614-622 - 614-622.
  • 2013, "Use of the cast pin tear test to study solidification cracking." WELDING IN THE WORLD 57, no. 5,
  • 2013, "Fusion boundary microstructure evolution associated with embrittlement of Ni-base alloy overlays applied to carbon steel." WELDING IN THE WORLD 57, no. 1,

2012

  • 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,
  • 2012, "Continuous Cooling Transformation Behavior in the CGHAZ of Naval Steels." WELDING JOURNAL 91, no. 3,
  • 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,
  • 2012, "Phase Transformations In Creep Strength Enhanced Ferritic Steel Welds." Machines, Technologies, Materials 6, no. 4,

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 - 393-413.
  • 2011, Development of rapid heating and cooling (flash processing) process to produce advanced high strength steel microstructures. Materials Science and Technology 27,
  • 2011, "WELDABILITY STUDIES of HIGH-Cr, Ni-BASE filler metals for power generation applications." WELDING IN THE WORLD 55, no. 3-4,
  • 2011, "A New Chromium-free Welding Consumable for Joining Austenitic Stainless Steels." Welding Journal 90,
  • 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 - 65-76.
  • 2011, "Alternatives for Joining Stainless Steel to Reduce Cr(VI) Emissions and Occupational Exposures." JOURNAL OF SHIP PRODUCTION AND DESIGN 27, no. 2,

2010

  • 2010, "Corrosion Resistance Of Welds In Type 304l Stainless Steel Made With A Nickel-Copper-Ruthenium Welding Consumable." Corrosion Science 52,
  • 2010, "A corrosion study of nickel-copper and nickel-copper-palladium welding filler metals." Materials and Corrosion 61,

2007

  • 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,

2006

  • 2006, "In-Situ Weld Metal Continuous Cooling Transformation Diagrams." Welding in the World 50, no. 9/10,

2005

  • 2005, "Cold Cracking in Weldments of Steel S690 QT." Welding in the World 49, no. 5/6,

2003

  • 2003, "Applicability of Index for the Microstructural Inhomogeneity of Structural Steels." Journal of Materials Science and Technology 11, no. 1,
  • 2003, "Hydrogen Diffusion Coefficient and Modelling of Hydrogen Behavior in Welded Joints of Structural Steels." Welding in the World 47, no. 9/10,

2002

  • 2002, "In-situ Investigation of the Phase Transformations in Ferritic Weld Metal." Scientific News 9,
  • 2002, "Welding and Testing of Liquefied Gas Containers." Scientific News 9,
  • 2002, "Evaluation of Susceptibility to Cold Cracking during Laser Beam Welding of High Strength Steels." Machine-building Technologies 51, no. 1,
  • 2002, "In-situ CCT Diagrams in HAZ of Low Alloy Structural Steels." Scientific News 9,

2000

  • 2000, "Hydrogen Behaviour and Testing Duration by the Methods SIV 19 HT and Implant Test." Machine-building 50, no. 2/3,

1992

  • 1992, "Device for Investigating the Kinetics of Diffusible Hydrogen Effusion from Welded Joints." Welding Production 64, no. 2,

1989

  • 1989, "Behaviour of Hydrogen in Heat Affected Zone during Welding of Steel 23G2SAF." Wiss. Z. Uniwersitat Rostock 38, no. 7,
  • 1989, "Procedure and Equipment for Controlled Electrolytic Charging with Hydrogen." Technical Ideas 42, no. 1,

Presentations

  • "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, IIW, TU Graz,
  • "Phase Transformations In Creep Strength Enhanced Ferritic Steel Weld." 2011, Presented at 8th International Congress Machines, Technologies, Materials,
  • "Dissimilar Metal Overlays for Oil and Gas Application." 2015, Presented at AWS Dissimilar Materials Welding / Joining Workshop,
  • "Recent Developments in Weldability Evaluation of Advanced Alloys." 2012, Presented at ASM International Annual Spring Symposium,
  • "Cracking in Weldments of Advanced Alloys." 2016, Presented at AWS Weld Cracking X Conference,
  • "Single Sensor Differential Thermal Analysis." 2007, Presented at Columbus Chapter Meeting,
  • "Application of a Novel Tool to Study the Phase Transformations in Welded Joints." 2007, Presented at 3rd International Congress in Industrial Welding Technology,
  • "Structural Weld Overlays in Nuclear Power Repair." 2015, Presented at Chalmers University of Technology, University West, GKN, Malmo University, Sweden,
  • "Cracking in Weldments of Advanced Alloys." 2016, Presented at Chalmers University of Technology, University West, GKN Sweden,
  • "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,
  • "New Developments in Weldability Evaluation of Advanced Alloys." 2014, Presented at Chalmers University of Technology, University West, Lulea University, GKN Sweden,
  • "Welding of Dissimilar Materials for Oil and Gas, Petrochemical, and Power Generation Industries." 2016, Presented at AWS Welding of Advanced Materials Workshop,
  • "Non-equilibrium Phase diagrams of Advanced Engineering Alloys." 2007, Presented at MS&T’07,
  • "New Technique Determines Solid-Liquid and Solid State Phase Transformations during Welding." 2008, Presented at International North America Offshore Industry Conference, Bohler Welding Group,
  • "New Technique Determines Solid-Liquid and Solid State Phase Transformations during Welding." 2009, Presented at Weld Cracking VII “The Heat Affected Zone” Conference, AWS,
  • "Failure Analysis of Weldability Related Defects." 2010, Presented at Symposium Failure Analysis and Prevention, MS&T’10, ASM International,

Papers in Proceedings

2016

  • He M., B. Alexandrov, and J. Lippold, "Evaluation of the Susceptibility of Duplex Stainless Steel 2205 to Hydrogen Assisted Cracking in REAC System." in PVP'16. (7 2016).
  • "Evaluation of DCB and V-notch fracture mechanics test methods for high temperature brazed joints." in LOT 2015: Brazing, High Temperature Brazing and Diffusion Bonding. (6 2016).
  • Przybylowicz E., Luskin T., Alexandrov B., Lippold J., and McCracken S "Weldability Evaluation of High Chromium, Ni-base Filler Metals Using the Cast Pin Tear Test." in Cracking Phenomena in Welds IV. (1 2016).
  • Bourgeois D., Alexandrov B., Lippold J., and Fenske J. "Metallurgical Factors Influencing the Susceptibility to Hydrogen Assisted Cracking in Dissimilar Metal Welds for Application under Cathodic Protection." in Cracking Phenomena in Welds IV. (1 2016).
  • A. E. Shapiro, B. T. Alexandrov and M. J. Duffey, "Evaluation of new silver-free brazing filler metal in the form of wire or paste." in LOT 2016: Brazing, High Temperature Brazing and Diffusion Bonding. (6 2016).
  • Strader K., Alexandrov B., Lippold J. "Stress-Relief Cracking in Simulated-Coarse-Grained Heat Affected Zone of a Creep-Resistant Steel." in Cracking Phenomena in Welds IV. (1 2016).

2015

  • Duffey M., Marchal J., Loney M., Alexandrov B., and A. Shapiro "Strength of Brazed Joints and Metallurgical Characterization in Cu-4Sn-6P and Cu-40Zn-1Sn-0.3Si Silver-Free Filler Metals." in 6th International Brazing and Soldering Conference. (11 2015).
  • Riggs B., Alexandrov B., Benatar A., Xu R. "Thermodynamic Simulations of Single Crystal Superalloy CMSX-4 Brazed Joints with BNi-2 and BNi-9 Filler Metals." in 6th International Brazing and Soldering Conference. (11 2015).
  • Riggs B., Alexandrov B., Benatar A., Xu R "Microstructural Characterization of Single Crystal Superalloy CMSX-4 Brazed Joints with BNi-2 and BNi-9 Filler Metals." in 6th International Brazing and Soldering Conference. (11 2015).

2013

  • Luskin T.C., B.T. Alexandrov, J.C. Lippold, S.S McCracken "Preliminary Finite Element Analysis and Optimization of the Cast Pin Tear Test, Proceedings." in Numerical Analysis of Weldability X. (2 2013).

2012

  • Alexandrov B.T., J.C. Lippold, T.C. Luskin, A.T. Hope, B. Sutton "An Update on the Weldability of High Chromium Nickel-Base Filler Metals for Nuclear Power Applications." in Welding and Repair Technology for Power Plants X. (6 2012).
  • T.C. Luskin, B.T. Alexandrov, J.C. Lippold, S.S McCracken "Development and Validation of a New Generation Cast Pin Tear Test." in Welding and Repair Technology for Power Plants X. (6 2012).

2011

  • L. Wang, B.T. Alexandrov, J.C. Lippold "New Predictive Formulae for the A1 Temperature in Grade 91 Steel." in Welding and Fabrication Technology for New Power Plants II. (6 2011).
  • Alexandrov B.T., J.W. Sowards, A.T. Hope, B.J. Sutton, J.C. Lippold, S. McCracken "Susceptibility to Solidification Cracking in High Chromium Nickel-Base Weld Alloys." in Welding and Fabrication Technology for New Power Plants II. (6 2011).

2010

  • Wang L., B.T. Alexandrov, J.C. Lippold "Predicting the Critical Phase Transformation Temperatures in CSEF Steels." in Ninth International Conference Welding and Repair Technology for Power Plants IX. (1 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 Ninth International Conference Welding and Repair Technology for Power Plants IX. (1 2010).

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 Welding and Fabrication Technology for New Power Plants I. (6 2009).
  • Alexandrov,B; Lippold,J; Tatman,J; Murray,G "Non-Equilibrium Phase Transformation Diagrams in Engineering Alloys." in 8th International Conference on Trends in Welding Research. (1 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 Welding and Fabrication Technology for New Power Plants I. (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 "Controlling the Microstructure in AHSS Steel Welds." in Sheet Metal Welding Conference VIII, AWS. (5 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)." in 7th International Symposium on Friction Stir Welding, TWI. (5 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." in Proceedings, 61st IIW International Conference, IIW. (7 2008).
  • Alexandrov,B,T; LIPPOLD,J,C; Nissley,N,E "Evaluation of Weld Solidification Cracking in Ni-Base Superalloys Using the Cast Pin Tear Test." in 2nd International Workshop on Hot Cracking Phenomena in Welds. (1 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).

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

  • 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. (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. (10 2004).

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).
  • 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).

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).
  • 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. (6 2002).
  • Alexandrov B., M. Lolov "Study of Weld Bead Formation in Gas Metal Arc Welding." in Int. Congress MEET/MARIND 2002. (10 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).

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. (10 2001).

1999

  • Alexandrov B.T. "Method for In-situ Determination of Phase Transformation Temperatures in Welded Joints." in International Scientific Conference AMTECH ’99. (6 1999).
  • Alexandrov B.T., M. Tongov and M. Lozanov "About the Applicability of a Method for Digital Registration of Weld Thermal Cycles." in International Scientific Conference AMTECH ’99. (6 1999).
  • Shelev Al., M. Tongov, B. Alexandrov "Possibilities for Application of Thermal Spray Layers." in International Scientific Conference AMTECH ’99. (6 1999).
  • Shelev Al., N. Lolov, M. Lozanov, M. Tongov and B. Alexandrov "Observation, Recording and Analysis of the Electric Arc Process during Gas Metal Arc Welding." in International Scientific Conference AMTECH ’99. (6 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." in International Conference “Welding on the threshold of XXI Century”. (5 1999).

1997

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

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. (5 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." in Scientific Conference “50 years Dept. Materials Science and Engineering”. (1 1995).
  • Alexandrov B. ?. "Temperature Relationship of Hydrogen Diffusion Coefficient in Welding Conditions." in Scientific Conference “50 years Dept. Materials Science and Engineering”. (1 1995).
  • Alexandrov B. and G. Saev "Designed Computer Investigation of Hydrogen Behaviour in Weldments." in Scientific Conference “AMTECH’95”. (1 1995).

1994

  • Alexandrov B. T., M. Mitev and E. Semov "Equipment for Measurement of Hydrogen in Welded Joints." in Scientific Session, Higher Military School of Transportation. (11 1994).
  • Alexandrov B. T. "Procedure for Digital Recording and Analysis of Welding Thermal Cycles." in VII Scientific Session. (11 1994).

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. (1 1989).

Patents

  • Velkov K. and B. T. Alexandrov. "Device for measurement of diffusible hydrogen."
  • Tongov M., S. Serafimov and B. Alexandrov. "Catheter."
  • Alexandrov B. T. and J. C. Lippold. "Method and Device for Investigation of Phase Transformations in Metals and Alloys." Patent number: 7,909,505
  • Alexandrov B. T. and J. C. Lippold. "Method and Device for Investigation of Phase Transformations in Metals and Alloys." Patent number: 7,473,028