Dimitry Sediako

Associate Professor

Mechanical, Manufacturing
Other Titles: Mechanical Program Coordinator, Ph.D., FCAE, P.Eng.
Office: EME3225
Phone: 250.807.8714
Email: dimitry.sediako@ubc.ca

Graduate student supervisor



Research Summary

Stress analysis in metal castings, components, and joints; Solidification, phase evolution and transformation; Lightweight alloy development for automotive and aerospace industries; Phase and structural transformation in metals; Material properties - ferrous and lightweight alloys and metal matrix composites; Ferrous and non-ferrous alloys: casting, heat treatment, and forming technologies; Thermal dynamics, heat transfer in metallurgical engineering.

Courses & Teaching

Industrial manufacturing: processes and technologies; Materials science: metals, alloys, and composites; Metallurgy: solidification and thermal processing, phase analysis, stress evolution, process optimization

Biography

After receiving PhD in Metallurgical Engineering in 1987, Dr. Sediako career extended over 30 years of R&D in steel, aluminum, and magnesium metallurgy, including 20 years in industry. In his most recent research at the Canadian Nuclear Laboratories, he has been utilizing unique properties of neutrons, allowing direct stress measurements and phase analysis inside metal parts and components. He collaborates extensively with a number of automotive manufacturers, both OEMs and Tier 1 suppliers, enabling new alloys development, stress analysis, and technology optimization for the most challenging applications. A specific focus of his research is stress characterization in automotive, aerospace, and marine powertrain components, as well as in-situ studies of solidification, phase evolution, and high temperature creep in new aluminum and magnesium alloys’ development for the transportation industries.  Dr. Sediako is an author of more than 200 articles and a licensed Professional Engineer. In 2014 he was inducted into the Fellowship of the Canadian Academy of Engineering.

Degrees

PhD (1987) - Mechanical Engineering / Metallurgical Engineering
Belarussian State Technical University (Belarus) and USSR Research Institute of Metallurgical Thermal Engineering (Russia)

MEng (Honors, Summa Cum Laude) - Industrial Thermal Engineering
Belarussian State Technical University (Belarus)

Research Interests & Projects

PDF – Position available:

Postdoctoral Fellow, starting in January, 2020. Areas: advanced metallography, stress and properties characterization in metal alloys and composites, modeling and simulation (FEA), phase and stress evolution in casting and welding, solid state / friction stir welding. Requirements: prior extensive experience in two or more of the listed fields.

Graduate Students

Areas of Study 

MASc and PhD level

  • Development and characterization of novel high-temperature aluminum and magnesium alloys for automotive and aerospace applications.
  • Stress characterization in aluminum automotive and marine powertrain components. Non-destructive stress analysis and stress mitigation for current and next-generation IC engines and transmissions.
  • FE modeling of phase and stress evolution in metals casting and welding.
  • Solid state / friction stir welding, micro-structure and stress evolution.
  • Advanced fitness-for-service characterization for commercial and novel lightweight alloys and composites.

Selected Publications & Presentations

  1. E. Vandersluis*; A. Elsayed; F. D’Elia; P. Emadi; D. Sediako; C. Ravindran, “Crystalline Phase Solidification Analysis Using In-Situ Neutron Diffraction”, Transactions of the Indian Institute of Metals (TIIM), (2018) 71(11):2777–2781, https://doi.org/10.1007/s12666-018-1418-5
  2. E. Vandersluis*, D. Sediako, P. Emadi*, C. Ravindran, A. Elsayed, G. Byczynski, “Determination of Temperature-Dependent Crystallographic Parameters of Al-Si Alloys Using In-Situ Neutron Diffraction”, Journal of Applied Crystallography, 2018, Vol. 51, pp. 1141-1150
  3. Dimitry Sediako, Joshua Stroh*, Alexandra McDougall*, and Ermia Aghaie*, ”Residual Stress Analysis of A362 Aluminum Alloy Gear Case Using Neutron Diffraction”, Materials Science Forum Online: 2018-12-26, ISSN: 1662-9752, Vol. 941, pp 1288-1294, doi:10.4028/www.scientific.net/MSF.941.1288, © 2018 Trans Tech Publications, Switzerland
  4. J. Stroh, D. Sediako, “Microstructure and In-Situ Solidification Analysis of Al-Ce-Mg Alloy”, Physics in Canada, 2018, (invited)
  5. E. Vandersluis*, D. Sediako, C. Ravindran, A. Elsayed, G. Byczynski, “Analysis of Eutectic Silicon Modification During Solidification of Al-6Si Using In-Situ Neutron Diffraction”, Journal of Alloys and Compounds, 736 (2018), pp. 172-180
  6. E. Vandersluis*, D. Sediako, P. Emadi*, C. Ravindran, A. Elsayed, G. Byczynski, “Determination of Temperature-Dependent Crystallographic Parameters of Al-Si Alloys Using In-Situ Neutron Diffraction”, Journal of Applied Crystallography, 2018, Vol. 51, pp. 1141-1150
  7. S. Fudger*, D. Sediako, P. Karandikar, C. Ni, “Residual Stress Induced Mechanical Property Enhancement in Steel Encapsulated Light Metal Matrix Composites”, Material Science and Engineering A, vol. 699, pp. 10-17, 2017
  8. J. Valloton, D. Herlach, H. Henein, D. Sediako, “Microstructural quantification of rapidly solidified undercooled D2 tool steel”, Materials and Metallurgical Transactions A, October 2017, Vol. 48, Issue 10, pp 4735–4743
  9. A. Lombardi*, D. Sediako, A. Machin, C. Ravindran, R. MacKay, “Effect of solution heat treatment on residual stress in Al alloy engine blocks using neutron diffraction”, Materials Science & Engineering A, Vol. 697, 2017, pp. 238–247
  10. M. Smith*, J.-B. Levesque*, L. Bichler, D. Sediako, J. Gholipour, P. Wanjara, “Residual stress analysis in linear friction welded in-service Inconel 718 superalloy via neutron diffraction and contour method approaches”, Materials Science & Engineering A, Vol. 691, 2017, pp. 168–179
  11. A. Lombardi, E. Vandersluis, D. Sediako, C. Ravindran, “Neutron Diffraction Analysis of Light Alloys: A Review”, Materials Science Forum, Vol. 879, 2017, pp. 1558-1563
  12. A. Lombardi, A. Elsayed, D. Sediako, C. Ravindran, “Analysis of the Solidification Characteristics of a 319 Type Al Alloy using In-situ Neutron Diffraction”, Journal of Alloys and Compounds, Vol. 695 (2017), pp. 2628-2636
  13. M. Smith, L. Bichler, D. Sediako, “Measurement of Residual Stresses in Linear Friction Welded In-Service Inconel 718 Superalloy”, Materials Science Forum, ISSN: 1662-9752, Vol. 879, pp 1800-1806
  14. D. Sediako, W. Kasprzak, F. Czerwinski, A. Nabawy, A. Farkoosh, “High Temperature Creep Evolution In Al-Si Alloys Developed for Automotive Powertrain Applications A Neutron In-Situ Study on hkl-Plane Creep Response”, Light Metals 2016, pp. 131–136
  15. L. Huang, J. Moraes, D. Sediako, J. Jordon , H. Guo, X. Su, “Finite Element and Residual Stress Analysis of Self-piercing Riveting in Dissimilar Metal Sheets”, Journal of Manufacturing Science and Engineering, February 2017, Vol. 139 / pp. 021007 1-11
  16. Ahmad, D. Sediako, A. Lombardi, C. Ravindran, R. MacKay, A.M. Nabawy, “Assessment of Residual Stress in T5 treated 319 Al Alloy Engine Blocks Using Neutron Diffraction”, SAE International Journal of Materials and Manufacturing, SAE Technical Paper 2016-01-0353, 2016, doi:10.4271/2016-01-0353.
  17. Czerwinski, W. Kasprzak, D. Sediako, D. Emadi, S. K. Shaha, J. Friedman, and D.L. Chen, “High Temperature Aluminum Alloys for Automotive Powertrain”, Advanced Materials and Processes, March, 2016, pp. 16-20
  1. A-A. Bogno, U. Dahlborg, M. Calvo-Dahlborg, C. Riveros, N. Ciftci, H. Henein, D. Sediako, “Characterization of a {(Fe60Co40)75B20Si5}96Nb4 Impulse Atomized Glassy Powder by Neutron Diffraction and Differential Scanning  Calorimetry, Elsevier, Journal of Non-Crystalline Solids, 12/2015; 15 January 2016, 432 (2016) 466–470
  1. Sediako, W. Kasprzak, “In-situ Study of Microstructure Evolution in Solidification of Hypereutectic Al-Si Alloys with Application of Thermal Analysis and Neutron Diffraction”, Metallurgical and Materials Transactions A, 2015, Vol. 46A, September, 2015, pp. 4160 – 4173
  2. Lombardi, A., Sediako, D., Machin, A., Ravindran, C., MacKay, R., “Transient Analysis of Residual Strain during Heat Treatment of Multi-material Engine Blocks using In-situ Neutron Diffraction”, Materials Letters, Vol. 157, October, 2015, pp. 50-52
  3. A. Elsayed, D. Sediako & C. Ravindran, “Solidification Behavior of Mg-Zn and Mg-Zn-Zr Alloys Using In-Situ Neutron Diffraction”, Journal of Materials Engineering and Performance, published online April 2, 2015, Volume 24(6), June 2015, pp. 2250-2255
  4. D’Elia, C. Ravindran, D. Sediako. “Interplay Among Solidification, Microstructure, Residual Strain and Hot Tearing in B206 Aluminum Alloy”, Materials Science & Engineering A, 624 (2015), pp.169–180.
  5. A. Lombardi, C. Ravindran, D. Sediako, R. MacKay, “Determining the Mechanism of In-Service Cylinder Distortion in Aluminum Engine Blocks with Cast-in Gray Iron Liners”, Metallurgical and Materials Transactions A, : Volume 45, Issue 13 (2014), Page 6291-6303

Additional Publications

Professional Services/Affiliations/Committees

  • Member (elected), Science Council, The Canadian Institute for Neutron Scattering (CINS). 2016/10 – current

The Canadian Institute for Neutron Scattering (CINS) promotes scientific research using neutron beams. The members include individuals and institutions, totaled 400 individuals from over 40 Canadian institutions from 7 provinces, and over 60 university departments from 32 universities. The membership also includes 150 individuals from over 80 foreign institutions from 19 countries.

 

  • Member (elected), Light Metals Committee, Metallurgical Society (MetSoc) of Canadian Institute of Mining, Metallurgy and Petroleum (CIM). 2012/10 – current

 

  • Fellow (elected), Canadian Academy of Engineering, inducted June 2014

 

 

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