M. Shehryar Khan, Ph.D.

Banting Postdoctoral Fellow & NSERC Scholar at MIT | Adjunct Assistant Professor at UWaterloo

Contact Information

Department of Mechanical and Mechatronics Engineering

Shehryar photo

University of Waterloo
200 University Avenue West
Waterloo, Ontario N2L 3G1

Phone: (519) 888-4567, x33326

Email:  shehryar.khan@uwaterloo.ca

Biographical Information

Shehryar is an NSERC Scholar who holds a strong academic background in mechanical & mechatronics engineering with a focus on materials science and advanced materials processing used in advanced welding, joining, and additive manufacturing applications. Shehryar has published several research papers in top-ranked international journals and has specialized knowledge in advanced materials characterization, mechanical testing, and failure analysis. He co-developed and co-taught an interdisciplinary undergraduate course on climate change and has mentored high school and undergraduate students from under-served and underrepresented communities. Shehryar is a recipient of the NSERC postgraduate PhD scholarship along with several other notable awards and accolades: Paul Niessen-Teck Award, Nanofellowship Award, and the Engineer of the Future Award. He completed his Honors BASc in Mechanical Engineering (Welding and Joining Specialization) with a Minor in Economics with Distinction at the University of Waterloo. He started his graduate program at CAMJ as a MASc student but was transferred directly to a Ph.D. in 2019.

Read more about Shehryar’s story in a career article (From dropout to PhD) that was recently published in Science Magazine: http://science.org/doi/pdf/10.1126/science.ade4798 


  1. M. Shehryar Khan, Y.N. Zhou, Weld-brazing or welding-brazing: Addressing the inconsistency in the naming convention used for this transformative non-fusion joining technique, Manufacturing Letters, 36 (2023), 10.1016/j.mfglet.2023.02.002
  2. S.S. Ghahfarokhi, M. Shehryar Khan, Y.-H Cho, M.Y. Lee, M.J. Benoit, Y.N. Zhou, The impact of heat input on the microstructural evolution and interfacial morphology of laser- and arc-brazed ZnAlMg coated steel, Journal of Materials Processing Technology, 316 (2023), 10.1016/j.jmatprotec.2023.117943
  3. M. Shehryar Khan, Y-H. Cho, F. Goodwin, Y.N. Zhou, Recent advances in weld-brazing to join thin-gauge alloys used in the automotive industry, Advanced Joining Technologies for Automotive Lightweight Structures, Book Chapter, TMS 2023, 10.1007/978-3-031-22524-6_40
  4. Y.-H. Cho, M. Shehryar Khan, A. Midawi, S. Zhang, F. Goodwin, Y.N. Zhou, Effect of gap clearance on the mechanical properties of weld-brazed lap joints, Manufacturing Letters 35 (2023), https://doi.org/10.1016/j.mfglet.2022.11.002
  5. M. Shehryar Khan, Y.-H. Cho, S. Zhang, F. Goodwin, E. Biro, Y.N. Zhou, The effect of zinc coating type on the morphology, joint geometry, and mechanical properties of Si-Bronze weld-brazed thin-gauge automotive steel, Metallurgical and Materials Transactions A 54 (2023), https://doi.org/10.1007/s11661-022-06857-1
  6. A. Ghatei-Kalashami, M. Shehryar Khan, F. Goodwin, Y.N. Zhou, Investigating zinc-assisted liquid metal embrittlement in ferritic and austenitic steels: Correlation between crack susceptibility and failure mechanism, Materials Characterization 195 (2023) 112502. https://doi.org/10.1016/j.matchar.2022.112502.
  7. M. Shehryar Khan, A. Ghatei-Kalashami, X. Wang, E. Biro, Y.N. Zhou, Refining the hierarchical structure of lath martensitic steel by in situ alloying with nickel: morphology, crystallography, and mechanical properties, Journal of Materials Science (2022), https://doi.org/10.1007/s10853-022-07916-z
  8. J. Cheng, G. Song, Z. Zhang, M. Shehryar Khan, X. Dong, L. Liu, Investigating the multiscale effects of a novel post-weld composite processing treatment on minimizing weld softening in AA6061-T6 Al-alloy, Journal of Materials Research and Technology, (2022), https://doi.org/10.1016/j.jmrt.2022.09.020
  9. M. Shehryar Khan, From dropout to Ph.D., Science, 377 6609 (2022) https://www.science.org/doi/pdf/10.1126/science.ade4798
  10. J. Cheng, G. Song, Z. Zhang, M. Shehryar Khan, Z. Liu, L. Liu, Improving heat-affected zone softening of aluminum alloys by in-situ forced cooling and post-weld rolling, Journal of Materials Processing Technology 117639 (2022) https://doi.org/10.1016/j.jmatprotec.2022.117639
  11. Y-H. Cho, M. Shehryar Khan, F. Goodwin, Y.N. Zhou, Effect of torch angle and position on bead geometry and joint strength during arc brazing of thin-gauge dual-phase steel, International Journal of Advanced Manufacturing Technology (2022). https://doi.org/10.1007/s00170-022-09309-7
  12. A. Ghatei-Kalashami, M. Shehryar Khan, M. Lee, Y.N. Zhou, High-temperature phase evolution of the ZnAlMg coating and its effect on mitigating liquid-metal-embrittlement cracking, Acta Materialia 229 (2022). https://doi.org/10.1016/j.actamat.2022.117836
  13. M. Shehryar Khan, P. Enrique, A. Ghatei-Kalashami, J.G. Lopes, N. Schell, J.P. Oliveira, E. Biro, Y.N. Zhou, (2022), The influence of in-situ alloying of electro-spark deposited coatings on the multiscale morphological and mechanical properties of laser welded Al-Si coated 22MnB5, Materials Science and Engineering: A. 839 (2022). https://doi.org/10.1016/j.msea.2022.142830
  14. M. Shehryar Khan, S. Ali, D. Westerbaan, W. Duley, E. Biro, Y.N. Zhou, The effect of laser impingement angle on the optimization of melt pool geometry to improve process stability during high-speed laser welding of thin-gauge automotive steels, Journal of Manufacturing Processes 78 (2022) 242–253. https://doi.org/10.1016/j.jmapro.2022.04.022
  15. M. Shehryar Khan, Y.-H. Cho, M. Alfano, F. Goodwin, E. Biro, Y.N. Zhou, A systematic study on the effect of coating type and surface preparation on the wettability of Si-Bronze brazing filler material on GI and GA- coated DP600, Surface and Coatings Technology 425 (2021) 127735 https://doi.org/10.1016/j.surfcoat.2021.127735
  16. M. Shehryar Khan, M.H. Razmpoosh, A. Macwan, E. Biro, Y. Zhou, Optimizing weld morphology and mechanical properties of laser welded Al-Si coated 22MnB5 by surface application of colloidal graphite, Journal of Materials Processing Technology 293 (2021) 117093. doi.org/10.1016/j.jmatprotec.2021.117093
  17. Y-H Cho, M. Shehryar Khan, B. Klassen, F. Goodwin, & Y. Zhou, Influence of surface treatment on joint strength during MIG brazing of GI and GA coated DP600. (2021) Sheet Metal Welding Conference XIX.
  18. M. Shehryar Khan, D. Westerbaan, W.W. Duley, E. Biro, & Y.N. Zhou, The Impact of Laser Impingement Angle on Process Stability and Weld Geometry During High-Speed Laser Welding of Automotive Steels. (2021) Sheet Metal Welding Conference XIX.
  19. M. Shehryar Khan, E. Biro, A. Macwan, N.Y. Zhou, α-ferrite Suppression during Fiber Laser Welding of Al- Si Coated 22MnB5 Press-Hardened Steel, Welding Journal (2021). DOI: 10.29391/2021.100.018
  20. M. Shehryar Khan, S.I. Shahabad, M. Yavuz, W.W. Duley, E. Biro, Y. Zhou, Numerical modelling and experimental validation of the effect of laser beam defocusing on process optimization during fiber laser welding of automotive press-hardened steels, Journal of Manufacturing Processes 67 (2021) 535–544. https://doi.org/10.1016/j.jmapro.2021.05.006
  21. M.H. Razmpoosh, M. Shehryar Khan, A. Ghatei Kalashami, A. Macwan, E. Biro, N.Y. Zhou, Effects of laser beam defocusing on high-strain-rate tensile behavior of press-hardened Zn-coated 22MnB5 steel welds, Optics and Laser Technology 141 (2021) 107116. doi.org/10.1016/j.optlastec.2021.107116
  22. M. Shehryar Khan, P. Enrique, G. Song, M.I.S.T. Faria, Y. Zhou, Laser-assisted wire cladding using a retrofitted laser welding system, Surface Engineering 37 (2021) doi.org/10.1080/02670844.2020.1820266
  23. M. Shehryar Khan, M.H. Razmpoosh, E. Biro, Y. Zhou, A review on the laser welding of coated 22MnB5 press-hardened steel and its impact on the production of tailor-welded blanks, Science and Technology of Welding and Joining 25 (2020) 447–467. doi.org/10.1080/13621718.2020.1742472
  24. G. Song, S. Zhao, M. Shehryar Khan, J. Chen, M. Yao, Microscale bonding mechanism of Mg alloy and steel welded joint with nanoscale Al-based intermetallic compound interface layers, Materials Today Communications 26 (2021) 101924. https://doi.org/10.1016/j.mtcomm.2020.101924

Research Interests

  • Process development and optimization for Laser Welding, Laser Brazing, MIG Brazing, and Laser-Arc Hybrid Brazing used in the automotive industry
  • Numerical modelling of 3D laser heat sources to simulate laser welding
  • Physical metallurgy
  • Welding metallurgy
  • Advanced materials characterization (specifically for coated advanced high strength steels and Cu-based brazing alloys) using techniques such as digital image correlation, optical and laser microscopy, image analysis, SEM, EBSD, EPMA, XRD, and TEM.
  • Advanced data processing techniques
  • Alloy design and modelling
  • Phase transformation kinetics
  • Diffusion kinetics
  • Advanced mechanical testing of welded and brazed joints for automotive applications

Thesis Supervisor(s)

  • Professor Norman Zhou
  • Professor Elliot Biro

Teaching Experience and Credentials

  • Course Developer & Instructor – GENE 499 (The Wicked Problem of Climate Change) – University of Waterloo | Fall 2022, Winter 2023 |
  • Completed the Certificate in University Teaching offered by the Center for Teaching Excellence and GSPA (Graduate Certificate)
  • Completed the Fundamentals in University Teaching Program offered by the Center for Teaching Excellence (Diploma)
  • Teaching Assistant – ME 115 (Structure & Properties of Materials) – University of Waterloo | Winter 2019, Spring 2019 |
  • Teaching Assistant – Mech72130 (Dynamics) – Conestoga College | Spring 2018, Spring 2019 |
  • Guest Lectures: ME 115, ME 235, ME 535, ME 735
  • Relevant Courses: Industrial Metallurgy, Welding and Joining, Energy Conversion, Machine Design, Intro to Mechanics, Mechanics of Deformable Solids, Manufacturing Processes, Dynamics, Thermodynamics, Differential Equations, Dynamics of Machines, Heat Transfer, Advanced Calculus, Advanced Engineering Mathematics, Mechanical Engineering Design

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