Materials Scientist
Materials Scientist


Tianhao Wang, PhD, is a materials scientist in the Applied Materials and Manufacturing Group at Pacific Northwest National Laboratory. He is an author or co-author on 35 peer-reviewed publications. His current scientific interests focus on solid phase welding and processing techniques including friction stir welding, friction stir processing, and Shear Assisted Processing and Extrusion (ShAPE™).

Research Interest

  • Friction Stir Welding/Processing
  • Shear Assisted Processing and Extrusion (ShAPETM)
  • Dissimilar Materials Joining
  • Structural Materials


PhD, Materials Science and Engineering, University of North Texas

MS, Materials Science and Engineering, Harbin Institute of Technology

BS, Materials Science and Engineering, Harbin Institute of Technology 



  • Das H., P. Upadhyay, T. Wang, B. Gwalani, and X. Ma. 2021. "Interfacial reaction during friction stir assisted scribe welding of immiscible Fe and Mg alloy system." Scientific Reports 11, no. 1:1588. PNNL-SA-155716. doi:10.1038/s41598-021-81266-9
  • Gwalani B., T. Torgerson, S. Dasari, A. Jagetia, M. Nartu, S. Gangireddy, and M. Pole, et al. 2021. "Influence of fine-scale B2 precipitation on dynamic compression and wear properties in hypo-eutectic Al0.5CoCrFeNi high-entropy alloy." Journal of Alloys and Compounds 853. PNNL-SA-154016. doi:10.1016/j.jallcom.2020.157126
  • Wang T., L. Li, M. Pallaka, H. Das, S.A. Whalen, A. Soulami, and P. Upadhyay, et al. 2021. "Mechanical and microstructural characterization of AZ31 magnesium-carbon fiber reinforced polymer joint obtained by friction stir interlocking technique." Materials & Design 198. PNNL-SA-150263. doi:10.1016/j.matdes.2020.109305
  • Wang T., S. Shukla, B. Gwalani, S. Sinha, S. Thapliyal, M. Frank, and R.S. Mishra. 2021. "Co-introduction of precipitate hardening and TRIP in a TWIP high-entropy alloy using friction stir alloying." Scientific Reports 11, no. 1:Article No.1579. PNNL-SA-159159. doi:10.1038/s41598-021-81350-0
  • Whalen S.A., M. Reza E Rabby, T. Wang, X. Ma, T.J. Roosendaal, and B.S. Taysom. 2021. "Shear Assisted Processing and Extrusion of Aluminum Alloy 7075 Tubing at High Speed." In Light Metals held at the TMS Annual Meeting and Exhibition, March 15-18, 2021. Minerals, Metals and Materials Series, edited by L. Perander, 6, 277-280. Cham:Springer. PNNL-SA-156009. doi:10.1007/978-3-030-65396-5_41


  • Sinha S., M. Komarasamy, T. Wang, R. Haridas, P. Agrawal, S. Shukla, and S. Thapliyal, et al. 2020. "Notch-tensile behavior of Al0.1CrFeCoNi high entropy alloy." Materials Science and Engineering. A. Structural Materials: Properties, Microstructure and Processing 774. PNNL-SA-154657. doi:10.1016/j.msea.2020.138918
  • Wang T., D. Ramirez Tamayo, X. Jiang, P. Kitsopoulos, W. Kuang, V. Gupta, and E.I. Barker, et al. 2020. "Effect of interfacial characteristics on magnesium to steel joint obtained using FAST." Materials & Design 192, no. 2020:108697. PNNL-SA-150237. doi:10.1016/j.matdes.2020.108697
  • Wang T., P. Upadhyay, M. Reza E Rabby, X. Li, L. Li, A. Soulami, and K.S. Kappagantula, et al. 2020. "Joining of Thermoset Carbon Fiber Reinforced Polymer and AZ31 Magnesium Alloy Sheet Via Friction Stir Interlocking." International Journal of Advanced Manufacturing Technology 109, no. 3-4:689-698. PNNL-SA-149338. doi:10.1007/s00170-020-05717-9
  • Wang T., S.A. Whalen, P. Upadhyay, and K.S. Kappagantula. 2020. "Joining Dissimilar Materials via Rotational Hammer Riveting Technique." In Magnesium Technology 2020, edited by J. Brian, et al, 207-212. New York, New York:Springer Nature. PNNL-SA-147128. doi:10.1007/978-3-030-36647-6_32


  • Wang T., H. Sidhar, R.S. Mishra, Y. Hovanski, P. Upadhyay, and B. Carlson. 2019. "Evaluation of intermetallic compound layer at aluminum/steel interface joined by friction stir scribe technology." Materials & Design 174. PNNL-SA-142807. doi:10.1016/j.matdes.2019.107795