Materials Scientist
Materials Scientist

Biography

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

Education

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 

Patents

Publications

2025

  • Koch J.V., W. Choi, E. King, D. Garcia, H. Das, T. Wang, and K.A. Ross, et al. 2025. "Neural Lumped Parameter Differential Equations with Application in Friction-Stir Processing." Journal of Intelligent Manufacturing 36, no. 2:1111-1121. PNNL-SA-184214. doi:10.1007/s10845-023-02271-5
  • Li L., D. Garcia, T. Wang, J.D. Escobar, M. Pole, K. Nwe, and D.M. Brown, et al. 2025. "Meshfree simulation and prediction of recrystallized grain size in friction stir processed 316L stainless steel." Journal of Materials Processing Technology 337. PNNL-SA-205212. doi:10.1016/j.jmatprotec.2025.118751

2024

  • Burns C.A., S.J. Livers, S. Meher, A. Mahmud, D. Garcia, P. Meher, and T. Hartmann, et al. 2024. Development Results on Replacement Materials for Current Scarce or High Supply Chain Risk Materials. PNNL-36491. Richland, WA: Pacific Northwest National Laboratory. Development Results on Replacement Materials for Current Scarce or High Supply Chain Risk Materials
  • Garcia D., T. Wang, J.D. Escobar, M. Pole, X. Ma, and K.A. Ross. 2024. "In-situ Measurement and Control of the Tool-Workpiece Interface Temperature during Friction Stir Processing of 304/304L Stainless Steel." Materials Today Communications 38. PNNL-SA-188434. doi:10.1016/j.mtcomm.2023.107672
  • Jin Y., T. Wang, T. Liu, T. Yang, S. Dowden, A. Neogi, and N.B. Dahotre. 2024. "Gradient process parameter optimization in additive friction stir deposition of aluminum alloys." International Journal of Machine Tools and Manufacture 195, no. A:Art. No. 104113. PNNL-SA-193832. doi:10.1016/j.ijmachtools.2023.104113
  • Jin Y., T. Yang, T. Wang, S. Dowden, N.B. Dahotre, and A. Neogi. 2024. "Additive friction stir deposition induced stress ripples in aluminum alloy." The International Journal of Advanced Manufacturing Technology 133, no. 5-6:2435 - 2443. PNNL-SA-199633. doi:10.1007/s00170-024-13900-5
  • Kalsar R., N.R. Overman, J.T. Darsell, J.D. Escobar, L. Li, T. Wang, and X. Ma, et al. 2024. "Material flow behavior and microstructural refinement of AA6061 alloy during friction extrusion." Materials Characterization 208. PNNL-SA-189195. doi:10.1016/j.matchar.2024.113636
  • Nartu M., S. Meher, I.J. van Rooyen, D. Garcia, T. Wang, J. Fernandez dos Santos, and S. Tripathi, et al. 2024. Advanced Manufacturing Techniques and Compositions of High Entropy Alloys for Nuclear Applications. PNNL-36488. Richland, WA: Pacific Northwest National Laboratory. Advanced Manufacturing Techniques and Compositions of High Entropy Alloys for Nuclear Applications
  • Sarvesha R., D. Garcia, T. Dolmetsch, T. Wang, R. Eberheim, V.K. Champagne, and K.A. Ross, et al. 2024. "In-Situ Study on Fracture Behavior of Thick-Section Friction Stir-Welded AA 5083 Alloy." Advanced Engineering Materials 26, no. 9:Art. No. 2301574. PNNL-SA-178490. doi:10.1002/adem.202301574
  • van Rooyen I., S. Meher, P.K. Thallapally, J. Fernandez dos Santos, C.M. Silva, S. Shin, and T. Wang, et al. 2024. Nuclear Energy Critical Material Waste Minimization Enabled by AM Techniques. PNNL-36049. Richland, WA: Pacific Northwest National Laboratory. doi:10.2172/2481591.Nuclear Energy Critical Material Waste Minimization Enabled by AM Techniques
  • van Rooyen I.J., M. Komarasamy, C.M. Silva, T. Ajantiwalay, Q.R. Miller, R. Prabhakaran, and S. Tripathi, et al. 2024. Preliminary Characterization and Evaluation on ShAPE Manufactured 316H and ODS Steels. PNNL-36737. Richland, WA: Pacific Northwest National Laboratory. Preliminary Characterization and Evaluation on ShAPE Manufactured 316H and ODS Steels
  • Wang T., D. Garcia, M. Pole, and K.A. Ross. 2024. "Force Reduction of Friction Stir Welding and Processing of Steel." Materialia 33, no. _:Art. No. 102050. PNNL-SA-188275. doi:10.1016/j.mtla.2024.102050
  • Wang T., D. Garcia, T. Liu, U. Okeke, M. Perry, C.B. Smith, and K.A. Ross. 2024. "Effect of Feed-Rod Tilting on Friction Surfacing of Steel." Surface & Coatings Technology 493, no. Part 2:Art No. 131263. PNNL-SA-197361. doi:10.1016/j.surfcoat.2024.131263
  • Wang T., X. Li, Z. Li, T. Liu, X. Wang, A. Devaraj, and C.A. Powell, et al. 2024. "Upcycled High-Strength Aluminum Alloys from Scrap through Solid-Phase Alloying." Nature Communications 15, no. _:Art No. 10664. PNNL-SA-196125. doi:10.1038/s41467-024-53062-2
  • Wang T., Z. Lu, Q. Zhang, A. Saboo, X. Ma, T. Liu, and Z. Mahbooba, et al. 2024. "High-temperature lean Cu alloys with Cr-to-Nb atomic ratio of 2." Materials Today Communications 39, no. _:Art. No. 108884. PNNL-SA-190640. doi:10.1016/j.mtcomm.2024.108884
  • Wang T., Z. Lu, T. Liu, H. Park, D. Garcia, D. Li, and S.A. Whalen. 2024. Achieving high-ZT in Te/Se-based thermoelectric materials via volume-constrained shear-induced plastic deformation. PNNL-36668. Richland, WA: Pacific Northwest National Laboratory. Achieving high-ZT in Te/Se-based thermoelectric materials via volume-constrained shear-induced plastic deformation
  • Yang T., Y. Jin, T. Wang, S. Dowden, A. Neogi, and N.B. Dahotre. 2024. "Stress interference in multilayer additive friction stir deposition of AA6061 aluminum." The International Journal of Advanced Manufacturing Technology 132, no. 11-12:5385 - 5393. PNNL-SA-198313. doi:10.1007/s00170-024-13688-4

2023

  • Garcia D., T. Wang, S. Rajashekara, T. Dolmetsch, A. Agarwal, and K.A. Ross. 2023. "Investigation of Raster Pattern Spacing and Direction for Friction Stir Additive Manufacturing of Al5083." JOM. The Journal of the Minerals, Metals and Materials Society 75, no. 2023:4223-4230. PNNL-SA-183835. doi:10.1007/s11837-023-06017-9
  • Lama A., S. Rajashekara, D. Garcia, T. Dolmetsch, T. Wang, R. Eberheim, and K.A. Ross, et al. 2023. "Macroscale property assessment and indentation characteristics of thick section friction stir welded Al 5083." Materials Science and Engineering A. Structural Materials: Properties, Microstructure and Processing 880. PNNL-SA-184772. doi:10.1016/j.msea.2023.145306
  • Li X., T. Wang, Y. Ni, P.A. Meyer, J.L. Ramos, and K.L. Simmons. 2023. Shear Assisted Processing and Extrusion (ShAPE) of Plastics: Recycling and Remolding. PNNL-34874. Richland, WA: Pacific Northwest National Laboratory. Shear Assisted Processing and Extrusion (ShAPE) of Plastics: Recycling and Remolding
  • Pole M., Z. Lu, T. Ajantiwalay, M.J. Olszta, S. Tripathi, A. Yu, and H.S. Mehta, et al. 2023. "Modes of Strain Accommodation in Cu-Nb Nanolayered Thin Film on Indentation and Cyclic Shear." Surfaces and Interfaces 37. PNNL-SA-179422. doi:10.1016/j.surfin.2023.102712
  • Reza E Rabby M., H. Das, T. Wang, M. Komarasamy, S.A. Whalen, and G.J. Grant. 2023. "High-Speed Friction Stir Butt Welding of 25.4 mm Thick 7175-T79 Aluminum Alloy." Manufacturing Letters 38. PNNL-SA-184859. doi:10.1016/j.mfglet.2023.08.140
  • van Rooyen I., S. Meher, J. Fernandez dos Santos, M. Komarasamy, M. Nartu, J.B. Wierschke, and R. Prabhakaran, et al. 2023. Feasibility Evaluation of a Solid Phase Scalable HEA Cladding Manufacturing Route. PNNL-35499. Richland, WA: Pacific Northwest National Laboratory. Feasibility Evaluation of a Solid Phase Scalable HEA Cladding Manufacturing Route

2022

  • Jin Y., T. Wang, A. Krokhin, T. Choi, R.S. Mishra, and A. Neogi. 2022. "Ultrasonic Elastography for Nondestructive Evaluation of Dissimilar Material Joints." Journal of Materials Processing Technology 299. PNNL-SA-164793. doi:10.1016/j.jmatprotec.2021.117301
  • Li L., M. Reza E Rabby, N.R. Overman, T. Wang, S.A. Whalen, G.J. Grant, and S.N. Mathaudhu, et al. 2022. "Analysis of contact conditions and microstructure evolution in shear assisted processing and extrusion using smoothed particle hydrodynamics method." Materials & Design 221. PNNL-SA-173428. doi:10.1016/j.matdes.2022.111010
  • Li X., T. Wang, X. Ma, N.R. Overman, S.A. Whalen, D.R. Herling, and K.S. Kappagantula. 2022. "Manufacture aluminum alloy tube from powder with a single-step extrusion via ShAPE." Journal of Manufacturing Processes 80. PNNL-SA-169412. doi:10.1016/j.jmapro.2022.05.060
  • Ma X., E.K. Nickerson, T. Wang, D. Zhang, T. Pelletirers, S.A. Whalen, and X. Li. 2022. "Friction extrusion of ODS copper rod made from powder." Journal of Manufacturing Processes 84. PNNL-SA-174770. doi:10.1016/j.jmapro.2022.10.003
  • Reza E Rabby M., T. Wang, N.L. Canfield, D.D. Graff, T.J. Roosendaal, and S.A. Whalen. 2022. "Effect of post-extrusion heat treatment on mechanical property of aluminum alloy 2024 tube produced using Shear Assisted Processing and Extrusion (ShAPE)." In Light Metals Symposium held at the TMS Annual Meeting and Exhibition (Light Metals 2022), February 27- March 3, 2022, Anaheim, CA, edited by D. Eskin, 301-307. Cham:Springer. PNNL-SA-166238. doi:10.1007/978-3-030-92529-1_42
  • Wang T., S.A. Whalen, X. Ma, J.A. Silverstein, H. Das, M. Pallaka, and A. Ortiz, et al. 2022. "Friction-based riveting technique for AZ31 magnesium alloy." Journal of Magnesium and Alloys 10, no. 1:110 - 118. PNNL-SA-155089. doi:10.1016/j.jma.2021.06.004
  • Wang T., T. Liu, T.J. Roosendaal, and P. Upadhyay. 2022. "Reinforcing the exit hole from friction stir welding and processing." Materialia 26. PNNL-SA-175228. doi:10.1016/j.mtla.2022.101611
  • Wang T., X. Li, B. Gwalani, G.J. Grant, and C.A. Powell. 2022. "Compositionally graded aluminum-silicon alloy fabricated via friction extrusion." Materials Today Communications 33. PNNL-SA-170396. doi:10.1016/j.mtcomm.2022.104423

2021

  • 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

2020

  • 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

2019

  • 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