PhD, Mechanical Engineering, Georgia Institute of Technology, 2014 - 2017
MS, Mechanical Engineering, Georgia Institute of Technology, 2008 - 2009
BS, Precision Engineering - Measurement Science and Control Technology, Tsinghua University, 2002 - 2006
Alam, M.J., Zhang, H., & Zhao, X. (2025). Enhancing image processing in single-camera two-wavelength imaging pyrometry for advanced in-situ melt pool measurement in laser powder bed fusion. PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY, 93, 1-17.Elsevier. doi: 10.1016/j.precisioneng.2024.12.013.
Zhang, H., Maier, A., Mathews, M., Hu, J., & Zhao, X. (2025). Development of open-architecture two-wavelength grayscale digital light processing for advanced vat photopolymerization. Additive Manufacturing, 107, 104818.Elsevier. doi: 10.1016/j.addma.2025.104818.
Kolibaba, T.J., Killgore, J.P., Caplins, B.W., Higgins, C.I., Arp, U., Miller, C.C., Poster, D.L., Zong, Y., Broce, S., Wang, T., Talačka, V., Andersson, J., Davenport, A., Panzer, M.A., Tumbleston, J.R., Gonzalez, J.M., Huffstetler, J., Lund, B.R., Billerbeck, K., Clay, A.M., Fratarcangeli, M.R., Qi, H.J., Porcincula, D.H., Bezek, L.B., Kikuta, K., Pearlson, M.N., Walker, D.A., Long, C.J., Hasa, E., Aguirre-Soto, A., Celis-Guzman, A., Backman, D.E., Sridhar, R.L., Cavicchi, K.A., Viereckl, R.J., Tong, E., Hansen, C.J., Shah, D.M., Kinane, C., Pena-Francesch, A., Antonini, C., Chaudhary, R., Muraca, G., Bensouda, Y., Zhang, Y., & Zhao, X. (2024). Results of an interlaboratory study on the working curve in vat photopolymerization. Addit Manuf, 84, 104082.Elsevier. doi: 10.1016/j.addma.2024.104082.
Zhang, H., Zhang, Y., & Zhao, X. (2024). Vat photopolymerization additive manufacturing process modeling: a thermal-chemical coupling approach informed by in-situ and ex-situ characterization data. ADDITIVE MANUFACTURING LETTERS, 9, 100193.Elsevier. doi: 10.1016/j.addlet.2024.100193.
Zhang, Y., Zhang, H., & Zhao, X. (2024). Exploring three-dimensional photoinhibition to enhance vat photopolymerization: A preliminary study. PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY, 90, 176-190.Elsevier. doi: 10.1016/j.precisioneng.2024.08.009.
Vallabh, C.K.P., Zhang, H., Anderson, D.S., To, A.C., & Zhao, X. (2023). Melt Pool Width Measurement in a Multi-Track, Multi-Layer Laser Powder Bed Fusion Print Using Single-Camera Two-Wavelength Imaging Pyrometry. Research Square Platform. doi: 10.21203/rs.3.rs-3672769/v1.
Zhang, H., Vallabh, C.K.P., & Zhao, X. (2023). Influence of Spattering on In-process Layer Surface Roughness during Laser Powder Bed Fusion.
Vallabh, C.K.P., & Zhao, X. (2022). Melt pool temperature measurement and monitoring during laser powder bed fusion based additive manufacturing via single-camera two-wavelength imaging pyrometry (STWIP). Journal of Manufacturing Processes, 79, 486-500.Elsevier. doi: 10.1016/j.jmapro.2022.04.058.
Vallabh, C.K.P., Xiong, Y., & Zhao, X. (2021). 3D printing of liquid metal EGaIn through laser induced forward transfer: A proof-of-concept study. MANUFACTURING LETTERS, 28, 42-45.Elsevier. doi: 10.1016/j.mfglet.2021.03.004.
Zhao, X., To, A., & Neu, R. (2019). An Effective Quality Assurance Method for Additively Manufactured Gas Turbine Metallic Components via Machine Learning from In-Situ Monitoring, Part-scale Modeling, and Ex-Situ Characterization Data. Office of Scientific and Technical Information (OSTI). doi: 10.2172/2335479.
Zhao, X., & Rosen, D.W. (2018). An implementation of real-time feedback control of cured part height in Exposure Controlled Projection Lithography with in-situ interferometric measurement feedback. ADDITIVE MANUFACTURING, 23, 253-263.Elsevier. doi: 10.1016/j.addma.2018.07.016.
Zhao, X., & Rosen, D.W. (2017). Experimental validation and characterization of a real-time metrology system for photopolymerization-based stereolithographic additive manufacturing process. INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, 91(1-4), 1255-1273.Springer Nature. doi: 10.1007/s00170-016-9844-1.
Zhao, X., & Rosen, D.W. (2017). A data mining approach in real-time measurement for polymer additive manufacturing process with exposure controlled projection lithography. JOURNAL OF MANUFACTURING SYSTEMS, 43, 271-286.Elsevier. doi: 10.1016/j.jmsy.2017.01.005.
Zhao, X., & Rosen, D.W. (2017). Real-time interferometric monitoring and measuring of photopolymerization based stereolithographic additive manufacturing process: sensor model and algorithm. Measurement Science and Technology, 28(1), 015001.IOP Publishing. doi: 10.1088/0957-0233/28/1/015001.
Zhao, X., & Rosen, D.W. (2016). Simulation study on evolutionary cycle to cycle time control of exposure controlled projection lithography. Rapid Prototyping Journal, 22(3), 456-464.Emerald. doi: 10.1108/rpj-01-2015-0008.
Zhao, X. (2018). Interferometry sensing data mining for real-time geometric profile measurement in photopolymer based additive manufacturing. International Solid Freeform Fabrication Symposium – an Additive Manufacturing Conference.Austin, TX.
Zhao, X. (2018). Measurements & Sensing Systems: Optical Sensing Technologies. Nanyang Technological University.Singapore.
Zhao, X. (2018). Digital Additive Manufacturing — one paradigm of a holistic approach to advance manufacturing. Nanyang Technological University.Singapore.
Zhao, X. (2018). Towards Digitalized Additive Manufacturing - A Smart Photopolymer based Additive Manufacturing System enabled by Real-time Measurement & Control and assisted by Machine Learning. National University of Singapore.Singapore.
Zhao, X. (2018). An Intelligent Photopolymer Additive Manufacturing System. University of Delaware.Newark, Delaware.
Zhao, X. (2017). Real-time metrology for photopolymer additive manufacturing with exposure controlled projection lithography. ACS (American Chemical Society) National Meeting & Exposition.San Francisco, CA.
Zhao, X. (2017). Engineering Education with and for Digital Additive Manufacturing. Illinois Institute of Technology.Chicago, IL.
Zhao, X. (2017). To advance additive manufacturing - one facilitating pillar: process measurement and control. University of Massachusetts Amherst.
Zhao, X. (2017). To advance manufacturing — one pivotal thruster: precision additive manufacturing. University at Buffalo.Buffalo, NY.
Zhao, X. (2017). A sophisticated approach to improve additive manufacturing process accuracy: real-time measurement and control. University of Michigan - Shanghai Jiao Tong University Joint Institute.Shanghai, China.
Zhao, X., & David, R. (2017). Real-Time Process Measurement and Feedback Control for Exposure Controlled Projection Lithography. International Solid Freeform Fabrication Symposium – an Additive Manufacturing Conference, Austin.
Zhao, X., David, R., Wang, J., Zhao, C., & Jariwala, A. (2016). Experimental Implementation and Investigation of Real-Time Metrology for Exposure Controlled Projection Lithography. International Solid Freeform Fabrication Symposium.Austin, TX.
Zhao, X., & David, R. (2015). Parameter Estimation Based Real-Time Metrology for Exposure Controlled Projection Lithography. International Solid Freeform Fabrication Symposium – an Additive Manufacturing Conference.Austin, TX.
Zhao, X., & Rosen, D.W. (2015). Process Modeling and Advanced Control Methods for Exposure Controlled Projection Lithography**Resrach supported by National Science Foundation. 2015 American Control Conference (ACC).Chicago, IL. doi: 10.1109/acc.2015.7171896.
Zhao, X., & Rosen, D. (2014). Investigation of Advanced Process Control Methods for Exposure Controlled Projection Lithography. International Solid Freeform Fabrication Symposium.Austin, TX.
Zhao, X., David, R., Ding, F., & Jariwala, A. (2009). A Process Planning Method for Thin Film Mask Projection Micro-Stereolithography. ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference.San Diego, CA.