Dr. Wu’s areas of expertise include failure analysis, metallurgy, fractograhy, material characterization, mechanical testing, and corrosion. At Exponent, her work has focused on the failure analysis of metal and polymer components, solder and solder ball grid array (BGA) related issues, contamination analysis, failure analysis of anodized aluminum, as well as corrosion of materials used in consumer electronics.
Prior to joining Exponent, Dr. Wu was a Principle Materials Engineer at The Timken Company, a major manufacturer of bearing and power transmission systems. She led several research and development projects including optimizing heat treatment process of bearing steels, evaluation of non-metallic inclusions and nano-scale precipitates in steels, as well as microstructure sorting using non-destructive techniques. She also served as a technical service request lead helping internal and external clients with determining root cause of component failures, offering advance material characterization solutions, bearing metallurgy consulting and steel cleanness assessment.
The topic of her dissertation is on the low-temperature gas phase nitriding and nitrocarburizing of stainless steel 316L, where not only enhanced corrosion resistance and improved mechanical properties of SS 316L were achieved by designing and optimizing the surface treatment processes, but also a transition in magnetic properties due to lattice expansion was investigated. She gained extensive hands-on experience during her thesis work, including XRD, SEM/EDS, EBSD, FIB, TEM, AFM/MFM, XPS, and AES.
CREDENTIALS & PROFESSIONAL HONORS
- Ph.D., Materials Science and Engineering, Case Western Reserve University, 2013
- M.S., Materials Science and Engineering, Tsinghua University, 2008
- B.S., Materials Science and Engineering, Tsinghua University, 2005
- Mandarin Chinese
Wu D, Kahn H, Dalton JC, Michal GM, Ernst F, Heuer AH. Orientation dependence of nitrogen supersaturation in austenitic stainless steel during low-temperature gas-phase nitriding. Acta Materialia 2014; 79:339-350.
Wu D, Kahn H, Michal GM, Ernst F, Heuer AH. Ferromagnetism in interstitially hardened austenitic stainless steel induced by low-temperature gas-phase nitriding. Scripta Materialia 2011; 65:1089–1092.
Wu D, Gong WH, Deng HJ, Li M. Magnetoelectric composite ceramics of nickel ferrite and lead zirconate titanate via in situ processing. J. Phys. D 2007; 40:5002–5005.
Wu D, Avishai A, Bedekar V, Hyde S, Heuer AH. Transmission electron diffraction investigation of white etching areas in bearing steels: A comparison between TKD and TEM. Microscopy and Microanalysis, Hartford, CT, August 2014.
Wu D, Kahn H, Michal GM, Ernst F, Heuer AH. Low-temperature gas-phase nitrocarburizing of stainless steel 316L. MS&T 2012, Pittsburgh, PA, October 2012.
Wu D, Kahn H, Michal GM, Ernst F, Heuer AH. Low-temperature gas-phase nitriding of stainless steel 316L. MS&T 2011, Columbus, OH, October 2011.