Rachel Traylor Sadie

Rachel Traylor Sadie, Ph.D.

Associate
Materials & Corrosion Engineering
Menlo Park
  • CV (English)
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Dr. Traylor’s focus in the sample fabrication, characterization, mechanical testing and failure analysis of metals and metal alloys across multiple length scales. She has extensive experience in various forms of in situ mechanical testing coupled with high-resolution microscopy including transmission electron microscopy (TEM), scanning electron microscopy (SEM), and accompanying analytical techniques, such as energy dispersive X-ray spectroscopy (EDS), electron backscatter diffraction (EBSD), and focused ion beam (FIB) sample preparation and fabrication. Dr. Traylor has particular interest in investigating the mechanical, deformation, and fracture behavior of high-performance structural materials under extreme environmental conditions found in the aerospace, oil and gas, and biomedical industries.

Prior to joining Exponent, Dr. Traylor was a postdoctoral scholar at Stanford University and worked on the development and characterization of a high-throughput process to transform polycrystalline metal structures into oriented single crystals on electronic devices. She further extended this method to generate bi-crystals and triple point grain boundaries for statistical evaluation of grain boundary energetics and fracture behavior in gold. This work included physical vapor deposition (PVD) of metallic films, chemical vapor deposition (CVD) of insulating materials, texture and chemical analyses using EBSD and EDS, respectively, and in situ TEM mechanical testing of gold films.

Dr. Traylor completed her Ph.D. research at the University of California at Berkeley in 2017, where she studied the mechanical and phase transformation behavior of titanium as a function of oxygen and hydrogen content. This work involved mechanical tension and compression testing of different grades of titanium on the macro, micro, and nano scales, which led to impurity investigations in titanium thin films due to the repeated appearance of a novel face-centered cubic (FCC) phase in micro and nano sized samples. Multiple chemical characterization techniques, including EDS, transmission Kikuchi diffraction (TKD), in situ TEM heating, and atom probe tomography (APT) were utilized to confirm the FCC phase was a consequence of oxygen and hydrogen impurities. Additionally, Dr. Traylor served as a teaching assistant for a graduate materials science course in TEM and has presented her work to audiences at several international conferences.

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Materials Science and Engineering, University of California, Berkeley, 2017
  • M.S., Materials Science and Engineering, University of California, Berkeley, 2014
  • B.S., Ceramics and Materials Engineering, Clemson University, 2012

Publications

Traylor R, Zhang R, Kacher J, Douglas JO, Bagot PAJ, Minor AM. Impurity and texture driven hcp-to-fcc transformations in Ti-X thin films during in situ TEM annealing and FIB milling. Acta Materialia 2020; 184(1), p. 199-210.

Zhang R, Zhao S, Ophus C, Deng Y, Vachhani S, Ozdol B, Traylor R, Bustillo K, Morris JW, Chrzan DC, Asta M, Minor AM. Direct imaging of short-range order and its impact on deformation in Ti-6Al. Science Advances 2019; 5(12):eaax2799.

Gan LT, Yang R, Traylor R, Cai W, Nix WD, Fan JA. High-throughput growth of microscale gold bicrystals for single-grain-boundary studies. Advanced Materials 2019; 31(32):1902189.

Zhang R, Traylor R, Pekin T, Ozdol B, Ophus C, Minor AM. Direct observation of SRO effect of Ti-6Al Alloy using energy-filtered TEM and scanning nanobeam electron diffraction. Microscopy and Microanalysis 2018; 24(S1), p. 210-211.

Yu Q, Kacher J, Gammer C, Traylor R, Samanta A, Yang Z, Minor AM. In situ tem observations of fcc Ti formation at elevated temperatures. Scripta Materialia 2017; 140, p. 9-12.

Vo H, Frazer D, Bailey N, Traylor R, Austin J, Pringle J, Bickel J, Connick R, Connick W, Hosemann P. Characterization of a viking blade fabricated by traditional forging techniques. JOM 2016; 68, p. 3174-3179.

Yu Q, Qi L, Tsuru T, Traylor R, Rugg D, Morris JW, Asta M, Chrzan DC, Minor AM. Origin of dramatic oxygen solute strengthening effect in titanium. Science 2015; 347(6222), p. 635-639.

Presentations

Traylor R. FCC Ti. Invited speaker, Gareth Thomas Materials Excellence Award Symposium, Berkeley, CA, 2017.

Traylor R, Zhang R, Kacher J, Minor AM. Investigations into the anomalous fcc structure of alpha-titanium and the hcp to fcc transformation. Poster presentation, International workshop and short course on the frontiers of electron tomography in the physical sciences, Berkeley, CA, 2017.

Traylor R, Zhang R, Kacher J, Minor AM. Investigations into the anomalous fcc structure of alpha-titanium and the hcp to fcc transformation. Poster presentation, Gordon research conference on physical metallurgy, Biddeford, ME, 2017.

Traylor R, Zhang R, Yu Q, Poschmann M, Asta M, Chrzan DC, Minor AM. FCC titanium. Invited speaker, UC Berkeley titanium workshop, Berkeley, CA, 2017.

Traylor R, Zhang R, Yu Q, Kacher J, Poschmann M, Asta M, Chrzan DC, Minor AM. Investigations of face centered cubic titanium. Invited speaker, UC Berkeley workshop on micromechanics and materials behavior - bridging the gaps, Berkeley, CA, 2017.

Traylor R, Kacher J, Poschmann M, Asta M, Chrzan DC, Minor AM. In situ study of oxygen’s influence on deformation twinning in alpha titanium. Conference presentation, TMS 2016 145th annual meeting and exhibition, Nashville, TN, 2016.

Traylor R, Vo H, Frazer D, Connick W, Connick R, Bailey N, Bickel J, Austin J, Hosemann P. The creation of the sword “Berkelium” through authentic saxon sword manufacturing techniques. Invited speaker, UC Berkeley nuclear engineering department colloquium, Berkeley, CA, 2015.

Traylor R, Kacher J, Minor AM. Observation of size-dependent hcp to fcc phase transformation in titanium. Conference presentation, 4th international conference on material modeling, Berkeley, CA, 2015.

Traylor R, Vo H, Frazer D, Connick W, Connick R, Bailey N, Bickel J, Austin J, Hosemann P. Manufacturing a sword from the earth, the viking way. Poster presentation, TMS 2015 144th annual meeting and exhibition, Orlando, FL, 2015.

Traylor R, Gammer C, Yu Q, Olmsted D, Asta M, Minor AM. In situ study of oxygen’s contribution to mechanical strengthening in titanium. Conference presentation, TMS 2015 144th annual meeting and exhibition, Orlando, FL, 2015.

Prior Experience

Postdoctoral Scholar, Stanford University, 2018 - 2019

Coatings Engineer Contractor, General Electric Energy, 2012

Academic Appointments

Postdoctoral Scholar, Electrical Engineering, Stanford University, 2018 - 2019

Graduate Student Researcher, Materials Science and Engineering, University of California Berkeley, 2012 - 2017

Graduate Student Instructor, Materials Science and Engineering, University of California Berkeley, 2013

Student Intern, Materials Science and Engineering, University of California Santa Barbara, 2011

Cooperative Education Student, Ceramics and Materials Engineering, Morgan Advanced Materials - Thermal Ceramics, 2009 - 2010

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Materials Science and Engineering, University of California, Berkeley, 2017
  • M.S., Materials Science and Engineering, University of California, Berkeley, 2014
  • B.S., Ceramics and Materials Engineering, Clemson University, 2012