Matthew Bowers
Matthew L. Bowers, Ph.D.
Senior Associate
Materials & Corrosion Engineering
Menlo Park

Dr. Bowers specializes in failure analysis, materials deformation, metallurgy, and materials characterization across multiple length scales from ‘macro’ to ‘nano’. He has extensive experience in mechanical testing, microstructural development, microfabrication, and thin film deposition. He also has expertise in a variety of characterization techniques, including optical microscopy and metallography, scanning electron microscopy (SEM), focused ion beam (FIB), transmission electron microscopy (TEM), and their associated analytical techniques, such as energy dispersive X-ray spectroscopy (EDX) and electron backscatter diffraction (EBSD). Dr. Bowers has particular interest in shape memory and superelastic alloys, microstructural evolution during manufacturing and processing, and fracture and fatigue in medical devices, aerospace, and other industries.

Prior to joining Exponent, Dr. Bowers worked as a postdoctoral fellow at Lawrence Berkeley National Lab, where he studied the thermally and mechanically activated mechanisms of grain boundary migration at the atomic scale. This work included physical vapor deposition (PVD) of metallic films, development of advanced image analysis tools, and dynamic high resolution TEM experiments.

Dr. Bowers completed his Ph.D. research at The Ohio State University in 2014, where he studied the deformation mechanisms and origins of functional fatigue in NiTi-based shape memory alloys (SMAs) as part of a large research effort involving multiple government agencies and industry partners. Throughout the course of his thesis work, he performed bulk and micropillar compression testing, load-biased thermal cycling, and in situ and post mortem SEM/TEM investigations of fatigued SMA microstructures. 

Additionally, Dr. Bowers has served as a teaching assistant for undergraduate materials science courses and has presented his work to audiences at several international conferences.

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Materials Science and Engineering, The Ohio State University, 2014
  • M.S., Materials Science and Engineering, The Ohio State University, 2011
  • B.S., Engineering Physics, John Carrol University, 2009

Publications

Bowers ML, Ophus C, Gautam A, Lancon F, Dahmen U. Step coalescence by collective motion at an incommensurate grain boundary. Physical Review Letters 2016; 116(1):106102.

Bowers ML, Gao Y, Yang L, Gaydosh DJ, De Graef M, Noebe RD, Wang Y, Mills MJ. Austenite grain refinement during load-biased thermal cycling of a Ni49.9 Ti50.1 shape memory alloy. Acta Materialia 2015; 91:318-329.

Kwon J, Bowers ML, Brandes MC, McCreary V, Robertson IM, Sudaharshan Phani P, Bei H, Gao YF, Pharr GM, George EP, Mills MJ. Characterization of dislocation structures and deformation mechanisms in as-grown and deformed directionally solidified NiAl-Mo composites. Acta Materiala 2015; 89:315-326.

Bowers ML, Chen X, De Graef M, Anderson PM, Mills MJ. Characterization and modeling of defects generated in pseudoelastically deformed NiTi microcrystals. Scripta Materialia 2014; 78:69-72.

Presentations

Bowers ML, Gautam A, Ophus C, Lançon F, Dahmen U. Dynamic observation of step nucleation and propagation at grain boundaries. TMS Annual Meeting, Nashville, TN, 2016.

Bowers ML, Gautam A, Ophus C, Lançon F, Dahmen U. Collective atomic motion at a 90° <110> tilt grain boundary in gold. Microscopy and Microanalysis Annual Meeting, Portland, OR, 2015.

Bowers ML, Phillips PJ, Kwon J, Brandes MC, Mills MJ, De Graef M. Zone Axis STEM defect imaging based on electron kossel patterns. Microscopy and Microanalysis Annual Meeting, Hartford, CT, 2014.

Bowers ML, Chen X, Anderson PM, Mills MJ. Characterization and modeling of transformation-induced defects in pseudoelastically-deformed NiTi microcrystals. Shape Memory and Superelastic Technologies (SMST) Annual Meeting, Pacific Grove, CA, 2014.

Bowers ML. Insights into transformation-induced defect generation in NiTi shape memory alloys. Invited seminar, Los Alamos National Laboratory, Los Alamos, NM, 2014.

Bowers ML. Insights into transformation-induced defect generation in NiTi shape memory alloys. Invited seminar, Lawrence Berkeley National Laboratory, Berkeley, CA, 2014.

Bowers ML, Yang L, De Graef M, Anderson PM, Mills MJ. Microstructural evolution in NiTi polycrystals strained by load biased thermal cycling. TMS Annual Meeting, San Diego, CA, 2014.

Bowers ML, Mills MJ, De Graef M. Defect analysis using a segmented STEM detector: Theory and potential applications. TMS Annual Meeting, San Diego, CA, 2014.

Bowers ML, Chen X, Anderson PM, Mills MJ. Characterization of transformation-induced defects in NiTi shape memory alloys. TMS Annual Meeting, San Diego, CA, 2014.

Bowers ML, Chen X, Yang L, Noebe RD, Anderson PM, Mills MJ. Insights into transformation-induced defects in NiTi shape memory alloys. Mechanical Behavior Research Seminar Series, Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, 2013.

Bowers ML, Yang L, T. Nuhfer, De Graef M, and Mills MJ. In-situ and post-mortem observations of microstructural evolution in NiTi polycrystals strained by load-biased thermal cycling. Microscopy and Microanalysis Annual Meeting, Indianapolis, IN, 2013.

Bowers M, Chen X, Anderson PM, Mills MJ. Characterization and modeling of transformation-induced defects in pseudoelastically-deformed NiTi Microcrystals. MRS Fall Meeting, Boston, MA, 2012.

Bowers M, Chen X, Yang L, Manchiraju S, Sarosi P, Noebe RD, Anderson PM, Mills MJ. STEM characterization of defects generated during the martensitic transformation in NiTi shape memory alloys. Microscopy and Microanalysis Annual Meeting, Phoenix, AZ, 2012.

Bowers M, Manchiraju S, Anderson PM, Mills MJ. Characterization of defects generated during the martensitic transformation in pseudoelastically-deformed NiTi microcrystals. TMS Annual Meeting, Orlando, FL, 2012.

Bowers M, Manchiraju S, Uchic M, Sarosi P, Anderson PM, Mills MJ. Characterization of defects generated during the martensitic transformation in pseudoelastically-deformed NiTi microcrystals. MS&T Annual Meeting, Columbus, OH, 2011.

Bowers M, Norlee tD, Uchic M, Manchiraju S, Sarosi P, Anderson PM, Mills MJ. Size effects in the pseudoelastic deformation in NiTi microcrystals. TMS Annual Meeting, San Diego, CA, 2011.

Bowers M, Norleet D, Uchic M, Manchiraju S, Sarosi P, Anderson PM, Mills MJ. Transformation-induced plasticity during pseudoelastic deformation in NiTi microcrystals. MRS Fall Meeting, Boston, MA, 2010.

Professional Affiliations

The Minerals, Metals, and Materials Society—TMS

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Materials Science and Engineering, The Ohio State University, 2014
  • M.S., Materials Science and Engineering, The Ohio State University, 2011
  • B.S., Engineering Physics, John Carrol University, 2009