Jonathan Trenkle
Jonathan C. Trenkle, Ph.D., P.E., CWI
Managing Engineer
Materials & Corrosion Engineering
  • Natick

Dr. Trenkle is a metallurgist specializing in fracture and fatigue, alloy development, process review, welding, and surface engineering, including plating and wear. He leverages this expertise to support product development and engineering design in a variety of industries and applications, such as consumer products, electronic devices, medical devices, energy, and batteries. He also performs detailed failure analyses for litigation and subrogation cases on a range of structures and components including boiler tubes, household and industrial plumbing, HVAC systems, heat exchangers, and micro-electronic components.

Some of Dr. Trenkle’s litigation and subrogation experience includes natural gas pipe and condenser tubing rupture failures, structural failures of aluminum welds in ladders, fatigue and fracture of boiler tubes, stress corrosion cracking of plumbing brass fittings, electrical contact design and failures, electrical wiring and components that have resulted in fires, and cracked solder joints in printed circuit boards. 

Dr. Trenkle’s has supported product development and engineering design for companies ranging in size from start-ups to those listed in the Fortune 500. He regularly provides consulting services for alloy selection and development for structural, chemical, and electrical applications. He uses his expertise in plating and coatings, connector design, and their associated failure mechanisms, such as arcing, wear, fretting, fracture, fatigue and corrosion, to aid in product design, recalls, and vendor selection and auditing. He is also familiar with industry standards used for testing electronic contacts. With regards to welding, he combines his metallurgical expertise with his certification as a welding inspector (AWS CWI) to not only review welding procedures and welder qualifications, but to also provide detailed metallurgical examination of welds. 

Prior to joining Exponent, Dr. Trenkle worked as a process development engineer at Xtalic Corporation where he was responsible for research and development of a new electro-plated metal alloy. He also was a Postdoctoral Associate at Massachusetts Institute of Technology (MIT) where he developed a nanoindenter capable of operating at elevated temperatures in inert atmospheres. As a research associate at Johns Hopkins, he research specialized welding techniques for metallic glasses. Also while at MIT and Johns Hopkins, Dr. Trenkle assisted in teaching undergraduate and graduate courses in mechanical behavior of materials and physical metallurgy.

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Materials Science and Engineering, Johns Hopkins University, 2007
  • M.S., Materials Science and Engineering, Johns Hopkins University, 2005
  • B.S., Materials Science and Engineering, Lehigh University, 2002
  • Postdoctoral Associate, Materials Science and Engineering, Massachusetts Institute of Technology, 2007–2009

LICENSES & CERTIFICATIONS

Licensed Professional Metallurgical Engineer, Massachusetts, #50831 

Certified Welding Inspector, American Welding Society, #13121001

Publications

Rupert TJ, Trenkle JC, Schuh CA. Enhanced solid solution effects on the strength of nanocrystalline alloys. Acta Materialia 2011; 59:1619.

Kelly ST, Trenkle JC, Koerner LJ, Barron SC, Walker N, Pouliquen PO, Tate MW, Gruner SM, Dufresne EM, Weihs TP. Fast x-ray microdiffraction techniques for studying irreversible transformations in materials. Journal of Synchrotron Radiation 2011; 18:464.

Franke O, Trenkle JC, Schuh CA. Temperature dependence of the indentation size effect. Journal of Materials Research 2010; 25:1225.

Trenkle JC, Packard CE, Schuh CA. Hot nanoindention in inert environments. Review of Scientific Instruments 2010; 81:073901.

Packard CE, Trenkle JC, Schuh CA. Nanoindentation: High Temperature. In: Encyclopedia of Materials Science and Technology, Elsevier, pp. 1–6, Oxford, 2010.

Trenkle JC, Koerner LJ, Tate MW, Walker N, Gruner SM, Weihs TP, Hufnagel TC. Time-resolved x-ray microdiffraction studies of phayse transformation during rapidly propagating reactions in Al/Ni and Zr/Ni multilayer foils. Journal of Applied Physics 2010; 107:113511.

Trenkle JC, Koerner LJ, Tate MW, Gruner SM, Weihs TP, Hufnagel TC. Phase transformations during rapid heating of Al/Ni multilayer foils. Applied Physics Letters 2008; 93:081903.

Trenkle JC, Koerner LJ, Tate MW, Gruner SM, Weihs TP, Hufnagel TC. In situ x-ray microdiffraction of phase transformations in rapidly propagating, high-temperature reactions in nanolaminate foils. JANNAF Meeting Proceedings, 2008.

Trenkle JC, Weihs TP, Hufnagel TC. Fracture toughness of bulk metallic glass welds made using nanostructured reactive multilayer foils. Scripta Materialia 2008; 58:315.

Trenkle JC, Wang J, Weihs TP, Hufnagel TC. Microstructural study of an oscillatory formation reaction in nanostructured reactive multilayer foils. Applied Physics Letters 2005; 87:153108.

Presentations

Trenkle JC. Microscale metallography using focused ion beam. Microscopy & Microanalysis (M&M), Hartford, CT, 2014.

Budiansky N, Trenkle JC, Verghese P. Evaluating the role of thread compounds in brass stress corrosion cracking. Materials Science & Technology (MS&T), Pittsburgh, PA, 2014.

Budiansky N, Trenkle JC, Verghese P. Detection and analysis of sub-surface corrosion by computed X-ray tomography (CT). Materials Science & Technology (MS&T), Pittsburgh, PA, 2014.

Trenkle JC, Packard CP, Schuh CA. Optimizing the performance of high temperature nanoindention in inert atmospheres. Materials Research Society Fall Meeting, Boston, MA, 2008.

Trenkle JC, Koerner L, Tate MW, Gruner S, Weihs TP, Hufnagel TC. In situ x-ray microdiffraction temporal resolution of phase transformations in rapidly propogating exothermic reactions in nanoscale multilayers. Materials Research Society Fall Meeting, Boston, MA, 2008.

Trenkle JC, Koerner L, Tate MW, Gruner S, Weihs TP, Hufnagel TC. In situ x-ray microdiffraction of phase transformations in rapidly propagating, high-temperature reactions in nanolaminate foils. Oral presentation, JANNAF Meeting, Newton, MA, 2008.

Trenkle JC, Koerner L, Tate MW, Gruner S, Weihs TP, Hufnagel TC. Real-time X-ray diffraction studies of phase transformations during rapidly propagating reactions in nanolaminate foils. Oral presentation, Materials Research Society Fall Meeting, Boston, MA, 2007.

Trenkle JC. Joining metallic glasses using nanostructured reactive multilayer foils. Invited talk, NIST Center for Neutron Research, Gaithersburg, MD, 2007.

Trenkle JC, Koerner L, Nathani H, Tate MW, Gruner S, Weihs TP, Hufnagel TC. Real-time in situ X-ray diffraction of self-propagating exothermic reactions in nanostructured reactive mulitlayer foils. Oral presentation, Materials Research Society Fall Meeting, Boston, MA, 2006.

Trenkle JC, Koerner L, Tate MW, Gruner S, Weihs TP, Hufnagel TC. In situ X-ray diffraction of phase transformations in nanostructured reactive multilayer foils. Oral poster, Synchrotron Radiation in Materials Science-5, Chicago, IL, 2006.

Hufnagel TC, Trenkle JC, Swiston, Jr, AJ, Weihs TP. Welding metallic glass with reactive multilayer foils. Invited talk presented by J.C. Trenkle, The First International Conference on Mechanics and Mechanical Properties of Non-crystalline Materials I: Amorphous Metals, Beijing, China, 2006.

Trenkle JC, Swiston, Jr., AJ, Knio OM, Besnoin E, Duckham A, Weihs TP, Hufnagel TC. Joining metallic glass using reactive multilayer foils. Oral presentation, Johns Hopkins Materials Science Research Symposium, Baltimore, MD, 2005.

Trenkle JC, Wang J, Knio OM, Besnoin E, Weihs TP, Hufnagel TC. Producing amorphous joints in metallic glasses by reactive joining. Oral presentation, The Minerals, Metals & Materials Society Annual Meeting, San Francisco, CA, 2005.

Duckham A, Trenkle JC, Swiston, Jr., AJ, Knio OM, Besnoin E, Hufnagel TC, Weihs TP. Amorphous product formation by self-propagating reactions in multilayered foils. Oral presentation, Materials Research Society Fall Meeting, Boston, MA, 2003.

Patents

US Patent No. 8,445,116 B2: Coated Articles and Methods, May 21, 2013 (Dadvand N, Schuh CA, Lund AC, Trenkle JC, Cahalen J).

Prior Experience

Process Development Engineer, Xtalic Corporation, 2009–2011

Postdoctoral Associate, Massachusetts Institute of Technology, 2007–2009

Graduate Research Assistant, John Hopkins University, 2002–2007

Professional Affiliations

ASM International

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Materials Science and Engineering, Johns Hopkins University, 2007
  • M.S., Materials Science and Engineering, Johns Hopkins University, 2005
  • B.S., Materials Science and Engineering, Lehigh University, 2002
  • Postdoctoral Associate, Materials Science and Engineering, Massachusetts Institute of Technology, 2007–2009

LICENSES & CERTIFICATIONS

Licensed Professional Metallurgical Engineer, Massachusetts, #50831 

Certified Welding Inspector, American Welding Society, #13121001