Wendy Matthews Email and Phone Number

Gas Turbine / Turbomachinery Materials SpecialistMaterials Research, Characterization & SelectionOxidation / Corrosion / Creep / Fatigue AnalysisComponent Life Prediction & Failure AnalysisTechnical Reports / Papers & Presentations

• Failure Analysis of rotating and static turbocharger components; Fracture surface analysis to determine failure mode (fatigue, creep, etc.); SEM/EDS analysis

Volunteer and Elected Positions:Chair – Microturbines, Turbochargers & Small Turbomachines Committee (07/2011 – 07/2013)• Elected Position involving acting as a Point Contact for the Turbo Expo Conference; reviewing and accepting/rejecting abstracts; creating sessions and assigning papers to sessions; coordinating session organizers and authors; and reviewing papers for publication in conference proceedings.Vice-Chair – Microturbines & Small Turbomachinery Committee (07/2009 – 07/2011)• Elected position with responsibilities similar to that of Chair.Voluntary Participation in Microturbines & Small Turbomachinery Committee (09/2004 – Present)• Participated in Turbo Expo Conferences and the M&ST Committee of IGTI as an author, reviewer, session organizer, and session chair with increasing responsibility leading to election as an officer of the M&ST Committee.

• Key member of various DOE sponsored programs including the “Advanced Microturbine System” (AMTS) which led to the development and commercialization of the Capstone C200 microturbine; the “High Efficiency Microturbine with Integral Heat Recovery” (CHP Program); “Alumina-Forming-Austenitic (AFA) Stainless Steels”. • Responsible for all materials selection to meet the requirements of the AMTS Program.• Planned, scheduled and organized a materials development program leading to the design of a dual-alloy Transient Liquid Phase (TLP) bonded radial turbine wheel consisting of single crystal alloy blades bonded to an equiaxed alloy hub for the CHP Program; this program involved collaboration and coordination with personnel from Oak Ridge National Laboratory and various commercial alloy production, casting and brazing facilities.• Responsible for all test plans to evaluate the AFA Alloy for use in microturbine thin foil primary surface recuperators; instrumental in the initial test stages of the AFA alloy.• Performed extensive characterization of oxidation of thin foil stainless steel and nickel alloys for gas turbine primary surface recuperators, including microprobe characterization to develop life estimates, through extensive collaboration with personnel at the High Temperature Materials Laboratory (HTML) of ORNL.• Completed characterization of the effects of Bio-diesel containing high levels of Sodium on microturbine hot section components in collaboration with personnel at ORNL as part of the HTML user program.• Executed failure analyses on gas turbine components including destructive and non-destructive analyses and microscopic preparation and examination.• Supported all facets of the production process.• Carried out data reduction to obtain material property design curves from raw test data; built and maintained the materials database and laboratory.

Sr. Stress Engineer, Turbine Structures (11/1996 – 6/2000)• Performed turbine blade and disc mission, overspeed, overtemperature, 2D & 3D stress, crack growth, and heat transfer analyses, using commercial and in-house software packages.• Made component life predictions based on creep, LCF, HCF and oxidation analyses.• Responsible for the complete material characterization of two new turbine blade single crystal alloys including; research, test planning, scheduling, budgeting, cost tracking, test facility calibration, and data reduction for the development of design curves. “New Grad” Familiarization Program (5/1995 – 11/1996)• Test Section Design Engineer (Designed engine modifications for a torqueshaft straingauge test; Preliminary design of a carbon seal test rig). • Stress Engineer (Developed an LCF life prediction tool for static components in the gas turbine hot section; Created and maintained a material database for use with the LCF life prediction tool). • Test Cell Engineer (Turboprop and Turboshaft Engines - Performed block tests, mission simulations, special tests; Programmed engine operating conditions using the VAX system; Analyzed test cell data).• Test Engineer (Straingauge Laboratory and Test Data Reduction - Performed straingauge preparation and application; Performed set-up and calibration of engine noise tests and ice ingestion tests).• Test Engineer (Vibration laboratory - Performed bench and tap tests, shaker rig tests, and modal analysis).