Dana J. Medlin, Ph.D., P.E., FASM

Dana J. Medlin, Ph.D., P.E., FASM
Metallurgical and Materials Engineering Expert
Vice President, Metallurgical Engineering

Dr. Medlin has more than 30 years of experience leading multidisciplinary failure analysis and design projects in metallurgical and materials science engineering, corrosion engineering, materials joining and welding, and biomedical engineering for a variety of companies and firms. 

He has testified internationally as an expert witness in cases involving medical device, automotive, aerospace, heavy equipment, fire/wildfire investigations, firearms, ammunitions, plumbing, and marine applications. Specific areas of experience include: failure analysis & remedial action, medical device design and validation, bearing and gear investigations, welding metallurgy, corrosion evaluations and testing, mechanical testing, heat treatment issues, plumbing failures, metallurgical related fire investigations, and polymer/plastic failure investigations. He also teaches metallurgical and materials engineering courses for industry and professional societies. 

Dr. Medlin is a Fellow of ASM-International, a distinguished honor in the field of metallurgical and materials science engineering. He is also a Technical Advisor Member of the Association of Firearm and Tool Mark Examiners (AFTE), was previously the Kielhorn Professor of Materials Joining & Welding Engineering at LeTourneau University, and also the NUCOR Professor of Metallurgy at the South Dakota School of Mines & Technology. He is currently the Vice President of Metallurgical Engineering at Eurofins EAG. Dr. Medlin has published and presented over 135 technical papers, presentations, books, and patents.

Dr. Medlin has extensive experience working as a metallurgical/materials engineering expert witness in complex litigation cases for both plaintiffs and defendants. He is based in our Los Angeles Laboratory location.

Areas of Expertise

  • Experience managing multidisciplinary failure analysis and design projects
  • Failure analysis of metallic and non-metallic (glass, polymer, plastic, ceramic, composites, rubber) materials
  • Fractography and fracture analysis
  • Physical metallurgy
  • Mechanical metallurgy
  • High and low temperature oxidation and corrosion of metals and alloys; corrosion protection
  • Heat treatment of metals and alloys
  • Coating evaluation and development
  • Evaluation of welding, brazing, and soldering techniques and processes
  • Cost-effective material selection, product development, and manufacturing process improvement
  • Assistance as a metallurgy expert witness, product liability and patent infringement trials


  • Orthopedic Failures, Hip Implant Failures, Acetabular Cup, Knee Implants, Spinal Implants, Dental, Guidewires, Fixation Plates, Pedicle Screws, Cardiovascular Implants, Intramedullary Rods (IM Rods), Surgical Needle Failures, Surgical Instrument Failures, Braces, Wheelchair Failures, Explant Analysis, Retrieval Analysis, etc.
  • Medical Device Failure Analysis od Metal and Polymer Components
  • Expert in Implantable Materials Used in Medical Devices: Nitinol, CoCrMo Alloys, Titanium Alloys, Stainless Steels, Porous Coatings, Polymers, Polyethylene, etc.
  • Medical Device Corrosion Expert
  • FDA 510K Submission Experience
  • Materials Selection and Design
  • Product Development and Quality Control
  • Process Validations/Manufacturing Validations and Analysis
  • Intellectual Property and Patent Issues with medical devices


  • Corrosion Engineering and Mitigation (Pipelines, Sprinklers, Tanks, Ships, Medical Implants, Automobiles, Railroads, Cables, Aircraft, Electrical Components, etc.)
  • Corrosion Expert – ASTM, NACE, ISO, etc.
  • Crevice Corrosion Testing, Galvanic Corrosion Testing, Corrosion Fatigue Testing, etc.
  • Failure Analysis of Corrosion Related Failures and Remedial Action Recommendations


  • Failure Analysis and Remedial Action – Metallurgical and Materials Science Engineering
  • Experienced with Managing Multidiscipline Failure Investigations
  • Fatigue and Fracture Analysis – Ferrous and Nonferrous Alloys
  • Materials Characterization – Optical, SEM, TEM, XRD, etc.
  • Applied Research and Development – Product and Process Development
  • Metallurgy Expert – Carbon Steels, Alloy Steels, Titanium, Co/Cr Alloys, Cast Irons, Aluminum Alloys, etc.
  • Bearing and Gear Failure Analysis – Aerospace, Automotive, Marine, Heavy Equipment, Railroads, Mechanical Systems, etc.
  • Heat Treatment Issues – Annealing, Stress Relief, Carburizing, Nitriding, Quenching, etc.
  • Polymer (Plastic), Ceramic, Glass, Composite, and Rubber Failure Analysis
  • Wear Mechanisms and Mitigation
  • Firearm Investigations and Ammunition Failure Analysis
  • Welding Engineering Failure Analysis – TIG, MIG, Alloys, etc.
  • Mechanical Testing – Metal Fatigue, Torsion, Compression, Tensile, Bending, Stress Corrosion Cracking, etc.
  • Product Development and Quality Control
  • Process Validations/Manufacturing Validations
  • Intellectual Property and Patent Issues

Would you like to learn more about Expert Witness Testimony?

Contact us today for your Expert Witness Testimony needs at +1 877-709-9526 or please complete the form below to have an EAG expert contact you.

To enable certain features and improve your experience with us, this site stores cookies on your computer. Please click Continue to provide your authorization and permanently remove this message.

To find out more, please see our privacy policy.