Events Calendar
Pitt Seminar on Stress Assessment
10/30/2009 1:00:00 PM - University of Pittsburgh, Swanson School of Engineering, Benedum Hall, Room 921
Materials state awareness requires detailed knowledge of the current state of materials so that the remaining capabilities of vital components and full systems can be predicted with high degree of accuracy and known level of confidence. Since residual stress assessment is necessary to predict the remaining service life of fracture-critical components, it is also an integral part of complete materials state awareness. For a long time, nondestructive residual stress assessment has been one of the greatest opportunities as well as one of the greatest challenges for the nondestructive evaluation (NDE) community, and probably it will remain so in the foreseeable future. The only well-established NDE method of residual stress measurement is based on X-ray diffraction, which however does not have the required penetration depth in most applications unless high-energy neutron radiation is used. This talk presents an overview of various indirect techniques that have been recently developed for nondestructive residual stress profiling. Ultrasonic, thermoelectric, and electromagnetic NDE techniques are reviewed and the current status of their technology development is assessed.
Bio: Peter B. Nagy is the Herman Schneider Professor of Aerospace Engineering and Engineering Mechanics at the University of Cincinnati and a Visiting Professor in the UK Research Centre in Nondestructive Evaluation (NDE) at Imperial College London. Dr. Nagy specializes in ultrasonic, electromagnetic, and thermoelectric materials characterization and has published about 200 research papers and book chapters on these subjects. His primary research interest is nondestructive evaluation of material damage caused by fatigue, creep, fretting, corrosion, erosion, and other types of service-related degradation and quantitative assessment of residual stress. Dr. Nagy has been serving the international journal Ultrasonics as its Associate Editor responsible for nondestructive testing methods since 2001 and has become the Associate Editor of Journal of NDE responsible for electromagnetic methods in 2009. He is an elected Fellow of the Acoustical Society of America and has recently received the 2009 Roy Sharpe award of the British Institute of Nondestructive Testing for his achievements in ultrasonic and electromagnetic NDE.
Faculty Host: Piervincenzo Rizzo, Ph.D. pir3@pitt.edu ; 412-417-4846