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Wednesday, October 20, 2004 - 9:30 AM
FA 5.3

Optical Technique for Measuring Distortion of Heat Treated Parts in Situ

F. M. Sciammarella, Northern Illinois Unvoersity, DeKalb, IL; P. Nash, C. T. Tszeng, Illinois Institute of Technology, Chicago, IL

The use of aluminum for structural applications grows with the continual improvement of their physical properties. Through the various amounts of heat treatments that are available, aluminum can vary in properties for all different types of applications. The heat treatments of these parts are very vital in providing the properties needed for their particular applications. Moreover understanding the effects of heat treatments that may cause distortion to a part is critical. Most of the work carried out in this field is a pre and post measurement after part has experienced its treatment. It would be beneficial to develop a methodology that could predict the behavior of a heat treated part to avoid or prevent failure in its future applicaiton. In this study, we carry out in-situ measurements of the distortions that a heat-treated part undergoes when subjected to temperatures near melting followed by a slow cooling. In order to confirm the experimental measurements we used HOTPOINT to simulate the experiment and compare results. This study will provide much needed insight to the complex occurrences that aluminum parts undergo during heat treatment.

Summary: Understanding the effects of heat treatments that cause distortion to a part is critical. Typically, work carried out in this field is post mortem (after heat treatment). This paper provides in-situ measurements of the distortions that a heat-treated part