Residual Stress Measurement of 7050 Aluminum Alloy Open Die Forgings Using the Hole-Drilling Method

Since this project is a result of a class assignment, it has been graded and accepted as fulfillment of the course requirements. Acceptance does not imply technical accuracy or reliability. Any use of the information in this report, including numerical data, is done at the risk of the user. These risks may include catastrophic failure of the device or infringement of patent or copyright laws. The students, faculty, and staff of Cal Poly State University, San Luis Obispo cannot be held liable for any misuse of the project. ii Acknowledgements I would like to thank everyone that made this project a reality. My advisor, Professor Blair London, helped answering technical questions, organizing industry meetings, and providing support throughout the year. Weber Metals for providing this project, funding and supplying both samples and strain gauges to the project. Specifically I would like to thank Mark Timko and Alex Nunez from Weber Metals for their input and guidance with this project. Without them I would have never been able to learn how to master this hole-drilling method.