Real Time Sensing and Control of Out-of-Plane Distortion Due to Line Heating by Laser.
Abstract
Experiments were conducted using a U.T.C. 15 kw CO2 laser. The laser was used as a heat source to perform line heating on HY-80 and AISI 1018 specimens. The resulting angular distortion, as a function of heat input, speed, and number of passes, was measured. This out-of-plane distortion is measured using an interferometer which uses a 5 mw helium-neon laser as a light source. As the interference fringes appear on the specimen surface, they are recorded by a video camera and stored on a video cassette recorder to provide real time distortion information. HY-80 averaged 0.8 per pass while AISI 1018 averaged 1.1 per pass. Strain and temperature data were taken to be used as baseline data. The results are presented in the form of temperature and strain plotted against time. A heat transfer/temperature analysis was performed using ADINAT; results of experimental and analytical temperatures are plotted for comparison. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1984
- Accession Number
- ADA144773
Entities
People
- R. C. Johnson
Organizations
- Massachusetts Institute of Technology