IDEA #7Q7XHP New Methods Of Laser Interferometry For Quality Control And Determination Of Stressed State Of Welded Joints

APPLIED RESEARCH • QUALITYCONTROL AND ASSURANCE NEW METHODS OOFF LASER INTERFEROMETRY FOR QUALITY CONTROL AND DDEE(cid:2)(cid:2)TERMINATION OOFF STRESSED STATE OOFF WELDED JOINTS Description A method and compact unit have been developed for in(cid:2) process determination of residual stresses in structures using electron speckle(cid:2)interferometry in combination with drilling of blind holes of 1 mm diameter and depth, used for relaxation of stresses. A software and equipment have been developed for automatic quality control of structures manufactured of differ(cid:2) ent structural materials using the method of electron shearog(cid:2) raphy. Innovative Aspect and Main Advantages Technology and compact unit of 205x205x250 mm size and ~ 1.2 kg mass have been developed, allowing determination of residual stresses in structures with a high accuracy (6 % of yield strength of material being examined) using the method of electron speckle(cid:2)interferometry. Compact equipment and a package of programs have been developed allowing automatic control of defects in examined objects manufactured of metallic and non(cid:2)metallic materials using the method of electron shearography. Areas ooff Application Machine(cid:2)building, aircraft and aerospace industry 1. Shearographic Module; 2. Laser; 3. Computer Stage ooff Development Tested, accessible for demonstration, field (full(cid:2)scale) trials were performed. Contact Details Dr. Pivtorak V.A. The E.O. Paton Electric Welding Institute of NAS of Ukraine 11, Bozhenko str., Kiev, 03680, Ukraine Tel./Fax: +380(cid:2)44(cid:2)287(cid:2)5533 holo@carrier.kiev.ua holo@paton.kiev.ua 1. Speckle(cid:2)Interferometer; 2. CCD(cid:2)Camera; 3. Light Guide; 4. Laser; 5. Computer 78