Calibration of volume residual stress measurements by the neutron 
                diffraction technique and applications


                Record Control Number : 22513
                Quality Validation Date : 1999-05-24
                Update Date : 1999-05-24
                Abstract : In the framework of this project Neutron diffraction is proposed to 
                use for the validation and calibration of portable non destructive 
                techniques for stress measurement, like ultrasonic (US)  and 
                magnetic methods (MM) . For tests and the calibration task typical 
                specimens for different applications are used. At first cold rolled 
                disks prepared for a forming process had been considered at the 
                high resolution Fourier diffractometer at IBR2 in Dubna The 
                combined influence of residual stress and texture of the cold 
                rolling process was investigated and a calibration for magnetic and 
                ultrasonic non-destructive techniques were performed. A clear 
                effect of the residual stress state on the following forming 
                process was found and the magnetic Barkhausen-noise measurements 
                provides an effective way for a fast test of the quality of the 
                disk A lot of work was done to improve the equipment at HRFD for 
                precise strain measurement along different directions and even 
                under external load. In collaboration with the project partners 
                much efforts were undertaken at the HRFD to reach the state of art 
                of precise stress determination at reasonably small gauge volumes 
                This was demonstrated using a sample of shape welded ferritic layer 
                on an austenitic tube.
                Subject Descriptors : Expert systems
                Subject Index Codes : Information Processing, Information Systems
                Collaboration Sought : Information exchange
                Programmes : INTAS
                Projects : INTAS-94-3239
                Project Title : Calibration of volume residual stress measurements by the neutron 
                diffraction technique and applications


                Contact Details
                  Contact Name : SCHREIBER, J.
                  Department : Fraunhofer Institute for Nondestructive Testing
                  Contact Organisation : Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V.
                  Address : Krügerstraße 22
                  City : Dresden
                  Region : SACHSEN
Dresden, Kreisfreie Stadt
                  Postcode : 01326
                  Country : GERMANY
                  Telephone Number : +49-351-3748259
                  Fax Number : +49-351-3748218