@inproceedings{sgem2017s18009, title = {CONTRIBUTIONS OF THE ULTRASOUND FIELD INFLUENCE ON CHEMICAL COMPOSITION CHANGE IN THE REWORKING PROCESS BY ULTRASONIC WELDING}, author = {Gheorghe Amza and Valentin Dan Petrescu and Dan Florin Nitoi and Agustin Semenescu and Oana Roxana Chivu}, booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Energy and Clean Technologies}, year = {2017}, pages = {67-74}, publisher = {STEF92 Technology}, doi = {10.5593/sgem2017/41/s18.009} }