In-situ sound energy control method for residual stress fields of elastic solids

• Main Authors: XU CHUNGUANG, SONG WENTAO, XIAO DINGGUO, PAN QINXUE, LIU HAIYANG, XU LANG, GUO JUN, LI XIAO
• Format: Patent
• Language: Chinese; English
• Published: 01.05.2013
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CONTROLLING; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PHYSICS; REGULATING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention relates to the field of eliminating the residual stress of materials, in particular to an in-situ sound energy control method for the residual stress fields of elastic solids. The method mainly adopts one or more focused high-energy transducers, a high-energy focal region is formed in the far field of a test piece by controlling the incidence angles, frequencies, phases and other different excitation parameters of high-energy ultrasonic beams, the particle wave energy of high-energy sound waves is utilized to promote dislocation glide and weaken or change the constraining force between crystal lattices, and thereby the local residual stress states on the surface and subsurface of the member and at different depths in the member can be quantitatively regulated and controlled. The method adopting a plurality of focused high-energy transducers to carry out far-field focusing, which is disclosed by the invention, can perfectly solve the problem that the power of a single ultrasonic transducer is not