FRICTION WELDING TO BOND SIMILAR METALS

FRICTION WELDING INVOLVES RUBBING TWO PIECES OF MATERIAL TOGETHER SO THAT THE HEATING OF THE RUBBING SURFACES CAUSES THE MATERIAL TO BECOME LOCALLY PLASTIC. WHEN THIS HAPPENS, A HYDRAULIC RAM SQUEEZES THE TWO COMPONENTS INTO INTIMATE CONTACT. THE RUBBING IS ACHIEVED BY ROTATION OF ONE PART OVER THE OTHER, AND MUST BE QUICKLY STOPPED AFTER BOND HAS BEEN FORMED. THE MACHINE OF THE BRITISH WELDING RESEARCH ASSOCIATION AT CAMBRIDGE BRAKES 5000 RPM TO STANDSTILL IN 0.1 SEC. USING DISC BRAKES. TESTS REVEAL THAT THE TENSILE STRENGTH OF THE WELD IS AS STRONG AS THE WEAKER METAL AND THAT THE JOINT CAN WITHSTAND REPEATED THERMAL SHOCK TREATMENT. STAINLESS STEEL HAS BEEN WELDED. TO PURE ALUMINUM. OTHER DISSIMILAR MATERIAL COMBINATIONS UNDER INVESTIGATION ARE COPPER TO ALUMINUM AND METALS TO CERAMICS.

• Supplemental Notes:
  • Vol 30, No 501, PP 780-781, 4 PHOT
• Publication Date: 1966-6-23

Media Info

• Serial:
  • New Scientist /UK/

Subject/Index Terms

• TRT Terms: Aluminum; Ceramic materials; Copper; Crash investigation; Friction; Hydraulic equipment; Materials; Metals; Stainless steel; Studies; Welding
• Uncontrolled Terms: Hydraulic machinery
• Old TRIS Terms: Rams; Rubbing
• Subject Areas: Geotechnology; Highways; Materials; Safety and Human Factors;

Filing Info

• Accession Number: 00216156
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 24 1994 12:00AM