THE APPLICATION OF EQUAL CHANNEL ANGULAR EXTRUSION TO PRODUCE EXTRAORDINARY PROPERTIES IN ADVANCED METALLIC MATERIALS Conference Paper uri icon

abstract

  • Equal Chall Angular Extrusion, ECAE, is an innovative material processing method that has many technological benefits for a wide range of materials. The process is near 'ideal' since the deformation is uniform and the energy requirements are minimum. ECAE imposes heavy uniform deformation throughout massive billets with no change in cross-section. With multiple passes very high strains can be attained, e.g., for 8 passes the equivalent strain is 9.2 and the equivalent area reduction ratio is 10,000:1. The objective of the work reported was to demonstrate ECAE as processing method for developing high levels of room temperature strength (with a minimum loss in conductivity) for relatively massive sections of C11000 copper. Results are encouraging, yielding an optimal balance of strength (440 MPa ultimate and yield), ductility (area reduction =55%, elongation=13%), and electro-conductivity (approx. 98% IACS) after four passes using Route C. These results are close to material requirements for high-field magnet conductors and may be improved by subsequent heat treatment. Other copper (C10100) and copper alloys (Cu-Nb, Cu-Ag) are currently being evaluated.

author list (cited authors)

  • SEGAL, V. M., GOFORTH, R. E., & HARTWIG, K. T.

publication date

  • December 1993