Internal Stresses in Wires for High Field Magnets

Conference · Thu Oct 01 00:00:00 EDT 1998

OSTI ID:759437

Han, K ^[1]; Embury, J D; Lawson, A C; Von Dreele, R B; Wood, J T; Richardson, Jr, J W

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1. Los Alamos National Laboratory

The codeformation of Cu-Ag or Cu-Nb composite wires used for high field magnets has a number of important microstructural consequences, including the production of very fine scale structures, the development of very high internal surface area to volume ratios during the drawing and the storage of defects at interphase interfaces. In addition, the fabrication and codeformation of phases which differ in crystal structure, thermal expansion, elastic modulus and lattice parameter lead to the development of short wavelength internal stresses. These internal stresses are measured by neutron diffraction and transmission electron microscopy as a function of the imposed drawing strain. The internal stresses lead to important changes in elastic plastic response which can be related to both magnet design and service life and these aspects will be described in detail.

• Research Organization: Los Alamos National Lab., NM (US)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 759437
• Report Number(s): LA-UR-98-4368
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COPPER ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
FABRICATION
LATTICE PARAMETERS
MAGNETS
NIOBIUM ALLOYS
RESIDUAL STRESSES
SERVICE LIFE
SILVER ALLOYS
SURFACE AREA
THERMAL EXPANSION