Accession Number : AD0650746

Title :   THE PLASTIC DEFORMATION OF MAGNESIUM.

Descriptive Note : Doctoral thesis,

Corporate Author : MICHIGAN UNIV ANN ARBOR DEPT OF CHEMICAL AND METALLURGICAL ENGINEERING

Personal Author(s) : Kelley,E. W.

Report Date : FEB 1967

Pagination or Media Count : 102

Abstract : Deformation studies were conducted at room temperature on single crystals and textured polycrystals of magnesium and magnesium alloys with thorium and with lithium. Single crystals oriented to suppress shear on the easily activated basal slip systems were deformed by plane-strain compression. Compression along the c-axis was accommodated by <10-11> banding. Compression perpendicular to the unconstrained c-axis activated <10-12> twinning, and, after virtually complete twinning, deformation continued by <10-11> banding in the twinned material. Compression perpendicular to the constrained c-axis was accommodated by the simultaneous operation of <10-12> twinning against the constrain and <10-11> banding. Although this orientation was favorable for <10-10> <12-10> prism and <10-11> <12-10> pyramidal slip, these modes were not observed in pure magnesium or in Mg-.5%Th. However, <10-10> <12-10> prism slip was active in crystals of Mg-4%Li during compression perpendicular to the constrained c-axis. Fracture in all materials occurred parallel to <11-24> or <10-11> depending on the orientation and composition of the specimen. (Author)

Descriptors :   (*MAGNESIUM, DEFORMATION), (*MAGNESIUM ALLOYS, DEFORMATION), THESES, SINGLE CRYSTALS, CRYSTALS, THORIUM ALLOYS, LITHIUM ALLOYS, CRYSTAL STRUCTURE

Subject Categories : Metallurgy and Metallography
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE