Accession Number : AD0693238

Title :   THE RECRYSTALLIZATION KINETICS OF MAGNESIUM CONTAINING SMALL AMOUNTS OF IMPURITY ELEMENTS, GRAIN GROWTH OF DILUTE ALLOYS OF MAGNESIUM AND ELECTRON MICROSCOPY OF THE DUCTILE BRITTLE TRANSITION IN CHROMIUM.

Descriptive Note : Final scientific rept.,

Corporate Author : UTAH UNIV SALT LAKE CITY DEPT OF MINERAL ENGINEERING

Personal Author(s) : Pitt,Charles H. ; Odekirk,Theron G. ; Hong,William J. ; Shim,H. S.

Report Date : 25 JUL 1969

Pagination or Media Count : 118

Abstract : Experimental work has been carried out to determine the recrystallization kinetics of magnesium-cadmium and magnesium-zirconium dilute alloys. A theory has been developed to explain the linear variation of per cent recrystallization with log time as observed in these alloys. Measurements of normal grain growth was made in magnesium-zinc and magnesium-manganese alloys and was found to obey the normal grain growth law, D squared = kt. The mechanism for grain growth was found to be a single step process with an activation energy of 18 kilocalories per mole. Preliminary work was accomplished in preparing specimens and building apparatus for low temperature testing of pure chromium tensile specimens. (Author)

Descriptors :   (*MAGNESIUM ALLOYS, RECRYSTALLIZATION), (*CHROMIUM, *DUCTILE BRITTLE TRANSITION), (*GRAIN STRUCTURES(METALLURGY), CRYSTAL GROWTH), (*GRAIN SIZE, MEASUREMENT), CADMIUM ALLOYS, MANGANESE ALLOYS, ZINC ALLOYS, ZIRCONIUM ALLOYS, ELECTRON MICROSCOPY, COLD WORKING, ANNEALING

Subject Categories : Metallurgy and Metallography
      Crystallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE