Accession Number : AD0635697

Title :   THE NI3AL ORDERING SYSTEM.

Descriptive Note : Technical rept.

Corporate Author : WAYNE STATE UNIV DETROIT MICH DEPT OF METALLURGICAL ENGINEERING

Personal Author(s) : Corey,Clark L. ; Lisowsky,Begdan

Report Date : JUN 1966

Pagination or Media Count : 30

Abstract : Electrical resistivity, x-ray line positions, degree of order, and microstructures have been investigated for Ni-Al alloys near the Ni3Al composition. The results indicate that Ni3Al undergoes disordering between 1250C and the M.P., also supersaturated gamma, produced in gamma + gamma' alloys by gas-quenching, is extensively ordered prior to gamma' (Ni3Al) phase separation. The latter reaction, if not both, must follow the cooperative phenomena model. Shifts in line position as a function of quench-induced supersaturation are shown. Lattice parameters of equilibrium and non-equilibrium phases are given. (Author)

Descriptors :   (*NICKEL ALLOYS, PHASE STUDIES), (*ALUMINUM ALLOYS, PHASE STUDIES), ELECTRICAL RESISTANCE, X RAY SPECTRA, MICROSTRUCTURE, GRAIN STRUCTURES(METALLURGY), CRYSTAL LATTICES, QUENCHING

Subject Categories : Properties of Metals and Alloys
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE