Accession Number : ADD004524

Title :   Method of Treating Unique Martensitic Alloys.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Wang,Frederick E

Report Date : 20 Jul 1971

Pagination or Media Count : 5

Abstract : This invention relates to a new method of heat treatment of an alloy whereby its properties are improved in a controlled way. More particularly, the alloy is heated at 650 to 700 C. Prior to this invention, alloys such as TiNi had been heated above its martensite temperature from about 600 C to 850 C for a time period slightly longer than that required to heat the material, which was usually less than an hour. The heating was in most cases followed by a cooling rate determined by the mass of the specimen and the normal heat flow to a still air surrounding. The treatment with near-stoichiometric TiNi varied slightly from this procedure in that the heating range was 700 C to 800 C for about a few hours.

Descriptors :   *Patents, *Martensite, Titanium alloys, Nickel alloys, Cobalt alloys, Iron alloys, Annealing, Cooling, Thermal cycling tests, Heat treatment, Stoichiometry, Energy conversion, Production control

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE