Method of making titanium alloy articles having distinct microstructural regions corresponding to high creep and fatigue resistance
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsDaniel Eylon, Francis H. Froes
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Abstract
A method for producing an integral titanium alloy article having at least two regions, each region having a distinct microstructure is provided. The method comprises heat treating one or more selected region(s) of the article at a temperature greater than the beta-transus temperature of the region(s), while simultaneously heat treating the remaining region(s) of the article at a temperature below the beta-transus temperature of the remaining region(s).
Claims12
A method for producing an integral titanium alloy article having at least two regions, each region having a distinct microstructure, which comprises the steps of
- (a) providing a titanium alloy article;
- (b) masking one or more selected region(s) of said article using a masking material impervious to the passage of hydrogen therethrough;
- (c) hydrogenating the thus-masked article to a desired level of hydrogen;
- (d) heating the thus-hydrogenated article to a temperature between the beta-transus temperature of the hydrogenated region(s) and the beta-transus temperature of the non-hydrogenated region(s);
- and,
- (e) cooling the thus-heated article.
A method for producing an integral titanium alloy article having at least two regions, each region having a distinct microstructure, which comprises the steps of
- (a) providing a titanium alloy article;
- (b) hydrogenating said article to a desired level of hydrogen;
- (c) locally heating one or more selected region(s) of said article to a temperature above the beta-transus temperature of the thus-hydrogenated article;
- (d) simultaneously heating the remainder of the thus-hydrogenated article to a temperature below the beta-transus temperature of the thus-hydrogenated article;
- and,
- (e) cooling the article.
Dependencies are inferred from the claim text.