Process for strengthen grain boundaries of an article made...

Details Process for strengthen grain boundaries of an article made... Process for strengthen grain boundaries of an article made...

2006-06-20

2006-06-20

Hiteshew, Felisa (Department: 1722)

Single-crystal, oriented-crystal, and epitaxy growth processes;

Processes of growth with a subsequent step of heat treating...

C117S084000, C427S252000, C427S253000

Reexamination Certificate

active

07063740

ABSTRACT:
It is disclosed a method for strengthen the grain boundaries of an article (1) made from a Ni based superalloy while the article (1) is in the solid state and containing at least one grain boundary. A surface diffusion process is applied to the article (1) to enrich the at least one grain boundary with grain boundary strengthening elements of one or a combination of boron, hafnium, zirconium without forming brittle precipitates like borides or carbides.

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