Apparatus for forming longitudinal thermal-fatigue cracks

Details Apparatus for forming longitudinal thermal-fatigue cracks Apparatus for forming longitudinal thermal-fatigue cracks

2011-07-26

2011-07-26

Kastler, Scott (Department: 1733)

Metallurgical apparatus

Means treating solid metal

By cooling of the solid

C266S259000, C266S044000, C073S808000

Reexamination Certificate

active

07985370

ABSTRACT:
An apparatus for forming longitudinal thermal fatigue cracks. A heating unit has an induction coil disposed adjacent to an outer circumference of one side of a tubular test piece, on an inner surface of which a notch is formed. A cooling unit has a cooling water pump and a cooling water hose which forcibly injects cooling water from a cooling water storage source into an inner circumference of the tubular test piece. A control unit controls operation of the heating and cooling units. A cooling block partially encloses the outer circumference of the tubular test piece so as to control a magnitude of y-axial stress, is supplied with a cooling source of fluid or gas from an outside so as to repetitively cool the tubular test piece heated by the heating unit to adjust a temperature gradient, and has a longitudinal slit for controlling crack positions.

REFERENCES:
patent: 6723185 (2004-04-01), Elfving et al.
patent: 7559251 (2009-07-01), Lee et al.
patent: 2006/0113010 (2006-06-01), Saitou et al.
patent: 1020070122349 (2007-12-01), None

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