Apparatus and method for testing thermal fatigue resistance

Details Apparatus and method for testing thermal fatigue resistance Apparatus and method for testing thermal fatigue resistance

1996-10-24

1999-11-09

Hirshfeld, Andrew

Thermal measuring and testing

Thermal testing of a nonthermal quantity

Of susceptibility to thermally induced deteriouration, flaw,...

374 5, 738656, G01N 360

Patent

active

059801034

ABSTRACT:
An apparatus and method for testing thermal fatigue resistance. The apparatus utilizes a unified heating device and cooling device so that the apparatus is smaller and simpler and a more even temperature distribution can be obtained. The apparatus has at least one gas duct facing the test unit and a device for supplying the duct with a compressed gas flow. A plurality of gas ducts may be used which face plural points on the test unit from plural directions. Thermocouples are placed on several points on the test unit and the temperatures of the points measured. Swift and precise testing of thermal fatigue resistance can be performed by a feedback control of each heating device based on the measured temperature. Thermal strains are caused in certain parts of the test unit due to differences of thermal expansion between members of the test unit.

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patent: 4787752 (1988-11-01), Fraser et al.
patent: 4793716 (1988-12-01), Wei et al.
patent: 4807247 (1989-02-01), Robbins, III
patent: 4817447 (1989-04-01), Kashima et al.
patent: 5039228 (1991-08-01), Chalmers
patent: 5294199 (1994-03-01), Boersen et al.

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