An apparatus for constant load creep test under helium environment

摘要

A device for testing constant load creep under helium environment is provided to perform creep test accurately by preventing the change of the load applied to a test piece through the elastic transformation of steel bellows. A device for testing constant load creep under helium environment comprises: a pull rod(100) with a test piece holder(150); a quartz tube(20) which a pull rod passes through; an electric heater(30) which is integrally coupled to the outer wall of the quartz tube; a movable unit vertically moving the electric heater; a load device(70) applying the load on the test piece(5); a load cell(31) sensing the load applied to the test piece; a micro displacement measuring unit(80) sensing the micro displacement of the pull rod according to the creep movement of the test piece; a gas supplying unit(200) injecting the helium gas into the quartz tube; and a controller(500) controlling the units. The test piece holder fixes the test piece.