Material surface cyclic impact fatigue test device and test method

Abstract

The invention discloses a material surface cyclic impact fatigue test device and a test method. The device comprises an L-shaped swing arm, a swing arm base, a first bracket, a sliding groove swash plate, a heating assembly, a first fixed base, a second fixed base and a motor driving mechanism. The end of the horizontal section of the L-shaped swing arm is movably connected with the swing arm base, the end of the vertical section of the L-shaped swing arm makes contact with the sliding groove of the sliding groove swash plate through a rolling head, and a lower adjustable electromagnet is arranged on the horizontal section of the L-shaped swing arm. An upper adjustable electromagnet is arranged on the first support, and the upper adjustable electromagnet is arranged right above the lower adjustable electromagnet; during the test, the first fixing base fixes an upper sample, extends out of the heating assembly and is fixedly connected with the lower adjustable electromagnet, and the second fixing base fixes a lower sample and is arranged in the heating assembly; and the motor driving mechanism is connected with the sliding groove swash plate. The device can realize cyclic impact with higher impact frequency under the highest high-temperature condition of 800 DEG C.

Description

technical field [0001] The invention relates to a material surface high-temperature cycle impact fatigue test device and a test method, belonging to the technical field of material mechanical performance testing. Background technique [0002] Impact fatigue refers to the failure phenomena of crack initiation, accumulation, and even material peeling or fracture on the surface of parts under fixed or unfixed cyclic impact loads. It is also one of the common forms of fatigue in life. In particular, the vibration generated during the operation of the equipment or brought about by the environmental conditions is the key factor causing the rigid impact between the components, which has brought a lot of unnecessary economic losses to the industrial production activities of the society. High-temperature cyclic impact fatigue is the impact fatigue behavior that occurs under the action of cyclic loads in an environment higher than normal temperature. Typically, the temperature of the ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of material surface high-temperature cyclic impact fatigue test device, which solves the problems of the current cyclic impact fatigue test device under high temperature conditions. Impact performance assessment relies on Charpy method, Izod method and falling ball method, and lacks the status quo of cyclic impact fatigue assessment and evaluation equipment under specific high temperature conditions. At the same time, this equipment can realize the miniaturization and standardization of fatigue samples. The sample structure is simple and easy to process, which can effectively control the test cost

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