Small punch test apparatus capable of quantitative evaluation of material embrittlement behavior under various gas hydrogen environments

摘要

The present invention relates to a technique capable of quantitatively evaluating material embrittlement behavior under various gas-hydrogen environments (temperature, pressure). In the present invention, a test piece is fixed inside a jig consisting of an upper and lower dies, a gas is filled in the lower part of the test piece, a punch for applying a force is included in the upper part, and the test is performed in an environment of inflowing gas. Small punch tester that bends and deforms a piece vertically downward to measure; a heat insulating container provided so as to wrap the jig inside; the temperature inside the heat insulating container connected to the inside of the heat insulating container and the temperature of the test piece A temperature measuring device for measuring temperature; a heat transfer device provided on the outer peripheral surface of the jig and heating or cooling the test piece by an external heat transfer means so that the test piece is heat-transferred; and the test. It is characterized by including a controller; which controls the heat transfer device to match the already set temperature of the piece. [Selection diagram] Fig. 3