Abstract
Abstract A method has been developed to investigate the effect of gas release from metal specimens under the action of mechanical loading. The method is based on the use of a chemical MIS (metal-insulator-semiconductor) sensor of Pd-SiO 2 -Si type. The developed method allows investigations to be carried out in different gaseous media in a wide range of pressures both above and below atmospheric pressure. A set-up has been designed and used for the measurement of H 2 mass released on rupturing test specimens of steel, aluminium, copper and zirconium. The H 2 mass released from different metals is different and varies in the range 10 −9 -10 −10 g. The measurements are carried out in an inert medium (He) at atmospheric pressure. The effect of gas release from stainless steel specimens before the threshold of failure has been observed. The character of the gas release from strained specimens enables one to judge their mechanical strength.
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