高静水圧下引張試験装置について

概要

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An apparatus for tensile testing of metallic materials under constant high hydrostatic pressure up to 15000kg/cmcm<SUP>2</SUP> has been designed and constructed. This apparatus is so devised that during the tensile test two plungers each of diameter of 30mm are fixed in a high pressure cylinder, held fast together so as to keep the pressure inside the cylinder constant, and that the specimen which is attached to the lower plunger will be pulled by the shift of position of the cylinder to these plungers. The fluctuation in pressure during the test is so small that it is not detectable by the ordinary manganin pressure gauge. The change of the pressure is workable during the test, in case it is desirable by using a couple of Bridgman type tensile yokes and making the lower plunger, which is released of the specimen, shift its position by itself. In this case the fluctuation in pressure increases, but it remains within 100kg/cmcm<SUP>2</SUP>. The load is measured by a magnetostrictive load cell set in the high pressure chamber, The ongation of the specimen is obtained by measuring the movement of the cylinder. The dimension of the specimen is 3-5mm in diameter and 30-40mm in gauge length. The maximum load applicable to the specimen is 1000kg.
公益社団法人日本材料学会の論文