Open AccessApplication of the “Brazilian test” to determine the strength of materials obtained by electric pulse consolidation of powders
Author(s) -
V. Yu. Gol’tsev,
E. G. Grigor’ev,
N. A. Gribov,
А. В. Осинцев,
A. S. Plotnikov
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/558/1/012012
Subject(s) - materials science , consolidation (business) , ultimate tensile strength , composite material , tensile testing , brittleness , alloy , graphite , accounting , business
Testing of short cylinders according to the “Brazilian test” scheme is considered as a method of assessing the tensile strength of brittle materials obtained by electric pulseconsolidation of powders. The paper presents a calculated using FEM and an experimental analysis of the behavior of short cylinders (thick disks) when loaded according to the “Brazilian test” scheme. The calculation shows the weak influence of the disk thickness on the average and maximum tensile stresses in the plane of symmetry of the disk. Results of testing of small samples made of cast iron and graphite are presented. It is shown a good correspondence between the results of the test samples from cast iron when using formula recommended by the ASTM Standard D3967-95a, and the strength of the material when tested in tension. The results of testing samples of graphite were 1.5–2 times less than its tensile strength. The results of testing of small-size samples of heavy alloy WNiFe and aluminum oxide obtained by electric pulse consolidation of powders are presented. The influence of the pressure and current pulse on the fracture resistance of the alloy WNiFe and the sample thickness on the strength of Al 2 O 3 is investigated. Thus, the possibility of testing small samples according to the “Brazilian test” scheme to determine the tensile strength of materials obtained by electric pulse consolidation of powders is demonstrated.