Small Punch Testing of Metallic Materials ASTM E3205

The ASTM E3205 test method is used to perform small punch deformation tests on metallic materials. When the test specime n dimensions are constrained by a small irradiation volume or high activity, this test method is useful for studying the effect of radiation damage.... Read More

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    ASTM E3205 test method covers procedures for conducting the small punch deformation test for metallic materials. The results can be used to derive estimates of yield and tensile strength up to 450 °C, and estimates of the ductile-to-brittle transition temperature from the results of small punch bulge tests in the temperature range from -193 °C to 350 °C for iron based materials or 0.4bTm for other metallic materials, where Tm is their melting temperature in K. 

    Test Procedure:

    In ASTM E3025 the small punch test, a disk-shaped specimen is clamped between a die and a downholder and deformed by the punch with a spherical head (radius r=1.25 mm). Characteristic parameters of the force displacement curves are used to estimate mechanical properties (yield stress, ultimate tensile stress). Force-displacement curves at different temperatures allow the estimation of the ductile to brittle transition temperature (DBTT).

    Specimen Size:

    According to ASTM E3205, the bore diameter of the die is 4mm. Thickness of the disk-shaped specimen is 0.5mm. 


    This test is used for the determination of mechanical properties such as yield strength, tensile strength and ductile to brittle transition temperature of structural components. Dimensions are reported in SI units and are considered as standard.


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