Development of a high-resolution micro-torsion tester for measuring the shear modulus of metallic glass fibers
نویسنده
چکیده
A high-resolution micro-torsion tester is developed based on electromagnetism, and the shear modulus of metallic glass fiber (Pd40Cu30Ni10P20) is measured using this tester. The torque is measured by a coil-magnet component and the rotation angle is measured by an inductive angular transducer. The calibration results show that the torque capacity of this tester is 1.1 × 10−3 N m with resolution of 3 × 10−8 N m and the rotation angle capacity is 90° with a resolution of 0.01°. A set of metallic glass fibers, with diameter of about 90 μm, are tested using this tester. The average shear modulus is obtained as 20.2 GPa (±6%).
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