Measurement of internal tensile stress in Co68.2Fe4.3Cr3.5Si13B11 glass-coated amorphous microwires using the stress sensitivity of saturation magnetostriction

Abstract The internal tensile stresses in Co 68.2 Fe 4.3 Cr 3.5 Si 13 B 11 glass-coated amorphous microwires are measured experimentally by using the stress sensitivity of saturation magnetostriction. The obtained results show that the internal tensile stress is 1420 MPa for microwire with metallic core diameter of 20.7 µm and glass cover thickness of 14.5 µm, while it decreases to 640 MPa after glass removal. The measured results agree well with the theoretical results calculated by Chiriac et al.