An investigation into the Effect of Elastic Deformation by Tension (Compression), Torsion and Hydrostatic Pressure on the Magnetic Characteristics of Pipe Steel

摘要

The paper studies the effect of elastic deformation by tension/compression, torsion, internal pressure and their combinations on the magnetic characteristics of X70 control-rolled engineering steel. A unique dependence has been established between stress intensity and coercive force at various values of the Lode parameter. To make the determination of the stress tensor invariants more reliable in case the type of loading is unknown, the velocity of acoustic wave propagation in the material is proposed to be used as an informative test parameter in addition to magnetic characteristics.