Influence of the Magnetomechanical Effect in Testing of Inductively Heated Ferritic Steel.

摘要

The use of a thermocouple spot welded to a specimen shoulder for temperature control in induction heated elevated temperature mechanical tests of ferritic alloys has been found inadequate to provide an unvarying temperature in the specimen gage. The magnetomechanical effect sufficiently alters the inductive coupling to produce both temperature cycling of +15K-50K and an overall cooling of 10K with mechanical cycling. These temperature changes can dominate the apparent strain measurements under conditions of limited plasticity.