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Effects of tensile and compressive stress on 3% grain-oriented silicon iron

The magnetic properties were measured when the material was subjected to tensile and compressive stress. The effect of tensile stress up to 120 MN m-2 applied along the rolling direction was to increase the magnetizing force and decrease the losses. Compressive stress up to 50 MN m-2 caused both the magnetizing force and losses to rise. Surface domains oriented along the (001) direction have been observed to take up positions perpendicular to the rolling direction when the stress was approximately 5 MN m-2 and a clearly defined pattern re-appeared which corresponded to domains oriented in the (010) and (100) directions.