Abstract:

For achieving the stress evaluation of plasma sprayed cladding layer based on metal magnetic memory testing technology, static tensile tests of plasma spraying specimen are carried out. Meanwhile, the magnetic signal is measured through the tensile tests. The normal component of magnetic signal, H_p(y), and its gradientK, the tangential component of magnetic signal, H_p(x), and its average value, H_p(x)_avg, changing with tensile stress are investigated. The results indicate that theH_p(y) rotated anticlockwise and its gradientK increase exponentially, andH_p(x)_avg increases linearly with the increase of stress in the elastic stage. While in the plastic stage, theK andH_p(x)_avg decrease with the further increase of stress. The mechanism of stress evaluation of plasma sprayed cladding layer is discussed from viewpoint of the microstructure and magneto-mechanical effect.

Key words: cladding layer, microstructure, plasma spraying, tensile stress, metal magnetic memory