<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>The article presents the results of diagnostic examination of P265GH boiler steel plate. During blanking, cutting and cold forming of elements from this plate, their spontaneous plastic deformation and warping took place, indicating an unfavourable internal stress state of a considerable magnitude occurring in the steel plate. In order to identify the causes of this situation, examinations were carried out, which included a microstructure assessment and a Vickers hardness test. In view of the absence of clear differentiation, in terms of both structure and hardness, in different steel plate areas, diagnostic examination was performed by the Barkhausen magnetic method, which included the determination of the principal direction of residual stresses and the determination of their anisotropy based on the measurement of the effective value of Barkhausen noise. As their result, a significant anisotropy of residual stresses was revealed on the steel plate surface. Moreover, the adverse phenomenon of perpendicularity of the principal directions of stresses was found to occur on the opposite plate surfaces, being the direct cause of warping of elements cut out from the plate</p></abstract>

The article presents the results of diagnostic examination of P265GH boiler steel plate. During blanking, cutting and cold forming of elements from this plate, their spontaneous plastic deformation and warping took place, indicating an unfavourable internal stress state of a considerable magnitude occurring in the steel plate. In order to identify the causes of this situation, examinations were carried out, which included a microstructure assessment and a Vickers hardness test. In view of the absence of clear differentiation, in terms of both structure and hardness, in different steel plate areas, diagnostic examination was performed by the Barkhausen magnetic method, which included the determination of the principal direction of residual stresses and the determination of their anisotropy based on the measurement of the effective value of Barkhausen noise. As their result, a significant anisotropy of residual stresses was revealed on the steel plate surface. Moreover, the adverse phenomenon of perpendicularity of the principal directions of stresses was found to occur on the opposite plate surfaces, being the direct cause of warping of elements cut out from the plate

Diagnostic Examination of P265GH Boiler Steel Plate Using the Barkhausen Method

Faculty of Materials Processing Technology and Applied Physics, Częstochowa University of Technolgy, Częstochowa, Poland

Advances in Materials Science

{"article-title":"Diagnostic Examination of P265GH Boiler Steel Plate Using the Barkhausen Method"}

The article presents the results of diagnostic examination of P265GH boiler steel plate. During blanking, cutting and cold forming of elements from this plate,...

Diagnostic Examination of P265GH Boiler Steel Plate Using the Barkhausen Method

Pubblicato online: 28 gen 2011

Pagine: 81 - 92

DOI: https://doi.org/10.2478/v10077-010-0020-2

Parole chiave
Barkhausen effect, residual stress, anisotropy

This content is open access.

Diagnostic Examination of P265GH Boiler Steel Plate Using the Barkhausen Method

Pubblicato online: 28 gen 2011

Pagine: 81 - 92

DOI: https://doi.org/10.2478/v10077-010-0020-2

Parole chiaveBarkhausen effect, residual stress, anisotropy

This content is open access.

Parole chiave
Barkhausen effect, residual stress, anisotropy