THE INFLUENCE OF SURFACE OXIDE ON THE MEASUREMENT OF STRESSES IN FERRITIC STEEL COMPONENTS
To assess the integrity of engineering components, it is necessary to have knowledge of both the system and residual stresses. In practice, many components fabricated from ferritic steel have a covering of surface oxide. X-ray diffraction is a non-destructive method for measuring surface stresses. It is usual to remove oxide from the surface prior to measuring the stresses using a combination of grinding, mechanical and electropolishing. In this paper we investigate the ability to measure by X-ray diffraction stresses in a ferritic steel (A533B) without the removal of surface oxide. Stresses have been measured on a plate into which a known stress distribution has been introduced and X-ray diffraction measurements made with and without oxide removal. The results demonstrate that it is feasible to measure stresses in the metal substrate by X-ray diffraction when the oxide is less than a limiting thickness. An application to the measurement of stresses in a ferritic steel pipe containing a butt weld is also presented.
G.Hilson M.C.J.Parsley D.J.Smith P.E.J.Flewitt
Interface Analysis Centre, University of Bristol, 121 St. Michael’s Hill, Bristol BS2 8BS, U.K. Department of Mechanical Engineering, University of Bristol. Interface Analysis Centre, University of Bristol, 121 St. Michael’s Hill, Bristol BS2 8BS, U.K.;H.H.
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）