Potentialities of Ultrasonics for Evaluating Residual Stresses: Influence of Microstructure
H. Walaszek, H. Lieurade, C. Peyrac; CETIM, France
ABSTRACT
The good control of residual stress level in mechanical components is an important factor, particularly for a good fatigue-strength of these components. This paper presents advances obtained at CETIM in the field of development of an ultrasonic method for stress measurements. This method is potentially advantageous by its non-destructivity, its good portability on site, and its relative easiness for operation. In the paper are discussed the results obtained with ultrasonics on steel welded plate, and a comparison is made with stress measurement obtained by incremental hole drilling method, and X-Ray diffraction. These results are also validated by thermal relaxation of the plates. The paper discusses also the microstructure influence on ultrasonic measurements and the precision obtained. In conclusion is emphasised the interest for studying the ability of the ultrasonic residual stress measurement method in different industrial cases. Keywords: Non-destructive measurement - ultrasonic measurement - subsurface wave - acoustoelastic coefficient - residual stresses - microstructure - welded plate.
Publication Source: 3nd International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components, November 14-16, 2001, Seville Spain. Publisher: Tecnatom s.a. - [Homepage]
