Ultrasonic Stress Measurement in Welded Component by Using Lcr Waves: Analysis of the Microstructure Effect

Abstract:

Article Preview

Welding, which is a largely used process in the mechanical manufacturing, well known to induce high-level residual stresses. The level of residual stresses is of great importance for the lifetime of welded components used in mechanical engineering industry. The use of the ultrasonic method for the evaluation of the residual stresses is based on the acoustoelastic effect, which refers to the change in velocity of the acoustic waves propagating in a strained solid. In the case of welding, the microstructure modifications observed in the heat affected zone (HAZ) and the melted zone (MZ) also induce variations of the velocity of the acoustic waves. The superposition of the two effects, stresses and microstructure, results in over-estimating the levels of stresses. This work which was completed in collaboration with CETIM is a contribution to this problem. The experimental study was carried out on P460HLE and P265 steels welded sheets. The results obtained by the ultrasonic Lcr wave technique were compared with those obtained by the hole drilling technique. This work confirms the possibility of evaluating the residual stresses induced by welding using the ultrasonic method.

Info:

Periodical:

Materials Science Forum (Volumes 524-525)

Edited by:

W. Reimers and S. Quander

Pages:

453-458

DOI:

10.4028/www.scientific.net/MSF.524-525.453

Citation:

H. Qozam et al., "Ultrasonic Stress Measurement in Welded Component by Using Lcr Waves: Analysis of the Microstructure Effect", Materials Science Forum, Vols. 524-525, pp. 453-458, 2006

Online since:

September 2006

Export:

Price:

$35.00

[1] D. E. Bray: Current directions of Ultrasonic Stress Measurement Techniques (15th WCNDT, Rome 2000), paper n°647.

[2] H. Walaszek, H.P. Lieurade, C. Peyrac, J. Hoblos, J. Rivenez: Potentialities of ultrasonics for evaluating residual stresses: Influence of microstructure (Journal of Pressure Vessel Technology, Vol. 124, August 2002), pp.349-353.

DOI: 10.1115/1.1490931

[3] H. Walaszek, J. Hoblos, G. Bourse, C. Robin: Effect of microstructure on ultrasonic measurements of residual stresses in welded joint (6th European Conference on Residual Stresses, Coimbra, Portugal, 10-13 July 2002).

DOI: 10.4028/www.scientific.net/msf.404-407.875

[4] J. Hoblos, G. Bourse and C. Robin, H. Walaszek: Ultrasonic stress in welded joints by using Lcr Waves: An approach to separate microstructure and stress effects (WCU2003, 7-10 September, Paris, France), pp.701-704.

DOI: 10.4028/0-87849-414-6.453

[5] T. D. Murnaghan: Finite Deformation of an elastic solid (John Wiley, New York 1951).

[6] D. S. Hughes and J. L. Kelly: Second-order elastic deformation of solids (Phys. Rev 925. 1953), pp.1145-1149.

[7] D.M. Egle and D.E. Bray: Measurement of acoustoelastic and third-order elastic constants for rail steel (the Acoustical Society of America 1976).

In order to see related information, you need to Login.