Modeling of ultrasonic fields radiated by contact transducer in a component of irregular surface

Lhémery, Alain; Calmon, Pierre; Chatillon, Sylvain; Gengembre, Nicolas

doi:10.1016/s0041-624x(02)00143-9

Cited by 32 publications

(25 citation statements)

References 4 publications

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“…However, it is slightly sensitive to the microstructure effects like grain size [2], carbon rate [3], texture [4], and structure [5] and also to the operating conditions (temperature [6], coupling [7], etc.). The ultrasonic evaluation of the residual stresses requires the division between the microstructure and the acoustoelastic effects which are simultaneously reasons of changing in ultrasonic properties of the structure materials.…”

Section: Introductionmentioning

confidence: 99%

Using finite element and ultrasonic method to evaluate welding longitudinal residual stress through the thickness in austenitic stainless steel plates

2013

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a b s t r a c tThis paper uses a 3D thermo-mechanical finite element analysis to evaluate welding residual stresses in austenitic stainless steel plates of AISI 304L. The finite element model has been verified by the hole drilling method. The validated finite element (FE) model is then compared with the ultrasonic stress measurement based on acoustoelasticity. This technique uses longitudinal critically refracted (L CR ) waves that travel parallel to the surface within an effective depth. The residual stresses through the thickness of plates are evaluated by four different series (1 MHz, 2 MHz, 4 MHz and 5 MHz) of transducers. By combining FE and L CR method (known as FEL CR method) a 3D distribution of residual stress for the entire of the welded plate is presented. To find the acoustoelastic constant of the heat affected zone (HAZ), a metallographic investigation is done to reproduce HAZ microstructure in a tensile test sample. It has been shown that the residual stresses through the thickness of stainless steel plates can be evaluated by FEL CR method.

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Section: Introductionmentioning

confidence: 99%

Using finite element and ultrasonic method to evaluate welding longitudinal residual stress through the thickness in austenitic stainless steel plates

2013

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“…However, it is slightly sensitive to the microstructure effects (grains size [1], [2], [3], carbon rate [4], [5], texture [6], [7], [8], [9], and structure [10], [11], [12]) and to the operating conditions (temperature [13], [14], coupling [15], [16], etc.). The ultrasonic estimation of the residual stresses requires separation between the microstructure and the acoustoelastic effects.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Measurement of Hoop Residual Stress in Stainless Steel Pipes

Javadi¹

2013

MIE

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“…However, it is rather sensitive to the microstructure effects (grains size [2][3][4], carbon rate [5,6], texture [7][8][9][10], and structure [11][12][13]) and to the operating conditions (temperature [14,15], coupling [16,17], etc.). The ultrasonic evaluation of the residual stresses requires separation between the microstructure and the acoustoelastic effects.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Effect on the Lcr Elastic Wave for Welding Residual Stress Measurement

et al. 2009

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The ultrasonic residual stresses measurement is based on the acoustoelastic effect that refers to the change in velocity of the elastic waves when propagating in a stressed media. The experimental method using the longitudinal critically refracted (Lcr) waves requires an acoustoelastic calibration and an accuracy measurement of the time-of-flight on both stressed and unstressed media. The accuracy of this method is strongly related to that of the calibration parameters, namely the time-offlight at free stress condition (t 0 ) and the acoustoelastic coefficient (K). These parameters should be obtained on a free stress sample that has an identical microstructure to that of the stressed media. Our study concerns the ultrasonic evaluation of the welding residual stresses. This assembly process induces three distinct microstructures in the weld seam: the melted zone (MZ), heat affected zone (HAZ) and the parent metal (PM). Previously, the residual stresses evaluation in the steel welded plates, by the use of the Lcr wave method, was only possible in the MZ and in the PM zones. While in the HAZ, the residual stresses were incorrectly evaluated due to its small width impeding the extraction of the calibration sample. In this paper, we propose an original approach to solve this problem, which consists of reproducing the microstructure of this zone using a specific heat treatment. For the experimental part, P355 steel welded plates were used and the three zones were probed. The results compared with those obtained by the hole-drilling reference method show a proven potential of the ultrasonic method using the Lcr waves. The Lcr wave residual stresses measurements were made with sufficient accuracy, such as the variability of repeated measures was estimated on the order of ± 36 MPa.

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Modeling of ultrasonic fields radiated by contact transducer in a component of irregular surface

Cited by 32 publications

References 4 publications

Using finite element and ultrasonic method to evaluate welding longitudinal residual stress through the thickness in austenitic stainless steel plates

Using finite element and ultrasonic method to evaluate welding longitudinal residual stress through the thickness in austenitic stainless steel plates

Ultrasonic Measurement of Hoop Residual Stress in Stainless Steel Pipes

Microstructure Effect on the Lcr Elastic Wave for Welding Residual Stress Measurement

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