Estimation of Grain Orientation in an Anisotropic Weld by Using a Model of Ultrasonic Propagation in an Inverse Scheme
Journal article, 2014

The initial step towards a nondestructive technique that estimates grain orientation in an anisotropic weld is presented in this paper. The purpose is to aid future forward simulations of ultrasonic NDT of this kind of weld to achieve a better result. A forward model that consists of a weld model, a transmitter model, a receiver model, and a 2D ray tracing algorithm is introduced. An inversion based on a multiobjective genetic algorithm is also presented. Experiments are conducted for both P and SV waves in order to collect enough data used in the inversion. Calculation is conducted to fulfill the estimation with both the synthetic data and the experimental data. Concluding remarks are presented at the end of the paper.

grain orientation

ultrasonic NDT

multi-objective genetic algorithm

austenitic weld


Qingwei Liu

Chalmers, Materials and Manufacturing Technology, Advanced Non-destructive Testing

Håkan Wirdelius

Chalmers, Materials and Manufacturing Technology, Advanced Non-destructive Testing

Modelling and Simulation in Engineering

1687-5591 (ISSN) 1687-5605 (eISSN)

Vol. 2014 11-

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Applied Mechanics

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