期刊论文

Li, Hui;Shen, SN

英文

OPTICS AND LASER TECHNOLOGY

0030-3992

2024

169

110030

10.1016/j.optlastec.2023.110030

This work studied the LU detection of four typical LPBF alloys with internal artificial defects, combined with numerical simulation and experimental methods. First, the excitation and propagation of different forms of ultrasonic waves in the thermo-elastic regime are studied by numerical simulations. The simulation results show that different forms of excited ultrasonic waves have different propagation directions. The amplitude of L wave at the defect is the largest in AlSi10Mg alloy, and the

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In the development of additive manufacturing (AM) technology, laser powder bed fusion (LPBF) is one of the important processing methods. However, the hole defects in the fabricated samples limit the development. Laser ultrasonic (LU) technology plays a major role in the detection of LPBF parts with tiny defects, which has the advantages of non-contact and non-destructive. In this work, the detection of submillimeter internal defects in four typical LPBF alloys by LU technology is studied numerically and experimentally. A multiphysics simulation model of LU detection is established to investiga...