TY - GEN
T1 - Nanosecond time-resolved thermo-acoustics in refractory metals undergoing laser pulse-induced phase transition
T2 - 2014 IEEE International Ultrasonics Symposium, IUS 2014
AU - Veres, Istvan A.
AU - Utegulov, Zhandos N.
AU - Every, Arthur E.
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/10/20
Y1 - 2014/10/20
N2 - The presented work investigates the metal-to-liquid phase transition induced by a nanosecond pulsed-laser. The generation and propagation of the elastic waves by the surface thermal source is described by the coupled heat conduction and elastic wave equations and solved using a numerical finite difference time domain (FDTD) technique. During laser-induced melting the molten mass loses its rigidity and the generation of the shear waves is significantly influenced by a shallow melt pool, while the propagation of longitudinal waves remains less influenced. Numerical simulations are carried out to investigate the possibility to detect laser-induced melting in tungsten by utilizing this effect. In particular, the arrival of the shear waves in the epicentral wave form is monitored to detect the presence of molten material.
AB - The presented work investigates the metal-to-liquid phase transition induced by a nanosecond pulsed-laser. The generation and propagation of the elastic waves by the surface thermal source is described by the coupled heat conduction and elastic wave equations and solved using a numerical finite difference time domain (FDTD) technique. During laser-induced melting the molten mass loses its rigidity and the generation of the shear waves is significantly influenced by a shallow melt pool, while the propagation of longitudinal waves remains less influenced. Numerical simulations are carried out to investigate the possibility to detect laser-induced melting in tungsten by utilizing this effect. In particular, the arrival of the shear waves in the epicentral wave form is monitored to detect the presence of molten material.
UR - http://www.scopus.com/inward/record.url?scp=84910025452&partnerID=8YFLogxK
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U2 - 10.1109/ULTSYM.2014.0617
DO - 10.1109/ULTSYM.2014.0617
M3 - Conference contribution
AN - SCOPUS:84910025452
T3 - IEEE International Ultrasonics Symposium, IUS
SP - 2474
EP - 2477
BT - IEEE International Ultrasonics Symposium, IUS
PB - IEEE Computer Society
Y2 - 3 September 2014 through 6 September 2014
ER -