Localized detection of phase transition in tungsten by laser ultrasonics

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dc.contributor.author	Utegulov, Z.N.
dc.contributor.author	Reese, S.J.
dc.contributor.author	Farzbod, F.
dc.contributor.author	Schley, R.S.
dc.contributor.author	Hurley, D.H.
dc.date.accessioned	2015-11-03T04:25:41Z
dc.date.available	2015-11-03T04:25:41Z
dc.date.issued	2013
dc.identifier.uri	http://nur.nu.edu.kz/handle/123456789/672
dc.description.abstract	We demonstrated a method for localized, furnace-free detection of the onsets of melting and ablation in polycrystalline tungsten using nanosecond laser ultrasonics. Pulsed laserinduced melting is characterized by a delay in the arrival of the shear wave with increasing laser peak intensity. Pulse-laser induced ablation was characterized by pronounced increase of the amplitude of the signal associated with the arrival of longitudinal acoustic wave. Both phenomena are attributed to a change in character of the ultrasonic source. The described technique suggests a new spatially resolved method for detection of metal-to-melt phase transition in refractory metals.	ru_RU
dc.language.iso	en	ru_RU
dc.publisher	Nazarbayev University	ru_RU
dc.subject	first research week	ru_RU
dc.subject	innovative scientific research	ru_RU
dc.subject	laser irradiation	ru_RU
dc.title	Localized detection of phase transition in tungsten by laser ultrasonics	ru_RU
dc.type	Abstract	ru_RU