Effect of Crystal Orientation on Femtosecond Laser-Induced Thermomechanical Responses and Spallation Behaviors of Copper Films

Abstract Ultrafast thermomechanical responses and spallation behaviours of monocrystal copper films irradiated by femtosecond laser pulse are investigated using molecular dynamics simulation (MDS). Films with 〈100〉, 〈110〉 and 〈111〉 crystal orientations along the thickness direction were studied. The...

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Autores principales:	Qi-lin Xiong, Zhenhuan Li, Takayuki Kitamura
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1ded2267984840a1b6df3999a4a0d57b
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spelling	oai:doaj.org-article:1ded2267984840a1b6df3999a4a0d57b2021-12-02T12:32:17ZEffect of Crystal Orientation on Femtosecond Laser-Induced Thermomechanical Responses and Spallation Behaviors of Copper Films10.1038/s41598-017-09559-62045-2322https://doaj.org/article/1ded2267984840a1b6df3999a4a0d57b2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09559-6https://doaj.org/toc/2045-2322Abstract Ultrafast thermomechanical responses and spallation behaviours of monocrystal copper films irradiated by femtosecond laser pulse are investigated using molecular dynamics simulation (MDS). Films with 〈100〉, 〈110〉 and 〈111〉 crystal orientations along the thickness direction were studied. The results show that the crystal orientation has a significant effect on femtosecond laser-induced thermomechanical responses and spallation behaviors of monocrystal copper films. The discrepancy between normal stresses in copper films with different crystal orientation leads to distinct differences in lattice temperature. Moreover, the copper films with different crystal orientations present distinct spallation behaviors, including structural melting (atomic splashing) and fracture. The melting depth of 〈100〉 copper film is lower than that of 〈110〉 and 〈111〉 copper films for the same laser intensity. The dislocations and slip bands are formed and propagate from the solid-liquid interface of 〈110〉 and 〈111〉 copper films, while these phenomena do not appear in 〈100〉 copper film. Additionally, numerous slip bands are generated in the non-irradiated surface region of copper films due to reflection of mechanical stress. These slip bands can finally evolve into cracks (nanovoids) with time, which further result in the fracture of the entire films.Qi-lin XiongZhenhuan LiTakayuki KitamuraNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-14 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Qi-lin Xiong Zhenhuan Li Takayuki Kitamura Effect of Crystal Orientation on Femtosecond Laser-Induced Thermomechanical Responses and Spallation Behaviors of Copper Films
description	Abstract Ultrafast thermomechanical responses and spallation behaviours of monocrystal copper films irradiated by femtosecond laser pulse are investigated using molecular dynamics simulation (MDS). Films with 〈100〉, 〈110〉 and 〈111〉 crystal orientations along the thickness direction were studied. The results show that the crystal orientation has a significant effect on femtosecond laser-induced thermomechanical responses and spallation behaviors of monocrystal copper films. The discrepancy between normal stresses in copper films with different crystal orientation leads to distinct differences in lattice temperature. Moreover, the copper films with different crystal orientations present distinct spallation behaviors, including structural melting (atomic splashing) and fracture. The melting depth of 〈100〉 copper film is lower than that of 〈110〉 and 〈111〉 copper films for the same laser intensity. The dislocations and slip bands are formed and propagate from the solid-liquid interface of 〈110〉 and 〈111〉 copper films, while these phenomena do not appear in 〈100〉 copper film. Additionally, numerous slip bands are generated in the non-irradiated surface region of copper films due to reflection of mechanical stress. These slip bands can finally evolve into cracks (nanovoids) with time, which further result in the fracture of the entire films.
format	article
author	Qi-lin Xiong Zhenhuan Li Takayuki Kitamura
author_facet	Qi-lin Xiong Zhenhuan Li Takayuki Kitamura
author_sort	Qi-lin Xiong
title	Effect of Crystal Orientation on Femtosecond Laser-Induced Thermomechanical Responses and Spallation Behaviors of Copper Films
title_short	Effect of Crystal Orientation on Femtosecond Laser-Induced Thermomechanical Responses and Spallation Behaviors of Copper Films
title_full	Effect of Crystal Orientation on Femtosecond Laser-Induced Thermomechanical Responses and Spallation Behaviors of Copper Films
title_fullStr	Effect of Crystal Orientation on Femtosecond Laser-Induced Thermomechanical Responses and Spallation Behaviors of Copper Films
title_full_unstemmed	Effect of Crystal Orientation on Femtosecond Laser-Induced Thermomechanical Responses and Spallation Behaviors of Copper Films
title_sort	effect of crystal orientation on femtosecond laser-induced thermomechanical responses and spallation behaviors of copper films
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/1ded2267984840a1b6df3999a4a0d57b
work_keys_str_mv	AT qilinxiong effectofcrystalorientationonfemtosecondlaserinducedthermomechanicalresponsesandspallationbehaviorsofcopperfilms AT zhenhuanli effectofcrystalorientationonfemtosecondlaserinducedthermomechanicalresponsesandspallationbehaviorsofcopperfilms AT takayukikitamura effectofcrystalorientationonfemtosecondlaserinducedthermomechanicalresponsesandspallationbehaviorsofcopperfilms
_version_	1718394082525446144

Effect of Crystal Orientation on Femtosecond Laser-Induced Thermomechanical Responses and Spallation Behaviors of Copper Films

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