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Mechanism of femtosecond laser ablation NiTi shape memory alloy

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Accession number:
20143900069887
Title: Mechanism of femtosecond laser ablating NiTi shape memory alloy
Authors: Tang, Yibo1 Email author tyb19880810@sina.com.cn; Chen, Bing2; Chen, Zhiyong1; Zhu, Weihua1; Li, Yuehua1; Wang, Xinlin1, 2 Email author wxl_ly000@yahoo.com.cn
Author affiliation: 1 Department of Electrical Engineering, University of South China, Hengyang, China
2 Department of Mechanical Engineering, University of South China, Hengyang, China
Corresponding author: Wang, Xinlin
Source title: Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams
Abbreviated source title: Qiangjiguang Yu Lizishu
Volume: 26
Issue: 9
Issue date: September 1, 2014
Publication year: 2014
Article number: 091025
Language: Chinese
ISSN: 10014322
CODEN: QYLIEL
Document type: Journal article (JA)
Publisher: Editorial Office of High Power Laser and Particle Beams
Abstract: The mechanism of femtosecond (fs) laser ablating B2 NiTi alloy have been investigated by the molecular dynamic simulations combined with the two-temperature model. A series of simulations have been conducted, in which, the laser used is 800 nm in central wavelength, 100 fs in pulse duration, and from 25 mJ/cm2 to 50 mJ/cm2 at fluence. The target is 90 nm in depth. The fluence threshold for 100 fs pulsed laser ablating NiTi shape memory alloy is determined, and it is found that the target irradiated by threshold fluence is ablated wholly due to the tensile and the heat induced phase change area is the smallest. When the fluence is improved, the phase change area expanded.
Number of references: 19
Main heading: Pulsed lasers
Controlled terms: Ablation  -  Alloys  -  Computer simulation  -  Laser ablation  -  Molecular dynamics  -  Phase change memory  -  Shape memory effect  -  Titanium alloys  -  Ultrafast lasers  -  Ultrashort pulses
Uncontrolled terms: Central wavelength  -  Femtosecond (fs) laser  -  Fluence thresholds  -  Induced phase change  -  Molecular dynamics simulations  -  NiTi alloys  -  NiTi shape memory alloys  -  Two Temperature Model
Classification code: 531.1 Metallurgy -  542.3 Titanium and Alloys -  641.2 Heat Transfer -  723.5 Computer Applications -  744.1 Lasers, General -  801.4 Physical Chemistry -  951 Materials Science
DOI: 10.11884/HPLPB201426.091025
Database: Compendex

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2樓2015-09-14 11:30:26