Eur. Phys. J. Appl. Phys.
Volume 43, Number 3, September 2008
Topical Issue ITFPC (Innovations on Thin Films Processing and Characterisation)
|Page(s)||327 - 331|
|Section||Protective Applications of Thin Films|
|Published online||30 April 2008|
Mechanism of surface modifications on a NiTi alloy treated with low energy high current pulsed electron beam
Laboratoire d'Étude des Textures et Applications aux Matériaux (LETAM), UMR-CNRS 7078, Université Paul Verlaine, Metz, Ile du Saulcy, 57045 Metz, France
2 State Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Dalian 116024, P.R. China
3 Laboratoire de Physique des Matériaux (LPM), UMR-CNRS 7556, École des Mines, Parc de Saurupt, 54042 Nancy, France
Corresponding author: email@example.com
Revised: 27 February 2008
Accepted: 3 March 2008
Published online: 30 April 2008
A NiTi shape memory alloy was subjected to low energy high current pulsed electron beam (LEHCPEB) irradiation. The samples were treated with the same electron beam parameters and increasing number of pulses. The treatment induces superfast melting, evaporation and rapid solidification at the top surface. As a result of selective evaporation of Ni, the Ti content was increased in the melted layer of the 5 pulse treated sample. However, for the 10 pulsed sample, a part of the vapor condensed on the surface. It is shown also that in the sub-surface, below the melted layer, the martensitic transformation was triggered due to the effects of the thermal stresses and shock waves propagating in the material.
PACS: 81.65.-b – Surface treatments / 61.82.Bg – Metals and alloys / 64.70.dj – Melting of specific substances
© EDP Sciences, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.