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Real‐Time Visualisation of the Portevin–Le Chatelier Effect With Mechanoluminescent‐Sensing Film
Author(s) -
Li C.,
Xu C. N.,
Imai Y.,
Bu N.
Publication year - 2011
Publication title -
strain
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.477
H-Index - 47
eISSN - 1475-1305
pISSN - 0039-2103
DOI - 10.1111/j.1475-1305.2009.00713.x
Subject(s) - mechanoluminescence , portevin–le chatelier effect , materials science , tensile testing , optics , alloy , composite material , ultimate tensile strength , acoustics , optoelectronics , dynamic strain aging , physics , phosphor
The use of the mechanoluminescence (ML) technique to directly observe the Portevin–Le Chatelier (PLC) effect is described. A uniaxial tensile test of an aluminium alloy plate coated with SrAl 2 O 4 : Eu 2+ (SAOE) ML‐sensing film was performed, and a high‐speed camera recorded ML images simultaneously. Strong ML light in response to the PLC bands was emitted from the coated SAOE ML‐sensing film and could be seen clearly with the naked eye. The position, the slope angle of the band front and propagation velocity of the PLC bands were measured directly from the ML images. Momentary interplay between two face‐to‐face propagating PLC bands was observed and captured in the ML images. The results show that real‐time visualisation of the PLC effect was achieved using this ML technique.