EBSD-assisted fractographic analysis of crack paths in magnesium alloy
##plugins.themes.bootstrap3.article.sidebar##
##plugins.themes.bootstrap3.article.main##
Abstract
Magnesium (Mg) alloys are attractive as structural materials due to their light weight and high specific strength. It is well known that Mg alloy has hexagonal close-packed (HCP) structure and only basal slip
or twinning can operate during plastic deformation because critical resolved shear stresses of the other slip
systems such as pyramidal or prismatic slips are much higher than the basal slip. Thus sometimes characteristic
fracture surfaces are formed during stress corrosion cracking (SCC) or fatigue crack propagation (FCP) in Mg
alloys, where many parallel lines are formed. These lines are different from so-called fatigue striations, because
they are formed even under sustained load condition of SCC. Consequently, electron back scattered diffraction
(EBSD) technique was applied on the fracture surface, and the formation mechanism of parallel lines was
investigated. EBSD-assisted fractography had revealed that the characteristic parallel lines were formed due to
the operation of basal slips, not twining. It is considered that hydrogen-enhanced localized plasticity (HELP)
mechanism had been activated under corrosive environment.
Downloads
##plugins.themes.bootstrap3.article.details##
How to Cite
Copyright
Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.
Open Access Statement
Frattura ed Integrità Strutturale (Fracture and Structural Integrity, F&SI) is an open-access journal which means that all content is freely available without charge to the user or his/her institution. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles in this journal without asking prior permission from the publisher or the author. This is in accordance with the DOAI definition of open access.
F&SI operates under the Creative Commons Licence Attribution 4.0 International (CC-BY 4.0). This allows to copy and redistribute the material in any medium or format, to remix, transform and build upon the material for any purpose, even commercially, but giving appropriate credit and providing a link to the license and indicating if changes were made.