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Environmentally assisted cracking behaviour of Al-Zn-Mg-Cu-Cr alloy bonded with polymer matrix composite stiffener

DSpace at IIT Bombay

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Title Environmentally assisted cracking behaviour of Al-Zn-Mg-Cu-Cr alloy bonded with polymer matrix composite stiffener
 
Creator KALE, SS
RAJA, VS
BAKARE, AK
 
Subject Aluminium
Polymer
Stress corrosion
Crevice corrosion
STRESS-CORROSION CRACKING
ALUMINUM-ALLOYS
LOCALIZED CORROSION
OCCLUDED CELL
ZR ALLOY
SUSCEPTIBILITY
AEROSPACE
REPAIR
 
Description Studies were conducted to investigate the effect of polymer matrix composite stiffener (patch) on environmentally assisted cracking (EAC) susceptibility of pre-cracked alclad Al-Zn-Mg-Cu-Cr alloy in 3.5 wt.% NaCl environment. The EAC threshold stress intensity of the peak and two-step aged alloy was reduced from 26 to 7 MPa m(1/2) and 31to 8 MPa m(1/2) respectively under the influence of patch. The plateau crack velocity was increased from 2.5 x 10(-9) to 5.1 x 10(-9) m/s for peak aged and 1.2 x 10(-9) to 2.0 x 10(-9) m/s for two-step aged tempers in patched condition. The significant increase in EAC susceptibility was attributed to crevice effect generated by the stiffener. (C) 2013 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-10-16T07:08:12Z
2014-10-16T07:08:12Z
2013
 
Type Article
 
Identifier CORROSION SCIENCE, 75318-325
http://dx.doi.org/10.1016/j.corsci.2013.06.015
http://dspace.library.iitb.ac.in/jspui/handle/100/15513
 
Language en