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Role of coarse intermetallic particles on the environmentally assisted cracking behavior of peak aged and over aged Al-Zn-Mg-Cu-Zr alloy during slow strain rate testing

DSpace at IIT Bombay

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Title Role of coarse intermetallic particles on the environmentally assisted cracking behavior of peak aged and over aged Al-Zn-Mg-Cu-Zr alloy during slow strain rate testing
 
Creator KANNAN, MB
RAJA, VS
 
Subject stress-corrosion cracking
aluminum-alloys
microstructure
susceptibility
 
Description Coarse intermetallic particles (larger than 1 mu m in size) in Al-Zn-Mg-Cu-Zr (7010) alloy were found to significantly influence the crack initiation of the over aged alloy while not affecting the more susceptible peak aged alloy, when subjected to slow strain rate testing (SSRT) in 3.5% NaCl solution. A detailed study was undertaken to examine the causes of such an observation. The study shows that the galvanic action and/or dealloying of the coarse intermetallic particles are responsible for the crack initiation in the over aged alloy. However, this phenomenon is not seen in the peak aged alloy due to its inherent environmentally assisted cracking (EAC) susceptibility and the consequent failure in shorter duration, before the coarse particles can exert an influence.
 
Publisher SPRINGER
 
Date 2011-08-29T17:59:24Z
2011-12-26T12:58:42Z
2011-12-27T05:49:06Z
2011-08-29T17:59:24Z
2011-12-26T12:58:42Z
2011-12-27T05:49:06Z
2007
 
Type Article
 
Identifier JOURNAL OF MATERIALS SCIENCE, 42(14), 5458-5464
0022-2461
http://dx.doi.org/10.1007/s10853-006-0784-2
http://dspace.library.iitb.ac.in/xmlui/handle/10054/12153
http://hdl.handle.net/10054/12153
 
Language en