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Hydrogen embrittlement studies of aged and retrogressed-reaged Al-Zn-Mg alloys

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Field Value
 
Title Hydrogen embrittlement studies of aged and retrogressed-reaged Al-Zn-Mg alloys
 
Creator THAKUR, A
RAMAN, R
MALHOTRA, SN
 
Subject stress-corrosion cracking
aluminum-alloys
li alloy
he
eic
rra
hydrogen charging
 
Description The hydrogen embrittlement (HE) of Al-4.35Zn-1.4Mg-0.059Zr alloys in different artificial aging tempers and after retrogression and reaging (RRA) treatments has been investigated by tensile testing hydrogen precharged specimens. The, influence of RRA and hydrogen charging on the dislocation structure was studied by TEM. The under-aged temper was the most susceptible while the over-aged temper was the most resistant to HE. The RRA treatment improved the HE resistance of all the tempers. This has been attributed to the reduction in dislocation density upon retrogression and reaging. Flat fractography features near the surface of the hydrogen charged specimen have been correlated to the depth of hydrogen penetration. The hydrogen dislocation interaction and hydride cracking mechanism of HE have been addressed. (c) 2006
 
Publisher ELSEVIER SCIENCE SA
 
Date 2011-07-28T09:16:37Z
2011-12-26T12:58:49Z
2011-12-27T05:49:25Z
2011-07-28T09:16:37Z
2011-12-26T12:58:49Z
2011-12-27T05:49:25Z
2007
 
Type Article
 
Identifier MATERIALS CHEMISTRY AND PHYSICS, 101(40604), 441-447
0254-0584
http://dx.doi.org/10.1016/j.matchemphys.2006.08.004
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7361
http://hdl.handle.net/10054/7361
 
Language en