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EFFECT OF HYDROGEN ON THE IMPACT BEHAVIOR OF AN AUSTENITIC FE-MN-AL ALLOY

DSpace at IIT Bombay

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Field Value
 
Title EFFECT OF HYDROGEN ON THE IMPACT BEHAVIOR OF AN AUSTENITIC FE-MN-AL ALLOY
 
Creator MITTAL, SC
PRASAD, RC
DESHMUKH, MB
 
Subject stress-corrosion cracking
20-percent nacl solution
steels
hydrogen embrittlement
austenitic fe-mn-al steel
impact fracture
 
Description Impact studies on hydrogen precharged and uncharged charpy specimens of Fe-0.45C-17Mn-2.8Al steel were conducted in the temperature range 77 to 300 K. For the uncharged specimens, it was observed that values of total absorbed energy and crack propagation energy decreased with lowering of temperature. The crack initiation energy followed the same trend in the temperature range 77-230 K but decreased with increase of temperature above 230 K. Hydrogen precharging resulted in decrease of these energy values and also the value of dynamic yield stress at all temperatures. Maximum decrease was noted in the temperature range 220-300 K. Analysis of fracture surfaces, using the X-ray diffraction technique (XRD) and scanning electron microscopy (SEM) studies, suggested that the stable austenitic Fe-Mn-Al steel is prone to hydrogen degradation even at low temperatures and high strain rates. These observations are rationalised on the basis of an atomistic model for hydrogen embrittlement which does not essentially require redistribution of hydrogen concentration or martensitic transformation during the test.
 
Publisher IRON STEEL INST JAPAN KEIDANREN KAIKAN
 
Date 2011-08-04T05:20:00Z
2011-12-26T12:54:34Z
2011-12-27T05:42:37Z
2011-08-04T05:20:00Z
2011-12-26T12:54:34Z
2011-12-27T05:42:37Z
1995
 
Type Article
 
Identifier ISIJ INTERNATIONAL, 35(3), 302-308
0915-1559
http://dx.doi.org/10.2355/isijinternational.35.302
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9257
http://hdl.handle.net/10054/9257
 
Language en