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On the validity of Hall-Petch equation for single-phase beta Ti-Al-Nb alloys undergoing stress-induced martensitic transformation

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Title On the validity of Hall-Petch equation for single-phase beta Ti-Al-Nb alloys undergoing stress-induced martensitic transformation
 
Creator PARADKAR, AG
KAMAT, SV
GOGIA, AK
KASHYAP, BP
 
Subject grain-size
mechanical-behavior
tempered martensite
tensile properties
2-phase materials
transient creep
trigger stress
carbon-steels
microstructure
toughness
ti-al-nb alloys
stress-induced martensitic transformation (simt)
yield strength
hall-petch relationship
 
Description The yield strengths of Ti-Al-Nb alloys, which undergo stress-induced martensitic transformation, prior to the onset of plastic deformation during tensile testing, were found to obey the Hall-Petch relationship with grain size. The overall friction stress (sigma(oc)(i)) was observed to decrease with increase in Nb content while it remained more or less unchanged with increase in Al content in these alloys. On the other hand, the overall k(y)(oc), the unpinning constant, which is an index of the efficiency of boundaries as obstacle to dislocation motion, was found to increase with increase in Nb and decrease with increase in Al content in these alloys. (C) 2009
 
Publisher ELSEVIER SCIENCE SA
 
Date 2011-07-28T14:52:24Z
2011-12-26T12:59:45Z
2011-12-27T05:52:33Z
2011-07-28T14:52:24Z
2011-12-26T12:59:45Z
2011-12-27T05:52:33Z
2009
 
Type Article
 
Identifier MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 520(1-2), 168-173
0921-5093
http://dx.doi.org/10.1016/j.msea.2009.05.041
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7430
http://hdl.handle.net/10054/7430
 
Language en