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The effect of grain size and composition on the fracture toughness of Ti-Al-Nb alloys undergoing stress-induced martensitic transformation

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Title The effect of grain size and composition on the fracture toughness of Ti-Al-Nb alloys undergoing stress-induced martensitic transformation
 
Creator PARADKAR, A
KUMAR, V
KAMAT, SV
GOGIA, AK
KASHYAP, BP
 
Subject titanium aluminide alloy
alpha-2
microstructure
ti-al-nb alloys
stress-induced martensitic transformation (simt)
trigger stress
inherent fracture toughness
fracture toughness enhancement due to simt
 
Description The effect of grain size and composition on the fracture toughness of Ti-Al-Nb alloys in P solution-treated condition was investigated. The fracture toughness of the alloys was found to increase with an increase in grain size initially, reach a maximum and subsequently decrease with further increase in grain size. This trend was attributed primarily to the effect of grain size on the enhancement of fracture toughness due to stress-induced martensitic transformation (SIMT) at the crack tip, which in turn can be related to the effect of grain size on trigger stress for SIMT. Alloys containing higher Al and Nb showed a higher toughness for the same grain size, which was also explained in terms of effect of composition on the trigger stress. (c) 2007
 
Publisher ELSEVIER SCIENCE SA
 
Date 2011-07-29T01:23:19Z
2011-12-26T12:47:41Z
2011-12-27T05:38:32Z
2011-07-29T01:23:19Z
2011-12-26T12:47:41Z
2011-12-27T05:38:32Z
2008
 
Type Article
 
Identifier MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 486(1-2), 273-282
0921-5093
http://dx.doi.org/10.1016/j.msea.2007.10.005
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7541
http://hdl.handle.net/10054/7541
 
Language en