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
Authors:	PARADKAR, AG KAMAT, SV GOGIA, AK KASHYAP, BP
Keywords:	grain-size mechanical-behavior tempered martensite tensile properties 2-phase materials transient creep trigger stress carbon-steels microstructure toughness
Issue Date:	2009
Publisher:	ELSEVIER SCIENCE SA
Citation:	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 520(1-2), 168-173
Abstract:	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
URI:	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
ISSN:	0921-5093
Appears in Collections:	Article

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