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Summary: JOURNAL OF MATERIALS SCIENCE 40 (2005) 2833 2836
Nucleation of stress-induced martensites
in a Ti/Mo-based alloy
L. C. ZHANG, T. ZHOU, M. AINDOW, S. P. ALPAY, M. J. BLACKBURN
Department of Materials Science and Engineering, Institute of Materials Science,
University of Connecticut, Storrs, CT 06269-3136, USA
E-mail: m.aindow@uconn.edu
M. H. WU
Memry Corporation, Bethel, CT 06801, USA
The formation of stress-induced martensite in a metastable Ti-Mo-based alloy has
been studied using X-ray diffraction and transmission electron microscopy. The martensite
nucleates heterogeneously at pre-existing sub-grain boundaries by dissociation of the
boundary dislocations which bow out on inclined planes. The growth of martensite laths
from the resultant stacking faults occurs by the motion of interfacial disconnections: the
steps at the cores of these defects account for the apparent discrepancy between the {112}
glide plane for the initial partial dislocation and the {334} habit plane for the martensite
laths. C 2005 Springer Science + Business Media, Inc.
1. Introduction
The -Ti alloys are an important class of structural ma-
terials because they exhibit an attractive combination
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