Published October 16, 2006 | Version v1
Journal article Metadata-only

Dissociation of super-dislocations and the stacking fault energy in TiAl based alloys with Nb-doping

Creators

  • 1. Laboratory of Solid State Microstructures, Nanjing University, Han Kou Road 22, Nanjing 210093 (China)
  • 2. Institut fuer Materialphysik der Universitaet Goettingen, Friedrich-Hund-Platz 1, 37077 Goettingen (Germany)

Description

Dissociations of super-dislocations in γ-TiAl in Nb-doped Ti-48 at.% Al-1 at.% Nb and Ti-48 at.% Al-10 at.% Nb have been studied by high resolution transmission electron microscopy (HRTEM) and weak beam transmission electron microscopy (TEM). The SISF energy was calculated to be 63 mJ/m2 in Ti-48 at.% Al-1 at.% Nb and 34 mJ/m2 in Ti-48 at.% Al-10 at.% Nb according to the dissociation width, respectively. Consequently, it is concluded that Nb-addition can decrease the SF energy significantly, which contribute obviously to the strengthening effect induced by Nb-doping

Additional details

Identifiers

DOI
10.1016/j.physleta.2006.05.021;
PII
S0375-9601(06)00742-0;

Publishing Information

Journal Title
Physics Letters. A
Journal Volume
358
Journal Issue
3
Journal Page Range
p. 231-235
ISSN
0375-9601
CODEN
PYLAAG

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
38067181
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ALUMINIUM ALLOYS; DISLOCATIONS; DOPED MATERIALS; INTERMETALLIC COMPOUNDS; NIOBIUM ALLOYS; STACKING FAULTS; TITANIUM ALLOYS; TRANSMISSION ELECTRON MICROSCOPY
Descriptors DEC
ALLOYS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; ELECTRON MICROSCOPY; LINE DEFECTS; MATERIALS; MICROSCOPY; TRANSITION ELEMENT ALLOYS

Optional Information

Copyright
Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.