Content area
Abstract
Temperature dependence of tensile properties ofTi–47Al–2Mn–2Nb–0.8TiB2 alloy was investigated andbrittle-to-ductile transition temperature (TBD) wasevaluated accordingly within the strain rate range from 10−5 to10−1 s−1. TBD and its strain rate sensitivity in Ti-47Al-2Mn-2Nb-0.8TiB2 alloy were compared withthose in Ti-47Al-2Mn-2Nb alloy. It is found that theminor addition of 1.0 at% boron reduces TBD by more than100 K and that TBD in both alloys shows a positivesensitivity to the strain rate. But the B-doped alloy has a lower BDTactivation energy (256 kJ/mol) than that of B-free alloy(324 kJ/mol). The effect of boron on TBD and its strain ratesensitivity is attributed to the reduction in the grain size.
Details
Title
The effect of boron addition on brittle-to-ductile transition temperature and its strain rate sensitivity in gamma titanium aluminide
Author
Wang, Yu 1 ; Lin, Dongliang 1 ; Law, Chi C 2
1 Open Laboratory of Education Ministry of China for High-Temperature Materials and Tests, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China
2 Materials & Mechanics Engineering, United Technologies–Pratt & Whitney, East Hartford, Connecticut, USA
1 Open Laboratory of Education Ministry of China for High-Temperature Materials and Tests, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China
2 Materials & Mechanics Engineering, United Technologies–Pratt & Whitney, East Hartford, Connecticut, USA
Pages
3083-3087
Publication year
2000
Publication date
Jun 2000
ISSN
00222461
e-ISSN
15734803
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2259893215
Copyright
Journal of Materials Science is a copyright of Springer, (2000). All Rights Reserved.