Abstract
The deformation behavior of binary Ti-Al model alloys (0 to
13at.%) has been observed during compression normal to the
rolling direction with respect to the activity of {1 1 2 2}
compression twins but also the more common {1 1 2 0} tension
twin as well as the rarely seen {1 1 2 1} tension twins. In-situ
neutron diffraction loading experiments and EBSD microstructure
analysis were used to qualify the impact of Al on twinning. The
results show that for the given loading direction and starting
texture,{1 1 2 2} and {1 1 2 0} twinning are similarly common in
commercially pure Ti, while only small additions of Al result in a
dramatic decrease in {1 1 2 2} compression twinning. In contrast,
dramatic reductions of {1 1 2 0} twin fractions are only observed
above 10at.% Al and with an ageing treatment to promote Ti3Al
formation. Al addition until 10at.% makes {1 1 2 1} twinning
more likely, but Ti3Al formation seems to deactivate this twin
system. The role of slip on twinning is discussed.
13at.%) has been observed during compression normal to the
rolling direction with respect to the activity of {1 1 2 2}
compression twins but also the more common {1 1 2 0} tension
twin as well as the rarely seen {1 1 2 1} tension twins. In-situ
neutron diffraction loading experiments and EBSD microstructure
analysis were used to qualify the impact of Al on twinning. The
results show that for the given loading direction and starting
texture,{1 1 2 2} and {1 1 2 0} twinning are similarly common in
commercially pure Ti, while only small additions of Al result in a
dramatic decrease in {1 1 2 2} compression twinning. In contrast,
dramatic reductions of {1 1 2 0} twin fractions are only observed
above 10at.% Al and with an ageing treatment to promote Ti3Al
formation. Al addition until 10at.% makes {1 1 2 1} twinning
more likely, but Ti3Al formation seems to deactivate this twin
system. The role of slip on twinning is discussed.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 13th World Conference on Titanium |
| Editors | Vasisht Venkatesh et al |
| DOIs | |
| Publication status | Published - 2016 |