Abstract
Twins in 9R martensite in Ti50.0Pd43.0Fe7.0 shape memory alloy are investigated by conventional transmission electron microscopy. There are four twinning modes, i.e., {114}9R Type I, 〈591〉9R Type II, {105}9R compound and {001}9R compound twins. The {114}9R Type I and the 〈591〉9R Type II twins are considered to be lattice invariant shear in the 9R martensite continuously coexisting with 2H martensite. On the other hand, those two twins and {105}9R compound twin can be regarded as variant accommodation twins in the region only consisting of the 9R martensite. Irrational nature of Type II twin boundary, i.e., A:B type pair, is also observed in the edge-on state by high resolution electron microscopy (HREM). The boundary is gradually and randomly curved with strain contrast.
| Original language | English |
|---|---|
| Pages (from-to) | 549-554 |
| Number of pages | 6 |
| Journal | Scripta Materialia |
| Volume | 46 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Apr 1 2002 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
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Crystallography and morphology of twins in 9R martensite in Ti-Pd-Fe shape memory alloy. / Ii, S.; Nishida, Minoru; Hara, T.
In: Scripta Materialia, Vol. 46, No. 7, 01.04.2002, p. 549-554.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Crystallography and morphology of twins in 9R martensite in Ti-Pd-Fe shape memory alloy
AU - Ii, S.
AU - Nishida, Minoru
AU - Hara, T.
PY - 2002/4/1
Y1 - 2002/4/1
N2 - Twins in 9R martensite in Ti50.0Pd43.0Fe7.0 shape memory alloy are investigated by conventional transmission electron microscopy. There are four twinning modes, i.e., {114}9R Type I, 〈591〉9R Type II, {105}9R compound and {001}9R compound twins. The {114}9R Type I and the 〈591〉9R Type II twins are considered to be lattice invariant shear in the 9R martensite continuously coexisting with 2H martensite. On the other hand, those two twins and {105}9R compound twin can be regarded as variant accommodation twins in the region only consisting of the 9R martensite. Irrational nature of Type II twin boundary, i.e., A:B type pair, is also observed in the edge-on state by high resolution electron microscopy (HREM). The boundary is gradually and randomly curved with strain contrast.
AB - Twins in 9R martensite in Ti50.0Pd43.0Fe7.0 shape memory alloy are investigated by conventional transmission electron microscopy. There are four twinning modes, i.e., {114}9R Type I, 〈591〉9R Type II, {105}9R compound and {001}9R compound twins. The {114}9R Type I and the 〈591〉9R Type II twins are considered to be lattice invariant shear in the 9R martensite continuously coexisting with 2H martensite. On the other hand, those two twins and {105}9R compound twin can be regarded as variant accommodation twins in the region only consisting of the 9R martensite. Irrational nature of Type II twin boundary, i.e., A:B type pair, is also observed in the edge-on state by high resolution electron microscopy (HREM). The boundary is gradually and randomly curved with strain contrast.
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U2 - 10.1016/S1359-6462(01)01238-6
DO - 10.1016/S1359-6462(01)01238-6
M3 - Article
AN - SCOPUS:0036533689
VL - 46
SP - 549
EP - 554
JO - Scripta Materialia
JF - Scripta Materialia
SN - 1359-6462
IS - 7
ER -