Crystallography and morphology of twins in 9R martensite in Ti-Pd-Fe shape memory alloy

S. Ii, Minoru Nishida, T. Hara

Research output: Contribution to journalArticle

6 Citations (Scopus)

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 languageEnglish
Pages (from-to)549-554
Number of pages6
JournalScripta Materialia
Volume46
Issue number7
DOIs
Publication statusPublished - Apr 1 2002
Externally publishedYes

Fingerprint

Crystallography
shape memory alloys
martensite
Shape memory effect
Martensite
crystallography
High resolution electron microscopy
Twinning
accommodation
twinning
electron microscopy
shear
Transmission electron microscopy
transmission electron microscopy
high resolution

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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 journalArticle

@article{96dc4a45bacb46b2b96852019553affa,
title = "Crystallography and morphology of twins in 9R martensite in Ti-Pd-Fe shape memory alloy",
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.",
author = "S. Ii and Minoru Nishida and T. Hara",
year = "2002",
month = "4",
day = "1",
doi = "10.1016/S1359-6462(01)01238-6",
language = "English",
volume = "46",
pages = "549--554",
journal = "Scripta Materialia",
issn = "1359-6462",
publisher = "Elsevier Limited",
number = "7",

}

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.

UR - http://www.scopus.com/inward/record.url?scp=0036533689&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036533689&partnerID=8YFLogxK

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 -