High resolution electron microscopy studies of twin boundary structures in B19{prime} martensite in the Ti-Ni shape memory alloy

Journal Article · Wed Mar 01 00:00:00 EST 1995 · Acta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-7151(94)00328-F· OSTI ID:31740

Nishida, M; Itai, I; Ohgi, H; Chiba, A ^[1]; Yamauchi, K ^[2]

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1. Kumamoto Univ. (Japan). Dept. of Materials Science and Resource Engineering
2. Tokin Corp., Sendai (Japan). Materials Science and Development Lab.

The boundary structure of the <011> Type II, {l_brace}11{bar 1}{r_brace} Type I, {l_brace}011{r_brace} Type I, (100) compound and (001) compound twins in the B19{prime} martensite in the Ti-Ni shape memory alloy was observed in the edge-on state by high resolution electron microscopy (HREM). The lattice images of the Type I and the compound twins exhibit the well-defined crystallographic features of those boundaries. Lattice image of the <011> Type II twin taken from the unique {eta}{sub 1} axis suggests that neither ledge nor step structures are present at the irrational boundary.

• OSTI ID: 31740
• Journal Information: Acta Metallurgica et Materialia, Vol. 43, Issue 3; Other Information: PBD: Mar 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
TITANIUM ALLOYS
TWINNING
NICKEL ALLOYS
SAMPLE PREPARATION
GRAIN BOUNDARIES
CRYSTAL LATTICES
MICROSTRUCTURE