| Issue |
MATEC Web of Conferences
Volume 33, 2015
ESOMAT 2015 – 10th European Symposium on Martensitic Transformations
|
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|---|---|---|
| Article Number | 06001 | |
| Number of page(s) | 4 | |
| Section | Other alloys | |
| DOI | https://doi.org/10.1051/matecconf/20153306001 | |
| Published online | 07 December 2015 | |
Formation Process of Triangular Morphology of Self-Accommodation Martensite in Ti-Nb-Al Shape Memory Alloy
1 Graduate Student, Tokyo Institute of Technology, 4259 Nagatsutacho, Midori-ku, Yokohama 226–8503, Japan
2 Precision and Intelligence Laboratory, Tokyo Institute of Technology, 4259 Nagatsutacho, Midori-ku, Yokohama, 226–8503, Japan
3 Division of Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305–8573, Japan
a Corresponding author: inamura.t.aa@m.titech.ac.jp
The formation process of a habit plane variant (HPV) cluster with triangular morphology (T-cluster) in Ti- Nb-Al shape memory alloy was investigated by in-situ optical microscopy. Upon cooling the specimen, martensitic transformation occurred and two types of V-shaped clusters and the T-clusters were observed. Two types of V-shaped cluster were the cluster connected by the {111} type I twin (VI) and the cluster connected by the <211> type II twin (VII). The T-cluster is formed by the connection of three HPVs by {111} type I twin. The T-cluster is formed by the growth of the third HPV that is nucleated at the tip of a HPV in a VI-cluster and exhibits inward growth. It is suggested that the T-cluster is a derivative of the VI-cluster. This growth behaviour is discussed based on the incompatibility of the clusters.
© Owned by the authors, published by EDP Sciences, 2015
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