Crystallization process of amorphous phase produced by ion irradiation in TiNi shape memory alloy

Yutaka Sumida, Yoshitaka Matsukawa, Yasuyuki Haishi, Somei Ohnuki

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1 Citation (Scopus)

Abstract

Thermal crystallization from amorphous TiNi has been investigated due to `in-situ' observation in a high voltage electron microscope. The specimens contained several types of nucleation sites, such as free surfaces, C-A interfaces and cracks, which enabled to comparing crystallization at each site. The heterogeneous nucleation developed at the specimen edge and the crystalline-amorphous interface, where the crystallization temperature depended on each nucleation sites. The crystal growth was liner relation at each temperature, and the activation energy from Arrhenius plot was evaluated as 2.7 eV. The preferential crystallization was observed also on precracked area, which implies some stress-assisted effect on the crystallization.

Original languageEnglish
Pages (from-to)1218-1223
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume63
Issue number9
DOIs
Publication statusPublished - 1999

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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