Nanocrystallization of NiTi shape memory alloys made amorphous by high-pressure torsion

被引：72
作者：
Peterlechner, M. [1 ]
Waitz, T. [1 ]
Karnthaler, H. P. [1 ]
机构：
[1] Univ Vienna, A-1090 Vienna, Austria
来源：
SCRIPTA MATERIALIA | 2008年 / 59卷 / 05期
关键词：
high-pressure torsion; in situ transmission electron microscopy (TEM); nanocrystallization; kinetics; NiTi shape memory alloy;
D O I：
10.1016/j.scriptamat.2008.05.004
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Almost complete amorphization is obtained in NiTi subjected to high-pressure torsion (HPT). Nanocrystallization occurs more than 100 degrees C lower than in amorphous sputtered and melt spun NiTi. This is caused by medium-range-ordered debris surviving HPT and triggering nanocrystallization. A high nucleation rate and low growth rate result from in situ heating transmission electron microscopy experiments. The kinetics of the heterogeneous nanocrystallization differs significantly from that leading to coarse grains. Therefore, HPT allows the nanostructure to be tailored to enhance shape memory properties. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：566 / 569
页数：4
相关论文
共 34 条
  • [1] Thermal stability and nanocrystallization of amorphous Ti-Ni alloys prepared by cold rolling and post-deformation annealing
    Brailovski, V.
    Prokoshkin, S. D.
    Bastarash, E.
    Demers, V.
    Inaekyan, K. E.
    Khmelevskaya, I. Yu.
    [J]. THERMEC 2006, PTS 1-5, 2007, 539-543 : 1964 - +
  • [2] STABILITY AND ELECTRICAL TRANSPORT-PROPERTIES OF AMORPHOUS TI1-XNIX ALLOYS
    BUSCHOW, KHJ
    [J]. JOURNAL OF PHYSICS F-METAL PHYSICS, 1983, 13 (03): : 563 - 571
  • [3] Annealing effects on the crystallization and shape memory effect of Ti50Ni25Cu25 melt-spun ribbons
    Chang, S. H.
    Wu, S. K.
    Kimura, H.
    [J]. INTERMETALLICS, 2007, 15 (03) : 233 - 240
  • [4] Crystallization temperature and activation energy of rf-sputtered near-equiatomic TiNi and Ti50Ni40Cu10 thin films
    Chen, JZ
    Wu, SK
    [J]. JOURNAL OF NON-CRYSTALLINE SOLIDS, 2001, 288 (1-3) : 159 - 165
  • [5] Christian JW., 1965, THEORY TRANSFORMATIO
  • [6] Amorphization of TiNi induced by high-pressure torsion
    Huang, JY
    Zhu, YT
    Liao, XZ
    Valiev, RZ
    [J]. PHILOSOPHICAL MAGAZINE LETTERS, 2004, 84 (03) : 183 - 190
  • [7] Heterogeneous nucleation in photosensitive glasses
    Kalinina, AM
    Filipovich, VN
    Sycheva, GA
    [J]. JOURNAL OF NON-CRYSTALLINE SOLIDS, 1997, 219 : 80 - 83
  • [8] KISSINGER HE, 1957, ANAL CHEM, V29, P1702, DOI DOI 10.1021/AC60131A045
  • [9] Grain size estimations from the direct measurement of nucleation and growth
    Lee, HJ
    Ni, H
    Wu, DT
    Ramirez, AG
    [J]. APPLIED PHYSICS LETTERS, 2005, 87 (12) : 1 - 3
  • [10] Crystallization and phase transformations in amorphous NiTi thin films for microelectromechanical systems
    Lee, HJ
    Ramirez, AG
    [J]. APPLIED PHYSICS LETTERS, 2004, 85 (07) : 1146 - 1148
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