Relation between microstructure, physical properties and martensitic transformations in Ni-rich Ni-Ti shape memory alloys

被引：0

作者：

Wassermann, EF ^{[1
]}

Somsen, C ^{[1
]}

Kästner, J ^{[1
]}

Schryvers, D ^{[1
]}

Kompatscher, M ^{[1
]}

Kostorz, G ^{[1
]}

机构：

[1] Gerhard Mercator Univ, Tieftemp Phys, D-47048 Duisburg, Germany

来源：

PRICM 4: FORTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, VOLS I AND II | 2001年

关键词：

martensitic transformations; nickel titanium (NiTi) shape memory alloys; nickel-titanium precipitates (Ni4Ti3); B19 ' martensite and R-phase precursors;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigated NixTi180-x alloys with 51 less than or equal to x less than or equal to 54 at% Ni, quenched from 1000degreesC (B2 phase region). SANS measurements reveal the presence of precipitates on a length scale from 0.9nm (x = 51.5) to 1.32nm (x = 54), increasing in volume fraction from 0.3 % to 6 %. Diffuse diffraction spots in TEM identify the precipitates as Ni4Ti3, HREM shows their coherence. Additional reflections for x = 52 can be related to precursors of B19' martensite or R-phase, respectively. We assume that the strain fields of the Ni4Ti3 precipitates are the regions of R-phase formation, i.e. the precipitates trigger the R-martensite, responsible for the SME. The high value of the absolute resistivity (rho similar to 100muOmegacm) and the increase of rho(T)up to 40% between R.T. and 4.2K very likely originate from strain fields due to Ni4Ti3, precipitates in the early stage of formation.

引用

页码：1791 / 1794

页数：4

共 50 条

[41] Influence of thermal-mechanical processing on martensitic and R-phase transformations of Ni-Ti and Ni-Ti-Hf shape memory alloys
Zhang, C
Thoma, P
Zee, R
THERMEC '97 - INTERNATIONAL CONFERENCE ON THERMOMECHANICAL PROCESSING OF STEELS AND OTHER MATERIALS, VOLS I-II, 1997, : 1639 - 1645
[42] Effect of aging on martensitic transformation and microstructure in Ni-rich TiNiHf shape memory alloy
Meng, XL
Cai, W
Chen, F
Zhao, LC
SCRIPTA MATERIALIA, 2006, 54 (09) : 1599 - 1604
[43] Phase-field simulation of martensitic transformation in Ni-Ti shape memory alloys
Matsuki, Takanobu
Saitoh, Ken-Ichi
Technology Reports of Kansai University, 2010, (52): : 11 - 19
[44] Origin of abnormal multi-stage martensitic transformation behavior in aged Ni-rich Ti-Ni shape memory alloys
Fan, GL
Chen, W
Yang, S
Zhu, JH
Ren, XB
Otsuka, K
ACTA MATERIALIA, 2004, 52 (14) : 4351 - 4362
[45] Multi-stage martensitic transformation in Ni-rich NiTi shape memory alloys
Wang, Xiebin
Verlinden, Bert
Kustov, Sergey
FUNCTIONAL MATERIALS LETTERS, 2017, 10 (01)
[46] H-Phase Precipitation and Martensitic Transformation in Ni-rich Ni–Ti–Hf and Ni–Ti-Zr High-Temperature Shape Memory Alloys
Evirgen A.
Pons J.
Karaman I.
Santamarta R.
Noebe R.D.
Shape Memory and Superelasticity, 2018, 4 (1) : 85 - 92
[47] THE COMBUSTION SYNTHESIS OF NI-TI SHAPE MEMORY ALLOYS
YI, HC
MOORE, JJ
JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY, 1990, 42 (08): : 31 - 35
[48] Shape memory effect of clamped Ni-Ti alloys
Kaneko, Kenichi, 1600, Japan Inst of Metals, Sendai, Japan (58):
[49] Boriding of Binary Ni-Ti Shape Memory Alloys
Ucar, Nazim
Dogan, Sule
Karakas, Mustafa Serdar
Calik, Adnan
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, 2016, 71 (11): : 1017 - 1020
[50] REVERSION STRESSES IN NI-TI SHAPE MEMORY ALLOYS
MADANGOPAL, K
KRISHNAN, GR
BANERJEE, S
SCRIPTA METALLURGICA, 1988, 22 (10): : 1593 - 1598

← 1 2 3 4 5 →