-
-
-
.
, ,
-
.
[1]. ,
-
-
Ti40,7
Hf9,5
Ni44,8
Cu5
. . , . . , . . , . .
-
Ti40,7
Hf9,5
Ni44,8
Cu5 0
100%. ,
6% .
.
. ,
,
,
. , - Ti40,7
Hf9,5
Ni44,8
Cu5
: ,
. ,
. , Ti40,7
Hf9,5
Ni44,8
Cu5
, .
: - ; ;
; .
The mechanical behavior and functional properties in
amorphous-crystalline thin ribbons of
Ti40.7
Hf9.5
Ni44.8
Cu5 alloy with different volume fraction (from 0 to 100%) of
crystalline phase were studied.
Results obtained showed that the fully amorphous sample was
deformed elastically up to 6 %. The
existence of crystalline phase in the sample resulted in the
deformation was realized by reorientation of
martensite at the early stage. The strain accumulated at this
stage was fully recoverable during subsequent
heating through the temperature range of reverse martensitic
transformation. It was found that an
increase in volume fraction of crystalline phase led to rise of
value of shape memory effect. It was due
to the increasing the volume fraction of the sample deforming by
the mechanism of martensite reorientation.
It was observed that the amorphous crystalline Ti40.7
Hf9.5
Ni44.8
Cu5 alloy was deformed by three
mechanisms of unelastic deformation: reorientation of martensite
crystals, plastic deformation of amorphous
phase and dislocation slip. It was shown that the change in the
deformation mechanism was determined
by volume fraction of crystalline phase and the value of
preliminary strain. It was found that the
Ti40.7
Hf9.5
Ni44.8
Cu5 alloy exhibited that two-way shape memory effect only if the
amorphous and crystalline
phase were coexisted in the alloy.
Keywords: amorphous-crystalline alloys; shape memory effect;
two-way shape memory effect; mechanism
of deformation.
2011 378
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Ti40,7Hf9,5Ni44,8Cu5.
Ti40,7Hf9,5Ni44,8Cu5,
.
5 2 0,04 - -
. -
Mettler Toledo 822e
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[2].
Ti40,7Hf9,5Ni44,8Cu5 -
743 ,
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()
40, 70 100%.
--
Ti40,7Hf9,5Ni44,8Cu5
-
. ,
Ti40,7Hf9,5Ni44,8Cu5 -
B2
Ti40.7Hf9.5Ni44.8Cu5
, % , , , ,
4 0 217 204 256 285
7 0 246 241 275 316
100 268 265 305 325
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).
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() () Ti40,7Hf9,5Ni44,8Cu5
. ,
6%.
, 6% .
. ,
,
.
= 40% 2,5% -
0,27%,
= 100%
0,64%.
,
TiNi
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[3]. -
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. 2. () () Ti40,7Hf9,5Ni44,8Cu5 0% (1), 40%(2), 70% (3) 100%
(4).
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100%.
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6%. , , 40% - 2,4%. , . 4,
40% 1,23%,
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. 4. (K) () 40% (1),70% (2) 100% (3).
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2011 382
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3,27
6,25% 3,27 4,6%, 100
73,5%. 40%
1,36 6,72%
1,36 1,56%,
100 38,6%.
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.
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Ti40,7Hf9,5Ni44,8Cu5 -
-
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70%, -
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[3].
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83 2011 3
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. E-mail: [email protected].
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. E-mail: [email protected].
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, . E-mail: [email protected].
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[email protected].
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.
1. ., ., ..
. .: , 1987, 328 .
2. .., .., .. -
-
Ti40,7
Hf9,5
Ni44,8
Cu5.
, 2007, 4,
. 151 155.
3. . .I.
, .
: , 2006, 428 c.
4. Bellouard Y. Shape memory alloys for microsystems: A
review from a material research perspective. Materials
Science and Engineering A, 2008, v. 481 482,
p. 582 589.
5. Resnina N., Belyaev S., Shelyakov A. Martensitic
transformations in amorphous-crystalline Ti Ni Cu
and Ti Hf Ni Cu thin ribbons. EPJ ST, 2008, v. 158,
no. 1, p. 21 26.
6. Yunxiang Tong, Young Liu, Zeliang Xie. Characterization
of rapidly annealed Ti50
Ni25
Cu25
melt-spun ribbon. Journal
of Alloys and Compounds, 2008, v. 456, Iss. 1 2,
p. 170 177.
7. Waitz T., Spisak D., Hafner J., Karnthaler H.P. Size-
dependent martensitic transformation path causing atomic-
scale twinning of nanocrystalline NiTi shape memory
alloys. Europhysics Letters, 2005, v. 71, no. 1,
p. 98 103.
8. Santamarta R., Schryvers D. Effect of amorphous-
crystalline interfaces on the martensitic transformation in
Ti5 0
Ni2 5
Cu2 5
. Scr ipta Mater ial ia , 2004, v. 50,
p. 1423 1427.
9. Santamarta R., Schryvers D. Twinned b.c.c spherical
particles in a partially crystallized Ti50
Ni25
Cu25
melt-spun
ribbon. Intermetallics, 2004, v. 12, p. 341 348.
10. .., .., ..
. .: - . -, 1987, 216 .
