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[UCI]I804:24011-200000265410

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R(Trigonal), B2(Cubic), B19(Orthorhombic) and

B19'(Monoclinic)

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Apparatuer for thermal cycling of Ti-Ni alloy wire

Differential scanning calorimetry.

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θ

θ

θ

θ

θ

θ

(13)
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(15)

σ Δ ε

(16)
(17)
(18)

~11,12.

(19)

0 10 20 30 40 50 60 70 80 90 100 873

1073 1273 1473 1873 2073

1673

(Ni)

( b Ti)

(a Ti)

L

Ni-content (at%)

TiNi

T i

2

N i T iN i

3

T em pe ra tu re ( K )

1943K

1215K 1038K

1237K 1583K

1389K

1577K

1653K 1728K

903K

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TiNi

Ti

3

Ni

4

Ti

2

Ni

3

TiNi

3

Ti

2

Ni

B2 (CsCl type)

Rhombohedral

Orthorhombic (lower temp.) Tetragonal (higher temp.)

Hexagonal Cubic

a=0.3015nm a=0.67nm, a=113.8 ° a=0.4398nm b=0.4370nm c=1.3544nm a=0.3095nm c=1.3585nm

a=0.51nm c=0.831nm a=1.1278nm

(0001) TiNi

3

∥ (110) B2

[10-10] TiNi

3

∥ [111] B2

V1 (1-10) Ti

3

Ni

4

∥ [-321] B2 [111] Ti

3

Ni

4

∥ [111] B2 V2 (1-10) Ti

3

Ni

4

∥ [-312] B2

[111] Ti

3

Ni

4

∥ [111] B2 [501] Ti

2

Ni

3

∥ [111] B2 Crystal structure Lattice

parameter

Orientation relationship between precipitates and B2

(440) Ti

2

Ni ∥ (110) B2

Spacing Group

Fd3m R3

Bbmm

I4/mmm

P6 3 /mmc

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R(Trigonal), B2(Cubic), B19(Orthorhombic) and B19'(Monoclinic)

Crystal system Unit cell Alloys

B2(Cubic)

Ag-Cd, Au-Cd, Cu-Zr Ni-Al, Ti-Ni, Ti-Ni-Cu

Ti-Pd-Ni

R(Trigonal) Au-Cd. Ti-Ni

(B2->R = 1%)

B19(Orthorhombic) Ti-Ni-Cu, Ti-Pd-Ni

(B2->B19 = 4%)

B19'(Monoclinic) Ti-Ni

(B2->B19' = 8%)

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Alloy

Compo sition

(at%) Structure change

Temper ature hystere

sis(K) Orde

ring

Ref. on structure

Ref. on crystallography,

SME and SE

Ag-Cd 44-49

Cd B2-2H ~ 15 orde

red 26 27, 28

Au-Cd 46.5-48

.0 Cd B2-2H ~ 15 orde

red 29, 30 31-34

49-50

Cd B2-trigonal ~ 2 orde

red 35, 36 33, 37

Cu-Zn 38.5-41

.5 Zn B2-M (modified) 9R ~ 10 orde

red 38 10, 39

Cu-Zn-X A few

at% B2-M9R ~ 10 orde

red 38 9, 10, 11, 28, 40

(X = Si,Sn,Al,Ga)

Cu-Al-Ni

28-29 Al, 3.0-

D03-2H ~ 35 orde

red 41, 42 3, 8, 43-45

4.5 Ni

Cu-Sn ~15 Sn D03-2H, 18R - orde

red 46, 47 48

Cu-Au-Zn 23-28

Au Heusler-18R ~ 6 orde

red 49 50

45-47 Zn

Ni-Al 36-38

Al B2-3R, 7R ~ 10 orde

red 51, 52 53-56

Ti-Ni 49-51

Ni B2-monoclinic ~ 30 orde

red 57 59-61

B2-R-phase-(monoclinic) ~ 2 orde

red 58 62,63,64

Ti-Ni-Cu 8-20

Cu B2-orthorhombic-(monoclinic) 4-12 orde

red 65 66

Ti-Pd-Ni 0-40 Ni B2-orthorhombic 30-50 orde

red 67, 68 69-71

In-Ti 18-23

Ti FCC-FCT ~ 4

diso rder ed

72 73-75

In-Cd 4-5 Cd FCC-FCT ~ 3

diso rder ed

76 76

Mn-Cd 5-35

Cu FCC-FCT -

diso rder ed

77 78

Ti-Pd-Ni alloys with high Pd content do not exhibit good SME unless specially

thermomechanically treated

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Ti Ni C H O N

NT-3 49.04 50.74 0.165 0.026 0.053 0.005

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~40

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α

θ

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(39)
(40)

temperature

Specimen R

s

R

p

R

f

M

s

M

p

M

f

A

s

A

p

A

f

NT-3 18 2 -21 -54 -65 -75 -7 2 87

NT-5 - - - -49 -3 6 -51 0 46

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~40

~

~

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~40

~

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(51)
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(a) (b)

(54)

~

ε

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 

d

100

d

110

d

111

d

200

d

210

d

211

3.015 2.132 1.741 1.508 1.348 1.231

100

110

111

200

210

211

29.6 42.4 52.6 61.8 70.2 77.6

 

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θ

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θ

θ

(70)

θ

(71)

~

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σ Δ ε

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(78)

Arbab-Chirani, PhD,c,d and Sylvain Calloch, PhD,cBrest and Plouzané, Oral

Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology

(2011) 115 121 –

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