Communication: Literature survey on diffusivities of oxygen, aluminum, and vanadium in alpha titanium, beta titanium, an
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Communication: Literature Survey on Diffusivities of Oxygen Aluminum, and Vanadium in Alpha Titanium, Beta Titanium, and in Rutile by Z. Liu and G. Welsch
Page 1122: T a b l e II s h o u l d r e a d as f o l l o w s :
Table II. Ser. No. 1 2 3 4
The Pre-Exponential Constants and Activation Energies for Diffusion of Aluminum in Alpha Titanium Temp. (K) 1107 833 973 973
to to to to
1173 921 1173 1173
Do (m2/sec) 1.60 9.59 1.58 8.70
• • • x
10 -9 10 - l ~ 10 -12 10 -13
Q (kJ/mole)
Alloy
99.2 92.5 ~ 77.0 70.7
Ti-10 at. pct A1 Ti Ti-2A1 Ti-4.1AI
Method conc. conc. conc. conc.
grad. grad., E M A b grad. grad.
Ref. 44 45 46 46
(a) derived from the published data (b) electron microprobe analysis
Page 1122: T a b l e I V s h o u l d r e a d as f o l l o w s :
Table IV. Ser. No. 1 2 3 4
The Pre-Exponential Constants and Activation Energies for Diffusion of Aluminum in Beta Titanium Temp. (K) 1256 1256 1373 1373
to to to to
1523 1523 1523 1523
Do (m2/sec) 1.4 9.0 1.09 2.90
• 10 -9 • 10 -9 • 10 -6 X 10 -6
Q (kJ/mole)
Alloy
91.7 --- 15 107 -+- 20 172 180
Ti-2 at. pct AI Ti-12 at. pct A1 Ti-2.2AI Ti-4.55AI
Method conc. conc. conc. conc.
grad. grad. grad. grad.
Ref. 44 44 46 46
Page 1123: T a b l e V s h o u l d r e a d as f o l l o w s :
Table V.
The Pre-Exponential Constants and Activation Energies for Diffusion of Vanadium in Beta Titanium
Ser. No.
Temp. (K)
1 2
1173 to 1521 1173 to 1273
3
1173 to 1273
4
1173 to 1473
5
1173 to 1473
6 7 8
1173 to 1273 1173 to 1273 1223 to 1783
Do (m2/sec) 6.0 1.37 3.10 5.89 3.31 3.55 3.98 1.29 7.00 1.7 1.3 1.24 4.46
(a) Do~ and Q~, derived from the diffusion data (b) Do2 and Q2, derived from the diffusion data
946--VOLUME 22A, APRIL 1991
x x • • x x x x x • x • •
10 -6 10 -s 10 -s I0 -s 10 -7 10 -s 10 -7 10 -4 10 -7 10 -13 10 -13 10 -4 10 -8
Q (kJ/mole) 166 --- 20 239 a 135 b 170 a 157 b 161 a 163 b 273 ~ 173 b 34 c 24 c 239 e 140 f
Alloy
Method
Ref.
Ti-2 at. pct V
conc. grad.
44
Ti
conc. grad.
13
Ti
conc. grad.
14
Ti-10V
conc. grad.
14
Ti-20V Ti-15 at. pct V Ti-20 at. pct V
conc. grad. conc. grad., XS d conc. grad., XS a
14 52 52
Ti-0.01 at. pct V
conc. grad.
53
(c) derived from the published data (d) X-ray spectra
(e) Dot and Q~ (f) Do2 and Q2
METALLURGICAL TRANSACTIONS A
Page 1123: Table VI should read as follows:
Table VI.
The Pre-Exponential Constants and Activation Energies for Diffusion of Oxygen in Rutile
Ser. No.
T e m p . (K)
1 2
866 to 1033 866 to 1033
3 4 5
1233 to 1673 983 to 1573 1079
Q (kJ/mole)
Material
8.7 x 10 -z 2.69 • 10 -2
Do ( m 2 / s e c )
232 243
1.7 X 10 -6 2.0 X 10 -7 only individual D ' s
276 251
oxide scale on Ti oxide scale on Ti-6A1-2Sn-4Zr-2Mo oxide scale on Ti TiO2 oxide scale on Ti
Method
57 58 59
Temperature (~
Temperature (~ 1300 1100 -10 , , ,
900
\ \ ~
700
600
..........................
500
400
: ...........................
17oo +3oo 11oo 90o
300
-a
i
it'-
4
i
.......... i
.......... 9
[
I
~.........................
8 -14
resonance capture is
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