Transcript C17110 and C17410 coppers

C17110 and C17410 coppers
 Chemical composition (wt%) : copper = alloy balance
Be
Ni
Co
Fe
Zr
Sn
Al
Si
Zn
Cr
Pb
C17110
0.34
1.3
-
-
0.1
0.03
-
-
-
-
-
C17410
0.31
0.02
0.5
0.03
-
0.005 0.04 0.02 < 0.01
< 0.005 0.003
 Thermo-mechanical treatment :
C17110  TH01 = solution annealed + cold worked to 1/4 hard + precipitation hardened
750 -
800oC
300 - 400oC
Be-enriched g phase
C17410  TH02 = solution annealed + cold worked to 1/2 hard + precipitation hardened
03/04/2000
LHC Vacuum Design Meeting
Karine COUTURIER/EST-SM
Tensile properties at RT
L = longitudinal direction - T = transversal direction
Rp 0.2 (MPa)
700
600
500
400
L1
L2
L3
T1
T2
T3
300
200
100
0
C17110
TH01
C17410
TH02
800
30
700
25
600
20
500
A (%)
L1
L2
L3
T1
T2
T3
Rm (MPa)
800
400
300
10
200
5
100
0
C17110
TH01
Rp 0.2 / MPa
03/04/2000
15
C17410
TH02
Rm / MPa
0
C17110
TH01
A/%
C17110 / TH01
506
628
24.1
C17410 / TH02
626
736
18.7
LHC Vacuum Design Meeting
Karine COUTURIER/EST-SM
C17410
TH02
Tensile properties at 4.2 K
L5
L6
T4
T5
T6
L4
L5
L6
T4
T5
T6
C17110
TH01
50
1000
900
800
700
600
500
400
300
200
100
0
C17410
TH02
40
A (%)
1000
900
800
700
600
500
400
300
200
100
0
Rm (MPa)
Rp 0.2 (MPa)
L = longitudinal direction - T = transversal direction
20
10
C17110
TH01
Rp 0.2 / MPa
03/04/2000
30
C17410
TH02
Rm / MPa
0
C17110
TH01
A/%
C17110 / TH01
580
850
40.6
C17410 / TH02
740
937
37.5
LHC Vacuum Design Meeting
Karine COUTURIER/EST-SM
C17410
TH02
Comparison : Tensile properties
20 K
C17200
1000
4.2 K
800
C17110
600
C17410
400
200
0
Room T
Low T
Rm (MPa)
Rp 0.2 (MPa)
1200
20 K
1800
1600
1400
1200
1000
800
600
400
200
0
4.2 K
A (%)
1400
Room T
Low T
 lower yield and tensile strengths
 higher elongation at breakdown
03/04/2000
LHC Vacuum Design Meeting
Karine COUTURIER/EST-SM
4.2 K
45
40
35
30
25
20
15
10
5
0
20 K
Room T
Low T
Comparison with C17200 copper
More traditional grade with higher Be content (2 wt%)
Used in LEP ring at present
TH02 thermo-mechanical treatment
 Tensile properties at room and low temperatures :
 improved formability
 Improved electrical conductivity :
Total alloying (wt%)
% IACS
03/04/2000
C17200/TH02
C17110/TH01
C17410/TH02
3.2
1.77
 0.943
22-25
49.3
53.3
LHC Vacuum Design Meeting
Karine COUTURIER/EST-SM
Conclusion
 Advantages of C17110 and C17410 coppers in TH02 state :
- higher ductility, improved formability
 easier product forming
 simple manufacturing process
- higher electrical conductivity
 improved electrical output
compared to more traditional C17200 beryllium copper
 Are those new coppers interesting for LHC applications ?
Is Rp 0.2 value sufficient ? Is material choice still open ?
 STAINLESS firm propose to visit CERN during the first week of May.
03/04/2000
LHC Vacuum Design Meeting
Karine COUTURIER/EST-SM
Two new low beryllium coppers
 Description of C17110 and C17410 coppers :
alloying, thermo-mechanical state.
 Tensile properties at room temperature and 4.2 K.
 Comparison with more traditional C17200 copper :
tensile properties, electrical conductivity.
 Conclusion :
formability, electrical output.
possible applications at CERN.
03/04/2000
LHC Vacuum Design Meeting
Karine COUTURIER/EST-SM