Cold-Mass to Cryostat Mechanical Interface - CERN Accelerator ...

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Outline 1. General rules for the selection and specification of quality materials materials for vacuum technology; an historical perspective 2. The main families of metals and alloys used in vacuum technology: technology: from production processes to the final inspections ⇒ Discussion of a) a) Stainless Stainless steels steels b) b) Aluminium Aluminium and and alloys alloys c) c) Copper Copper and and alloys alloys d) d) Other Other and and less less common common materials materials (and (and processes) processes) Examples of application Aspects related to manufacturing, joining, near net shaping techniques techniques Failure analyses, including corrosion issues... 3. Conclusions 30/05/2006 Special CERN Accelerator School 2
General rules 1. Ease of degassing 2. Adequate strength at high as well as low T 3. Thermal expansion coefficients 1. Ease of machinability and joining 4. The purity of the material 2. Sealing glasses, ceramics and other insulators 5. Exact knowledge of the material properties, critical 3. Materials selection, to careful yield low control outgassing rates 6. 4. Bakeability Very constant properties of the raw materials, to be 5. Interdependence specially prepared of cleaning, joining, construction and 7. application Ease of fabrication and cost of vacuum materials are 6. Stainless often of steel secondary is the dominant importance material (sic !) ((Espe (O'Hanlon, Espe, O'Hanlon, , Materials Materials A A User's User's of of High High guide guide Vacuum Vacuum to to Vacuum Vacuum technology, technology, Technology, Technology, vol. vol. 1, 1, Wiley, Wiley, Pergamon Pergamon 2003) 2003 Press, Press, 1966) 1966) 30/05/2006 Special CERN Accelerator School 3
Page 1: CAS course "Vacuum in Accelerators"
Page 5 and 6: + cooling capillars 5
Page 8 and 9: fcc bcc 2.a Stainless steels δ-Fe
Page 10 and 11: 2.a Stainless steels, steels, marte
Page 12 and 13: 2.a Stainless steels, steels, auste
Page 14 and 15: 2.a Stainless steels, steels, auste
Page 16 and 17: 30/05/2006 Special CERN Accelerator
Page 18 and 19: 7.1 x 2.a Stainless steels, steels,
Page 20 and 21: The standard ASTM E45-97 E45 97 5/3
Page 22 and 23: The CERN reference specification fo
Page 24 and 25: app. 2 mm 30/05/2006 Special CERN A
Page 26 and 27: Electrical C ↓ Arc Furnace: funct
Page 28 and 29: Courtesy of Breitenfeld Edelstahl /
Page 30 and 31: 2.a Stainless steels, steels, weldi
Page 32 and 33: 2.a Stainless steels, steels, effec
Page 34 and 35: 2.a Stainless steels, steels, braze
Page 36 and 37: 2.b) Aluminium and alloys Wrought A
Page 38 and 39: EN AW-6063 2.b) Aluminium and alloy
Page 40 and 41: H18 (work hardened to the hardest s
Page 42 and 43: UTS, YS /MPa El. in 50 mm /% 300 25
Page 44 and 45: Failure of thin walled Al-alloy Al
Page 46 and 47: 30/05/2006 TS department seminar 46
Page 48 and 49: 2.c) Copper and alloys OFE, OF Cu,
Page 50 and 51: ⇓⇓⇓⇓⇓⇓⇓⇓⇓ ⇓⇓
Page 52 and 53:
30/05/2006 Special CERN Accelerator
Page 54 and 55:
• GlidCop® GlidCop AL-25 AL 25
Page 56 and 57:
2.d) Other and less common material
Page 59 and 60:
PM 316 LN, Microstructure: Grain si
Page 61 and 62:
99.85Cu-0.15Zr, UNS C15000 99.97+ %
Page 63 and 64:
Stainless Stainless steels steels 3
Page 65:
3) Conclusions Consider the materi
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Cold-Mass to Cryostat Mechanical Interface - CERN Accelerator ...

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