1 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Material Property Study for High Pressure Code in KEK NAKAI Hirotaka (KEK)

2 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Outline Background of material testing for High Pressure Gas Safety Act (HPGSA) Results of material tests at KEK Tensile test of pure niobium Tensile test of pure titanium Planned material tests Background of material testing for High Pressure Gas Safety Act (HPGSA) Results of material tests at KEK Tensile test of pure niobium Tensile test of pure titanium Planned material tests

3 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Relevant Laws & Technical Standards High Pressure Gas Safety Act; HPGSA Designated Equipment Inspection Regulations; DEIR Note “On Implementation of Functional Standards regarding Designated Equipment Inspection Regulations” (Exemplified Technical Standards); ETS High Pressure Gas Safety Act; HPGSA Designated Equipment Inspection Regulations; DEIR Note “On Implementation of Functional Standards regarding Designated Equipment Inspection Regulations” (Exemplified Technical Standards); ETS

4 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK SC Cavities & Cryomodules Niobium not specified in DEIR and ETS as materials for designated equipments Special technical approval (STA) is required before manufacturing Titanium specified in DEIR and ETS as materials for designated equipments No specifications given at temperatures lower than liquid nitrogen temperature Special technical approval (STA) is required before manufacturing Niobium not specified in DEIR and ETS as materials for designated equipments Special technical approval (STA) is required before manufacturing Titanium specified in DEIR and ETS as materials for designated equipments No specifications given at temperatures lower than liquid nitrogen temperature Special technical approval (STA) is required before manufacturing

5 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Allowable Tensile Stress in ETS

6 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Assurance of Tenacity at Low Temp. Charpy test for assuring tenacity at low temperature DEIR Art. 40 (Mechanical Test Standard) Impact test standard for welded part In case of tensile strength of parent material is 450 MPa or smaller, mean absorbed energy of 3 samples shall be 18 J or larger, and the minimum shall be 14 J or larger (for sample cross section: 10 mm x 10 mm) Charpy test for assuring tenacity at low temperature DEIR Art. 40 (Mechanical Test Standard) Impact test standard for welded part In case of tensile strength of parent material is 450 MPa or smaller, mean absorbed energy of 3 samples shall be 18 J or larger, and the minimum shall be 14 J or larger (for sample cross section: 10 mm x 10 mm)

7 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Published References Nb Tensile strength Aerospace Structure Metal Handbook Code 5201 Nb 0.2% proof stress Proc. Roy. Soc. A281 (1964) 223 Nb Coefficient of linear expansion Handbook on Material for Superconducting Machinery, Metals and Ceramic Information Center, MCIC-HB-04, January 1977 Computer code “CRYOCOMP” Nb Tensile strength Aerospace Structure Metal Handbook Code 5201 Nb 0.2% proof stress Proc. Roy. Soc. A281 (1964) 223 Nb Coefficient of linear expansion Handbook on Material for Superconducting Machinery, Metals and Ceramic Information Center, MCIC-HB-04, January 1977 Computer code “CRYOCOMP”

8 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Published References (Cont’d) Walsh R. P. et al., Proc. 9th Annual Workshop on RF Superconductivity 1 (2000) 195 (cited as “Ref.1” in this presentation) Niobium data from ATI Wah Chang web page: products.htm Titanium data from Kobelco web page: Walsh R. P. et al., Proc. 9th Annual Workshop on RF Superconductivity 1 (2000) 195 (cited as “Ref.1” in this presentation) Niobium data from ATI Wah Chang web page: products.htm Titanium data from Kobelco web page:

9 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Test Specimen (Ex JIS 7)

10 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Test Specimen (JIS 13b)

11 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Niobium Test Specimens

12 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Niobium Test Specimens

13 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Niobium Tested Same material as KEK Base-Line cavities Annealed at 750 °C Difference in roll and cross directions Difference in specimen dimensions Ex JIS 7 - specimen for low temp. testing JIS 13b - current minimum-size specimen Same material as KEK Base-Line cavities Annealed at 750 °C Difference in roll and cross directions Difference in specimen dimensions Ex JIS 7 - specimen for low temp. testing JIS 13b - current minimum-size specimen

14 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Niobium Test Results (Ex JIS 7)

15 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Niobium Test Results (JIS 13b)

16 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Niobium Data (ATI Wah Chang)

17 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Tensile Strength (Nb)

18 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK 0.2% Proof Stress (Nb)

19 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Modulus of Elasticity (Nb)

20 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Elongation (Nb)

21 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Titanium Test Results (Ex JIS 7)

22 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Inspection Certificate (Ti)

23 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Tensile Strength Data (Kobelco)

24 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Elongation Data (Kobelco)

25 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Tensile Strength (Ti)

26 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK 0.2% Proof Stress (Ti)

27 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Modulus of Elasticity (Ti)

28 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Elongation (Ti)

29 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Planned Material Tests Tensile tests at room, LN 2 and LHe temp. welded part of Nb-Nb (EBW) welded part of Ti-Ti (TIG) welded part of Nb-Ti (EBW) welded part of Nb-NbTi Charpy tests at room, LN 2 and LHe temp. Nb-Stainless Steel (HIP with Cu) Tensile tests at room, LN 2 and LHe temp. welded part of Nb-Nb (EBW) welded part of Ti-Ti (TIG) welded part of Nb-Ti (EBW) welded part of Nb-NbTi Charpy tests at room, LN 2 and LHe temp. Nb-Stainless Steel (HIP with Cu)

30 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Material Testing Machine at KEK

31 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Specimen Set in Testing Section

32 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Material Test at LN 2 Temp.

33 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Cryostat for LHe Temp. Test

34 HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION ILC08/ NAKAI HIrotaka KEK Material Test at LHe Temp.