Investigation of the cryogenic mechanical properties of low thermal-expansion superalloys
Description
Four Fe-based superalloys, JBK-75, Incoloy 903, Incoloy 905, and Incoloy 909 were evaluated as tube materials for ICCS Nb3Sn superconductors. Evaluation consisted of 4-K tensile and elastic-plastic fracture-toughness testing, and a microstructural characterization of unwelded and autogenously gas-tungsten-arc welded sheet given a simulated postweld processing treatment of 15% cold reduction by rolling followed by a Nb3Sn-reaction heat treatment of 96 hours at 7000C plus 48 hours at 7300C. Results indicate that JBK-75 and Incoloy 903 showed satisfactory combinations of strength and toughness for ICCS tube use requiring long Nb3Sn-reaction heat treatments. Incoloy 905 welds and 909 showed unacceptable fracture toughness. Results are discussed in terms of microstructural changes caused by the extended Nb3Sn-reaction heat treatment
Availability note (English)
MF available from INIS under the Report Number; Available from NTIS, PC A02/MF A01 as DE85016650.Files
17012120.pdf
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Additional details
Publishing Information
- Imprint Pagination
- 9 p.
- Report number
- UCRL--92345
Conference
- Title
- Cryogenic engineering conference and international cryogenic materials conference.
- Dates
- 12-16 Aug 1985.
- Place
- Boston, MA (USA).
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 17012120
- Subject category
- S36: MATERIALS SCIENCE; S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Resource subtype / Literary indicator
- Conference, Numerical Data
- Descriptors DEI
- CRYOGENICS; EXPERIMENTAL DATA; INCOLOY ALLOYS; IRON BASE ALLOYS; MECHANICAL PROPERTIES; MICROSTRUCTURE; STRAINS; SUPERCONDUCTORS; TUBES; ULTRALOW TEMPERATURE; WELDED JOINTS
- Descriptors DEC
- ALLOYS; CRYSTAL STRUCTURE; DATA; INFORMATION; IRON ALLOYS; JOINTS; NUMERICAL DATA
Optional Information
- Secondary number(s)
- CONF-850814--1.