The 4 K Tensile and Fracture Toughness Properties of a Modified 316LN Conduit Alloy
نویسندگان
چکیده
The 45-T Hybrid magnet will employ Cable-In-Conduit Conductor (CICC) technology for the windings of the Nb3Sn and NbTi coils. The conduit steel must retain high strength and fracture toughness at 4 K, following the Nb3Sn reaction heat treatment. The design requirements call for a 4 K yield strength exceeding 1000 MPa and a 4 K fracture toughness (KIc) greater than 110 MPa m -0.5. We report the mechanical properties of a commercial 316L alloy and modified version of 316 LN with extremely low carbon content, before and after a simulated N b3Sn reaction heat treatment. The related effects of prior cold work are also reported .
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