Risks and benefits of Incoloy 908

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• 作者：Libeyre ; P. ; Brosset ; C. ; Decool ; P. ; Rubino ; M. ; Bevilacqua ; G. ; Laurenti ; A. ; Pesenti ; P. ; Ursuleac ; M. ; et. al.
• 关键词：Incoloy 908 ; Nb₃Sn conductor jacket ; Cracks
• 刊名：Fusion Engineering and Design
• 出版年：2001
• 期刊代码：22_09203796
• 类别：pw
• 出版时间：November, 2001
• 卷：58-59
• 期：Complete
• 页码：129-134
• 文件大小：429 K

摘要

The central solenoid and toroidal field coils of ITER are designed with cable-in-conduit Nb₃Sn superconducting conductors jacketed with Incoloy 908. This material, developed to limit the critical current degradation of the Nb₃Sn strands, shows excellent mechanical properties at 4 K, particularly under cycling. Nevertheless, it is a crack prone material when heat treated in the presence of oxygen, which requires careful control of the atmosphere during manufacture. A programme of extensive mechanical testing of samples and manufacture of a pancake with incoloy conductor jacket was carried out in Europe. The origin of cracks in the incoloy jacket after heat treatment was investigated.