Nb3Sn tensile strength and its distribution estimated from change in superconducting critical current of preloaded multifilamentary composite wire

S. Ochiai, S. Nishino, M. Hojo, K. Osamura, Kazuo Watanabe

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The distribution of tensile strength of Nb3Sn in multifilamentary composite wires heat-treated at 973 K for 8.64 ks (sample A) and for 43.2 ks (sample B) was estimated from an analysis of the change in the superconducting critical current at 4.2 K caused by the preloading treatment at room temperature. The average strengths of Nb3Sn in samples A and B for a gauge length of 25 mm were 1.3 and 1.0 GPa, respectively. Applying the two-parameter Weibull distribution function, the shape parameters of samples A and B were 7.2 and 12 and the scale parameters 1.4 and 1.1 GPa, respectively. These results indicate that when the thickness of Nb3Sn becomes great, the average strength becomes low, while the scatter of the strength (the coefficient of variation) becomes small.

Original languageEnglish
Pages (from-to)55-60
Number of pages6
JournalCryogenics
Volume35
Issue number1
DOIs
Publication statusPublished - 1995 Jan 1

Keywords

  • NbSn
  • strength distribution
  • superconducting critical current

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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