Main defects of NbTi alloy and the formation mechanism

Baoquan Fu, Pingxiang Zhang, Jinshan Li, Kai Fan, Yongjian Zheng, Yongsheng He, Yi Zhang, Xianghong Liu, Yong Feng

Research output: Contribution to journalArticlepeer-review

Abstract

The typical defects resulting in the broken wire during the preparation of NbTi superconducting alloy wires was described. The formation mechanism of forging streamline, the Ti-riched segregation resulted from solute redistribution and the mechanism of streamline and black spots were analyzed. The results indicate that the Ti-riched segregation of NbTi alloy could be described by black spots and tree ring in X-ray photograph and the essence of this segregation is channel segregation. It is aimed to provide a method to optimize the preparation technology, which can eliminate the Ti-rich segregation and improve the constituent and microstructure homogeneity of NbTi superconducting alloy.

Original languageEnglish
Pages (from-to)2702-2707
Number of pages6
JournalXiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume43
Issue number11
StatePublished - 1 Nov 2014

Keywords

  • Black spot
  • Channel segregation
  • Nb inclusion
  • NbTi
  • Superconducting
  • Ti-riched segregation
  • Tree ring

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