摘要
通过对Nb Ti超导线材的制备过程中引起断线的典型缺陷表征,分析了Nb Ti合金中加工流线的形成和溶质再分配导致的富Ti偏析现象以及流线和暗斑的形成机理。结果表明:Nb Ti合金中的富Ti偏析可用X-Ray透射照片中的呈现的黑斑和木纹表征,其实质是一种通道偏析,为后续改进Nb Ti合金制备工艺,消除富Ti偏析、提高Nb Ti合金成分以及组织均匀性奠定基础。
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-riehed 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.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2014年第11期2702-2707,共6页
Rare Metal Materials and Engineering
基金
陕西省青年科技新星项目(2011kjxx07)
关键词
NB
TI
超导
Nb不熔块
富Ti偏析
黑斑
木纹
通道偏析
NbTi
superconducting
Nb inclusion
Ti-riched segregation
black spot
tree ring
channel segregation
作者简介
通讯作者：付宝全，男，1972年生，博士生，教授，西部超导材料科技股份有限公司，陕西西安710018，电话：029-86524696，E-mail：fubg@e-wst．com
