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NbTi合金的主要缺陷及形成機制
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陜西省青年科技新星項目 (2011kjxx07)


Main Defects of NbTi Alloy and the Formation Mechanism
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    摘要:

    通過對NbTi超導線材的制備過程中引起斷線的典型缺陷表征，分析了NbTi合金中加工流線的形成和溶質(zhì)再分配導致的富Ti偏析現(xiàn)象以及流線和暗斑的形成機理。結(jié)果表明：NbTi合金中的富Ti偏析可用X-Ray透射照片中的呈現(xiàn)的黑斑和木紋表征，其實質(zhì)是一種通道偏析，為后續(xù)改進NbTi合金制備工藝，消除富Ti偏析、提高NbTi合金成分以及組織均勻性奠定基礎(chǔ)

    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.

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付寶全,張平祥,李金山,樊 凱,鄭永健,何永勝,張 奕,劉向宏,馮 勇. NbTi合金的主要缺陷及形成機制[J].稀有金屬材料與工程,2014,43(11):2702~2707.[Fu Baoquan, Zhang Pingxiang, Li Jinshan, Fan Kai, Zheng Yongjian, He Yongsheng, Zhang Yi, Liu Xianghong, Feng Yong. Main Defects of NbTi Alloy and the Formation Mechanism[J]. Rare Metal Materials and Engineering,2014,43(11):2702~2707.]
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  • 收稿日期:2014-09-01
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  • 在線發(fā)布日期: 2015-04-07
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