Mechanical Strength Evaluation of the Internal Matrix Reinforced Nb3Sn Multifilamentary Wires Using Cu?Sn?In Ternary Alloy Matrix
Mechanical Strength Evaluation of the Internal Matrix Reinforced Nb3Sn Multifilamentary Wires Using Cu?Sn?In Ternary Alloy Matrix
复制标题
三元合金基体中Cu?Sn?内基体增强Nb3Sn复丝线材的机械强度评价
DOI：
10.1109/tasc.2020.2981305
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发表时间：
2020
影响因子：
1.8
通讯作者：
S. Awaji and A. Kikuchi
中科院分区：
文献类型：
--
作者：
Y. Hishinuma;H. Oguro;H. Taniguchi;S. Awaji and A. Kikuchi
研究了在Nb 3Sn青铜丝材上采用特殊增强三元青铜合金基体进行简单内增强的方法。基于固溶强化机制，Nb 3Sn合成后，Cu-Sn-Zn三元合金基体转变为（Cu，Zn）固溶体。为了进一步提高机械强度，我们将重点放在铟（In）作为“内部基体强化”的更有效的溶质元素上，并成功地使用各种Cu-Sn-In-（Ti）三元合金基体制备了青铜处理的Nb_3Sn多芯线材。研究了Nb_3Sn合成前后的维氏硬度变化以及单轴拉伸变形下的输运临界电流（Ic）。与普通青铜和Cu-Sn-Zn三元合金基体试样相比，Cu-Sn-In三元合金基体试样经Nb 3Sn合成后的维氏硬度较高。另一方面，在Cu-Sn-In三元合金基体样品上获得的最大峰值Ic值的拉伸应力估计为约265 MPa，并且该值远高于Cu-Sn-Zn三元基体和常规青铜处理样品的拉伸应力。我们发现In元素会成为比Zn元素更有吸引力的溶质元素。
We investigated the simple internal reinforcement method using special reinforcement ternary bronze alloy matrix on the bronze processed Nb3Sn wire. The Cu-Sn-Zn ternary alloy matrix was transformed to the (Cu, Zn) solid solution after Nb3Sn synthesis based on the solid solution strengthening mechanism. For the further mechanical strength improvement, we focused on the Indium (In) as the more effective solute element for the “internal matrix strengthening”, and succeeded to fabricate the bronze processed Nb3Sn multifilamentary wire using various Cu-Sn-In-(Ti) ternary alloy matrices. Changes of the Vickers hardness before and after Nb3Sn synthesis and the transport critical current (Ic) under the uniaxial tensile deformation were evaluated. Vickers hardness of the matrix after Nb3Sn synthesis on the Cu-Sn-In ternary alloy matrix samples was higher compared with the conventional bronze and the Cu-Sn-Zn ternary matrix samples. On the other hand, the tensile stress obtained to the maximum peak Ic value on the Cu-Sn-In ternary alloy matrix sample was estimated to approximately 265 MPa, and this value was much higher than those of the Cu-Sn-Zn ternary matrix and conventional bronze processed samples. We found that the In element would become more attractive solute element than Zn element for the internal reinforcement ternary matrix.