Stress-strain behavior and degradation of critical current of Bi2223 composite tapes
Stress-strain behavior and degradation of critical current of Bi2223 composite tapes
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DOI：
10.1016/j.physc.2003.11.013
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发表时间：
2004-03-01
影响因子：
1.7
通讯作者：
Osamura, K
中科院分区：
文献类型：
--
作者：
Sugano, M;Osamura, K
在室温和77 K下测量了由Bi 2223、Ag和Ag合金组成的Bi 2223多芯带材的应力-应变曲线。在77 K的屈服发生在更大的施加应变比在RT。这种行为进行了讨论，在冷却过程中的残余应变。在低应变区，详细研究了I_3的应变依赖性的可逆性。当最大应变小于0.33%时，其恢复是可逆的。然而，当施加的应变超过0.38%时，不可逆行为被清楚地证实。这是Bi_（2223）复合带材中存在I-c可逆变化的应变区的第一个结果。(C)2003 Elsevier B. V.保留所有权利。
Stress-strain curve of commercially available Bi2223 multi-filamentary tapes was measured at RT and 77 K, which are composed of Bi2223, Ag and Ag alloy. The yielding at 77 K takes place at larger applied strain than that at RT. This behavior was discussed in terms of the residual strain during cooling. The reversibility of strain dependence of I, was investigated in detail in the low strain region. It recovered reversibly when the maximum strain was less than 0.33%. However, when the applied strain exceeded 0.38%, the irreversible behavior was clearly confirmed. This is the first result that the strain region of reversible change of I-c exists in Bi2223 composite tape. (C) 2003 Elsevier B.V. All rights reserved.