Shape memory characteristics of TiNi casting alloys made by using self-propagating high-temperature synthesis
Shape memory characteristics of TiNi casting alloys made by using self-propagating high-temperature synthesis
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DOI：
10.1016/j.msea.2006.02.172
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发表时间：
2006-11
期刊：
影响因子：
6.4
通讯作者：
K. Kitamura;Toshio Kuchida;T. Inaba;M. Tokuda;Y. Yoshimi
中科院分区：
文献类型：
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作者：
K. Kitamura;Toshio Kuchida;T. Inaba;M. Tokuda;Y. Yoshimi
自蔓延高温合成（SHS）是一种制备TiNi合金锭的新方法。这种方法显示出很小的重力偏析。本研究的目的是研究由自蔓延高温合成锭和传统熔铸锭制备的TiNi铸造合金的形状记忆特性的差异。本研究中使用的样品是通过离心铸造制成的棒。采用差示扫描量热仪（DSC）、X射线衍射仪和拉伸试验研究了样品的形状记忆性能。热处理条件分别为773 K-1.8ks和1073 K-3.6ks。DSC样品是棒样品的两端（顶部和底部区域）。XRD测试结果表明，在所有样品中均得到了TiNi相。相比之下，DSC测试结果表明，在熔铸样品中比在SHS样品中发生更多的重力偏析效应。研究结果表明，重力偏析对SHS铸锭试样的影响很小。
Self-propagating high-temperature synthesis (SHS) is a new method of making an ingot of TiNi. This method shows little gravity segregation. The purpose of this study is to investigate the difference of the shape memory characteristics of the TiNi casting alloys made from a SHS ingot and from a conventional melt cast ingot. The samples used in this study were rods made by centrifugal casting. Differential scanning calorimetry (DSC), X-ray diffraction, and tensile test were used to examine the shape memory characteristics on the samples. The heat treatment conditions were 773K–1.8ks and 1073K–3.6ks, respectively. The DSC samples were both ends (the top and bottom area) of the rod samples. The results of the XRD measurements showed that TiNi phase was obtained in all the samples. In contrast, the result of the DSC test showed that more gravity segregation effect happened in the melt cast sample than in the SHS sample. As the conclusion of this study, gravity segregation had little effect in the SHS ingot sample.