Age-induced four-stage transformation in Ni-rich NiTi shape memory alloys

详细信息	查看全文 | 推荐本文 |

• 作者：L.J. Chiang ; C.H. Li ; Y.F. Hsu ; W.H. Wang
• 关键词：Precipitation ; Grain boundaries ; Thermal analysis
• 刊名：Journal of Alloys and Compounds
• 出版年：2008
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：30 June 2008
• 卷：458
• 期：1-2
• 页码：231-237
• 文件大小：1291 K

摘要

A four-stage transformation has been observed in an aged Ti–50.7 at.%Ni shape memory alloy by differential scanning calorimetry (DSC). Such phenomenon is able to occur in the alloys with compositions around 50.7 at.%Ni by aging at 673 K. The multi-stage transformation behavior observed in this study is attributed to the complex microstructural evolution, i.e., formation of large-scale and small-scale heterogeneities which induced various stress fields and affected the phase transformation sequence.