Article ID Journal Published Year Pages File Type
1624508 Journal of Alloys and Compounds 2008 5 Pages PDF
Abstract
The internal friction of TiNi-based SMAs measured by step cooling method in DMA may be misled when the used isothermal time interval t is insufficient. For Ti50Ni50 SMA, the tan δ values of B2 → R and R → B19′ internal friction peaks measured by step cooling method are lessening with prolonging the t value. This is because the tan δ value of IFTr still subsists and decreases continuously during the frequency sweep process. The t effect is more significant when the step cooling method is measured at lower frequency. According to the experimental results of Ti50Ni50 SMA, it is acceptable to choose t = 20 min to eliminate most of the influence of IFTr.
Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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