Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1624508 | Journal of Alloys and Compounds | 2008 | 5 Pages |
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 â R and R â B19â² 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
Authors
S.H. Chang, S.K. Wu,