In Taiwan, many groups engage in the development of TiNi SMAs. The two-stage martensitic transformations of and have been clarified for both TiNi binary and ternary alloys. The deformation behaviors have been investigated by cold-rolling, hot-rolling and wire drawing. Both shape memory effect and pseudoelasticity can be improved by some thermal-mechanical treatments. The damping characteristics of TiNi and TiNiX SMAs have also been systematically studied. Both B19'/B19 martensite (M)and R-phase(R) have high daming capacities due to the stress-induced movement of twin boundaries. Meanwhile, the addition of third elements-Fe and Cu-can largely increase the damping capacity.Recently, some high temperature shape memory alloys-TiHiPd and TiNi-.Au alloys-have also been intensively studied in Taiwan. All these potential investigations on the TiNi SMAs in Taiwan have attracted much attention and their important characteristics will be applied widely in the near future.
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| [19] | ．S．Miyazaki,K．OtsukaandY．Suzuki,Scriptametall．,1981 |
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