[PDF] Top 20 A Study on the Wire Drawing of TiNi Shape Memory Alloys

... A thin surface oxide film can be used as a lubricant during the drawing process, however, thick oxide films tend to exhibit cracks and spalIing which decrease t[r] ... See full document

... 3. The addition of certain third elements that sup- w x press martensitic transformation temperatures 20 .... The B2 lR-phase of TiNi alloys exhibits the thermoelastic ... See full document

... cycling on transformation temperatures of Ti 49 Ni 51 al- loy is also ...investigated. A 400 ◦ C × 20 h aged Ti 49 Ni 51 specimen is selected to study this ...shows the specimen ... See full document

... and A ∗ are the peak temperatures of DSC curves for the forward and reversed martensitic transformation of TiNi shape memory alloys, ...hardness of ... See full document

... In this study, the corrosion properties and wear characteristics of equiatomic TiNi shape memory alloys with and without ion nitriding were investigated. The improvem[r] ... See full document

... From the aforementioned literature survey, it can be seen known as one of the most important ...is a promising method for joining TiNi applications, the weldability might have ... See full document

... Developments of TiNi-based SMAs have witnessed a considerable progress in recent ...years. The two-stage martensitic transformations of B2 ↔R-phase↔B19 0 and B2 ↔B19↔B19 0 have been ... See full document

... Among the reported shape-memory alloys (SMAs), TiNi alloys are the most attractive ones because of their excellent shape-mem- ory effect and ...at a ... See full document

... that of the martensite phase is a B199 monoclinic in which reported that the lattice parameters of martensitic phase the space group is P2 /m and the lattice parameters ... See full document

... The wire electro-discharge machining (WEDM) characteristics of TiNiX ternary shape memory alloys (SMAs) have been investigated in this ...that the maximum feeding rate ... See full document

... The wire electro-discharge machining (WEDM) characteristics of TiNiX ternary shape memory alloys (SMAs) have been investigated in this ...that the maximum feeding rate ... See full document

... these alloys. However, dislocations induced by cold rolling come from the plastic deformation of martensite and those induced by thermal cycling come from the thermal stress and transformation ... See full document

... which the transformation peak temperatures A* and M* of this alloys are higher than those of equiatomic or Ni-rich TiNi alloys, but lower than those of Ti 51 Ni 49 ... See full document

... As discussed in Section I V - A , the martensite and R phase of TiNi alloys have a high damping capacity due to the movement of twin boundaries, but the parent[r] ... See full document

... 7. The damping capacity d ...characteristics of TiNi SMAs have been high plateau. Because the yielding stress of B199 marten- systematically studied by using resonant-bar and low site ... See full document

... The surface hardness, ascribed to the thickness o f TiN and Ti2Ni compound layer, increases with increasing nitriding temperature and time.. Suzuki, Scripta MetalI[r] ... See full document

... Department of Materials Science, Feng Chia University, Taichung 400, Taiwan, ROC Received 8 March 2000; received in revised form 13 April 2000; accepted 15 May 2000 Abstract The martensitic transformation ... See full document

... Shape memory alloys (SMAs) have been extensively used in sensors and ...by the microstruc- ...satisfy the compatibility equa- tion to minimize the total ...nonlinearity of ... See full document

... enhance the chemical etching process with mixed solutions of HF/HNO 3 /H 2 ...O. The higher the HF/HNO 3 volume ratio in the solution, the higher the etching rate and ... See full document

... Ti50Ni50 shape memory alloy was gas nitrided to modify the surface ...conditions. The surface hardness, wear characteristic, transformation temperature and shape memory ability ... See full document