The tensile behavior of Ti36Ni49Hf15 high temperature shape memory alloy

Wang, Y

doi:10.1016/s1359-6462(99)00085-8

Cited by 80 publications

(22 citation statements)

References 12 publications

(17 reference statements)

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“…The theoretical calculations for CRSS in Ni 2 FeGa, Co 2 NiGa, Co 2 NiA, NiTi, NiTiHf 25 , and CuZn results in 0.63, 0.76, 0.72, 0.71, 0.78 and 0.08 GPa respectively [38]. These values are consistent with corresponding experimental values presented in [20,[39][40][41][42][43][44][45][46][47].…”

Section: Transformation Strain-slip Resistance Behavior Of Smassupporting

confidence: 87%

“…Early work on NiTiHf alloys has given insight on the physical metallurgy and metallurgical processing studies [63][64][65]. Few preliminary studies on the mechanical behavior of different Hf contents were made from early 2000, in particular focusing on the shape memory response of bent plates [66][67][68]. Because of elastic recovery and tension-compression symmetry it is difficult to interpret bending results.…”

Section: Overview Of Previous Nitihf Workmentioning

confidence: 99%

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Shape memory strains and temperatures in the extreme

Şehitoğlu

Patriarca

2017

Current Opinion in Solid State and Materials Science

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It is well known that the achievement of high transformation strains in shape memory alloys (SMAs) has been curtailed by plastic deformation mediated via dislocation slip. In particular, the utilization of SMAs at high temperatures is also hindered by plastic slip. In this paper, an overview of the most important SMAs is provided by constructing transformation strain, transformation temperature, and slip resistance plots to put existing works in perspective. To this plots, we added results on NiTiHf alloys which impart both high temperature capability and high slip resistance at unprecedented levels. The remarkable finding is that NiTiHf alloys can undergo transformation strains near 20% and transformation temperatures exceeding 400 °C

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Section: Transformation Strain-slip Resistance Behavior Of Smassupporting

confidence: 87%

Section: Overview Of Previous Nitihf Workmentioning

confidence: 99%

Shape memory strains and temperatures in the extreme

Şehitoğlu

Patriarca

2017

Current Opinion in Solid State and Materials Science

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“…As the lattice invariant shear in this case becomes (0 0 1) compound twinning, the dislocation slip during MT is inevitable according to Kudoh et al [36]. This is the reason why the critical stress for dislocation slip is almost the same as for the stress-induced MT in Ti-Ni-Hf [18]. That is why the strain hardening level (martensite stabilization by plastic deformation) is so high for TiNiHf, TiNiZr and ZrCu-based HTSMA [28,37].…”

Section: Some Common Htsma Problems and Work To Be Donementioning

confidence: 98%

“…Still, most attention was focussing on Ni-Ti-Zr and Ni-Ti-Hf HTSMA mainly due to the relative low prices for raw materials [18][19][20][21][22][23][24][25].…”

Section: Overview Of Htsmamentioning

confidence: 99%

Shape memory alloys with high transformation temperatures

Humbeeck¹

2012

Materials Research Bulletin

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“…Hf/Zr)-rich compositions since they exhibit relatively high transformation temperatures [20][21][22][23][24][25][26][27]. However, numerous disadvantages such as low recoverable and transformation strains, poor thermal and dimensional stability, large hysteresis, brittleness, and reduced workability lead to poor shape memory behavior and lack of a superelastic response in these alloys.…”

Section: Ni-ti-hf/zr Alloysmentioning

confidence: 99%

Effect of Thermal Treatments on Ni–Mn–Ga and Ni-Rich Ni–Ti–Hf/Zr High-Temperature Shape Memory Alloys

Santamarta

Evirgen

Pérez-Sierra

et al. 2015

Shap. Mem. Superelasticity

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Among all the promising high-temperature shape memory alloys (HTSMAs), the Ni-Mn-Ga and the Ni-Ti-Hf/Zr systems exhibit interesting shape memory and superelastic properties that may place them in a good position for potential applications. The present work shows that thermal treatments play a crucial role in controlling the martensitic phase transformation characteristics of both systems, but in different ways. On one hand, the equilibrium phase diagram of the Ni-Mn-Ga family allows selecting compositions with high transformation temperatures and outstanding thermal stability at relatively high temperatures in air, showing no significant changes in the transformation behavior for continuous aging up to *5 years at 500°C. Moreover, the excellent thermal stability correlates with a good thermal cyclic stability and an exceptional oxidation resistance of the parent phase. On the other hand, precipitation processes controlled by thermal treatments are needed to manipulate the transformation temperatures, mechanical properties, and thermal stability of Ni-rich Ni-Ti-Hf/Zr alloys to become HTSMAs. These changes in the functional properties are a consequence of the competition between the mechanical and compositional effects of the precipitates on the martensitic transformation.

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The tensile behavior of Ti36Ni49Hf15 high temperature shape memory alloy

Cited by 80 publications

References 12 publications

Shape memory strains and temperatures in the extreme

Shape memory strains and temperatures in the extreme

Shape memory alloys with high transformation temperatures

Effect of Thermal Treatments on Ni–Mn–Ga and Ni-Rich Ni–Ti–Hf/Zr High-Temperature Shape Memory Alloys

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