Martensitic transformation strain and stability of Ni50−x–Ti50–Cox (x=3,4) strips obtained by twin-roll casting and standard processing techniques

Isola, L.; Roca, P. La; Sobrero, C.; Fuster, V.; Vermaut, Ph.; Malarrı́a, J.

doi:10.1016/j.matdes.2016.06.049

Cited by 14 publications

(6 citation statements)

References 53 publications

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“…this study the advantage of using zirconium instead of niobium as principal alloying element due to the fact that the minimum value of transformation strain obtained for the Ti-20Zr-3Mo-3Sn alloy (2.5%) is 4 times higher than the minimum value of transformation strain obtained for the Ti-24Nb-4Zr-8Sn alloy (0.6%, which is very low). On the other hand, calculated transformation strains for the B2-B19' martensitic transformation in NiTi alloys can be found in literature for comparison [27,28].…”

Section: Discussionmentioning

confidence: 99%

Influence of texture and transformation strain on the superelastic performance of a new Ti–20Zr–3Mo–3Sn alloy

Gao

Thibon

Laillé

et al. 2019

Materials Science and Engineering: A

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In this work, the superelastic behavior of a new metastable β Ti-20Zr-3Mo-3Sn (at.%) biomedical alloy displaying stress-induced α" martensitic transformation (SIM) was investigated by cyclic tensile tests, electron back-scattered diffraction (EBSD) and in situ synchrotron X-ray diffraction (SXRD) for 3 different solution treatment temperatures: 700°C, 800°C and 900°C. The EBSD observations revealed that the Ti-20Zr-3Mo-3Sn alloy showed a strong dependence of the solution treatment temperatures on crystallographic texture. SXRD diffraction profiles acquired under cyclic loading/unloading tensile tests clearly illustrated the reversible SIM α" transformation. In addition, the lattice parameters of β and SIM α" phases were measured for each cycle in order to establish the evolution of lattice parameters during the deformation and to calculate the maximum transformation strain for any crystallographic direction. A high recovery strain of 3.5% was obtained by tensile test after a solution treatment at 700°C for 30 minutes. This high recovery strain is due to the fact that the maximum transformation strain is obtained along the tensile direction displaying the favorable <011> β {100} β recrystallization texture. The performance of the Ti-20Zr-3Mo-3Sn alloy is discussed and compared with other superelastic alloys such as NiTi and (Ti-Nb)-based alloys.

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Section: Discussionmentioning

confidence: 99%

Influence of texture and transformation strain on the superelastic performance of a new Ti–20Zr–3Mo–3Sn alloy

Gao

Thibon

Laillé

et al. 2019

Materials Science and Engineering: A

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“…It also plays a prominent role in materials designed to obtain the TRIP or TWIP effects. In fact, if the volume change were strongly reduced, the possibility of attaining a degree of thermoelasticity and pseudoelasticity could be increased, as it is known to occur in Cu-and NiTi-based alloys [35][36][37][38]. Very small volume changes are key to get pseudoelastic properties in Fe-Mn-Al-Ni alloys, as it has been recently reported [39,40], this finding has been extremely noticeable and relevant [41][42][43][44][45][46].…”

Section: Introductionmentioning

confidence: 92%

Role of Mn and Cr on structural parameters and strain energy during FCC-HCP martensitic transformation in Fe-Mn-Cr shape memory alloys

et al. 2018

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“…A cosputtered Ni–Ti–Co thin film library is investigated for SME through the evaluation of the phase transformation. First reported in 1975, the Ni–Ti–Co alloy has since found wide applications: as a component of permanent magnets, − high-entropy alloys, , shape memory alloys, and superalloys , along with substantive use in biomedical applications. − The addition of Co to NiTi has been shown to reduce the M s and A s temperatures in combination with the Ni content; it has also been shown to increase yield strength. , These improvements are sought out in elastocaloric cooling technology where ambient transition temperatures and small thermal hysteresis are desired . Until now, investigations on the structural phases, mechanical properties, elastic properties, and phase transformation behavior that have been reported for Ni–Ti–Co involved one-by-one bulk preparation that covered a limited composition space, with addition of Co investigated only up to 10 at.…”

Section: Introductionmentioning

confidence: 99%

Combinatorial Exploration and Mapping of Phase Transformation in a Ni–Ti–Co Thin Film Library

et al. 2020

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Combinatorial synthesis and high-throughput characterization of a Ni− Ti−Co thin film materials library are reported for exploration of reversible martensitic transformation. The library was prepared by magnetron co-sputtering, annealed in vacuum at 500 °C without atmospheric exposure, and evaluated for shape memory behavior as an indicator of transformation. Composition, structure, and transformation behavior of the 177 pads in the library were characterized using high-throughput wavelength dispersive spectroscopy (WDS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and four-point probe temperature-dependent resistance (R(T)) measurements. A new, expanded composition space having phase transformation with low thermal hysteresis and Co > 10 at. % is found. Unsupervised machine learning methods of hierarchical clustering were employed to streamline data processing of the large XRD and XPS data sets. Through cluster analysis of XRD data, we identified and mapped the constituent structural phases. Composition−structure− property maps for the ternary system are made to correlate the functional properties to the local microstructure and composition of the Ni−Ti−Co thin film library.

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Martensitic transformation strain and stability of Ni50−x–Ti50–Cox (x=3,4) strips obtained by twin-roll casting and standard processing techniques

Cited by 14 publications

References 53 publications

Influence of texture and transformation strain on the superelastic performance of a new Ti–20Zr–3Mo–3Sn alloy

Influence of texture and transformation strain on the superelastic performance of a new Ti–20Zr–3Mo–3Sn alloy

Role of Mn and Cr on structural parameters and strain energy during FCC-HCP martensitic transformation in Fe-Mn-Cr shape memory alloys

Combinatorial Exploration and Mapping of Phase Transformation in a Ni–Ti–Co Thin Film Library

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