Effects of cold and warm rolling on the shape memory response of Ni50Ti30Hf20 high-temperature shape memory alloy

Babacan, N.; Bilal, Muhammad; Hayrettin, C.; Liu, J.; Benafan, Othmane; Караман, И.

doi:10.1016/j.actamat.2018.07.009

Cited by 42 publications

(22 citation statements)

References 50 publications

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“…[77] This indicates that the shape recovery properties of TiNiHf polycrystals can be further improved by optimizing the orientation of grains. TiNiHf alloys have been successfully processed by warm rolling and extrusion, [122] which provides the opportunity to realize the optimization of functional properties. The directional solidification of TiNiHf alloys may be another choice for optimizing the shape recovery properties.…”

Section: Discussionmentioning

confidence: 99%

“…The first attempt to plastically deform a Ni-lean TiNiHf alloy was made by Kockar et al, [21] in which ECAE was employed to process Ti 42 [124] Afterward, the effect of thermomechanical treatment through cold and warm rolling, followed by post-annealing, on the shape recovery properties of the Ti 30 Ni 50 Hf 20 alloy was systematically investigated. [122] The results showed that cold rolling without intermediate annealing could produce the maximum possible thickness reduction, of %15%, before surface cracks were visible. The optimum post-annealing condition was determined to be 550 C for 30 min.…”

Section: Effect Of Thermomechanical Treatment On Shape Memory Propertiesmentioning

confidence: 95%

“…Several strengthening methods have been demonstrated to be suitable for TiNiHf-based alloys, including precipitation strengthening, [74,92,96,121] solid-solution strengthening using quaternary elements, [99,104] grain refinement, [21] and work hardening. [122] 3.5.…”

Section: Shape Memory Properties Of Tinihf-based Alloysmentioning

confidence: 99%

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Recent Development of TiNi‐Based Shape Memory Alloys with High Cycle Stability and High Transformation Temperature

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Section: Discussionmentioning

confidence: 99%

Section: Effect Of Thermomechanical Treatment On Shape Memory Propertiesmentioning

confidence: 95%

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Recent Development of TiNi‐Based Shape Memory Alloys with High Cycle Stability and High Transformation Temperature

2020

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“…Liping WANG, 1) Yulai ZHAO, 2) * Qingyu ZHU, 3) Yang LIU 2) and Qingkai HAN 2) system under warm rolling mechanism has typical nonlinear characteristics, and is easy to cause large vibration, which will reduce the stability of the system and has a great influence on rolling quality. 4) The vibration problem of rolling mill system is a very important issue, and there are many engineering requirements.…”

Section: Nonlinear Vibration Characteristic Analysis Of Roller-plate mentioning

confidence: 99%

“…In warm rolling process, the plasticity, yield strength and deformation resistance of rolled material are very different from those of conventional hot rolling and cold rolling. 3) The dynamics system consisting of rolled products of metal plates and rollers forms a complex nonlinear mechanical coupling under consideration of linearized bearings. In fact, the roller-plate…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Vibration Characteristic Analysis of Roller-Plate System Based on Asymptotic Methods

et al. 2020

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A roller-plate system is taken as the research object in this paper. The influence of rolled products of metal plates (thick or middle thick plate) as an excitation parameter on the vibration characteristics of the system during warm rolling process is mainly studied. In view of the hysteresis characteristics between rolling force and deformation of rolled products of metal plates in actual process, Duffing equation is innovatively introduced into the dynamic model and used to generate nonlinear force. The analytical solution of the dynamic model of the roller-plate system is obtained by asymptotic methods, and the correctness of the analytical solution is verified by Runge-Kutta method. Finally, the influence of nonlinear stiffness and nonlinear damping on vibration characteristics of rollers is analyzed, which provides an important theoretical basis for the study of nonlinear vibration characteristics and vibration suppression of rollerplate system during warm rolling.

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Effect of Rolling on Microstructure Evolution and Plastic Deformation Behavior of A473M Martensitic Stainless Steel

Wang

Zhang

Wang

et al. 2022

steel research int.

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Herein, the surface of A473M martensitic stainless steel is strengthened by rolling processing technology. The microstructure evolution and plastic deformation behavior are characterized by electron backscatter diffraction (EBSD). The experimental results indicate that residual compressive stress will be formed on the surface of A473M steel after rolling, and the maximum value can reach 946 MPa. The surface roughness decreases significantly from 383 to 62.7 nm, which is only 1/5 of the matrix. The microstructure of the rolled samples is obviously refined, and <101>//ND texture is formed. The nanohardness of the hardened layer on the sample surface increases from 2.5 to 4.8 GPa, and the elastic modulus increases from 140 to 217 GPa. Compared with the matrix, the tensile strength and yield strength after rolling are increased by 40% and 22%, respectively. EBSD analysis indicates that the texture of the rolled samples after tensile changed from the <101>//TD direction of the matrix to the <101>//TD and <111>//RD directions.

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Effects of cold and warm rolling on the shape memory response of Ni50Ti30Hf20 high-temperature shape memory alloy

Cited by 42 publications

References 50 publications

Recent Development of TiNi‐Based Shape Memory Alloys with High Cycle Stability and High Transformation Temperature

Recent Development of TiNi‐Based Shape Memory Alloys with High Cycle Stability and High Transformation Temperature

Nonlinear Vibration Characteristic Analysis of Roller-Plate System Based on Asymptotic Methods

Effect of Rolling on Microstructure Evolution and Plastic Deformation Behavior of A473M Martensitic Stainless Steel

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