Design of a NiTiHf shape memory alloy with an austenite finish temperature beyond 400 °C utilizing artificial intelligence

Catal, A.A.; Bedir, E.; Yilmaz, R.; Canadinç, D.

doi:10.1016/j.jallcom.2022.164135

Cited by 17 publications

(10 citation statements)

References 70 publications

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“…210,211 The predictive design and assessment of SMAs through the application of data-driven techniques such as machine learning and artificial intelligence is also steadily gaining momentum in recent years. 81,[212][213][214] The complete understanding of the non-linear nature of the phase transformation seen in SMA still requires comprehensive research and experimentation. Deeper insight into the unique properties of SMAs accumulated with the gradual development of technology and extensive research is essential for greater biomedical advancements in the future.…”

Section: Discussionmentioning

confidence: 99%

The role of NiTi shape memory alloys in quality of life improvement through medical advancements: A comprehensive review

Nair

Radhika

2022

Proc Inst Mech Eng H

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The significance of advanced smart materials in recent technological research and advancement is apparent from its extensive use in present day devices and instruments. Of the various smart materials in use today, the fascinating category of shape memory alloys (SMAs) is equipped with the ability to return to a previously memorized shape under certain thermomechanical or magnetic stimuli. The unique property of shape memory effect and superelasticity displayed by these materials along with good biocompatibility and corrosion resistance make them ideal for biomedical applications. The various applications of SMAs in surgical instruments, surgical implants, and assistive and rehabilitative devices have significant effect on the day to day life of people in the present age. Majority of these biomedical devices belong to the orthodontic, orthopedic, or surgical fields. Other remarkable applications of SMAs such as in the production of prostheses and orthoses designed through the biomimetic approach are also highly influential in improving the quality of life. The present paper provides an overview of the various properties of shape memory alloys and their applications in the biomedical field over the years, that have had a significant impact on the realm of medical science.

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Section: Discussionmentioning

confidence: 99%

The role of NiTi shape memory alloys in quality of life improvement through medical advancements: A comprehensive review

Nair

Radhika

2022

Proc Inst Mech Eng H

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“…alloy development studies [12,24,34,37,38]. Their adopted ML models have the capacity to reveal various possible input-output relationships including linear, nonlinear, polynomial, and nonparametric, which cover simple to complex relationships.…”

Section: Machine Learning Techniquesmentioning

confidence: 99%

“…To date, a limited effort is devoted to the ML development of NiTiHf alloys for high-temperature actuators except a few latest studies [24,37,38]. This has led to the current initiative to identify new NiTiHf alloy compositions with balanced performance in terms of Ms, transformation hysteresis TH and WO.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

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Machine learning guided alloy design of high-temperature NiTiHf shape memory alloys

Kankanamge

Reiner

et al. 2022

J Mater Sci

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With the increasing use of CubeSats in space exploration, the demand for reliable high-temperature shape memory alloys (HTSMA) continues to grow. A wide range of HTSMAs has been investigated over the past decade but finding suitable alloys by means of trial-and-error experiments is cumbersome and time-consuming. The present work uses a data-driven approach to identify NiTiHf alloys suitable for actuator applications in space. Seven machine learning (ML) models were evaluated, and the best fit model was selected to identify new alloy compositions with targeted transformation temperature (Ms), thermal hysteresis, and work output. Of the studied models, the K-nearest neighbouring ML model offers more reliable and accurate prediction in developing NiTiHf alloys with balanced functional properties and aids our existing understanding on compositional dependence of transformation temperature, thermal hysteresis and work output. For instance, the transformation temperature of NiTiHf alloys is more sensitive to Ni variation with increasing Hf content. A maximum Ms reduction rate of 6.12 °C per 0.01 at.% Ni is attained at 30 at.% Hf, and with a Ni content between 50 and 51 at.%. Graphical abstract

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“…TiNiHf alloys seem to be more attractive for wide practical application because they perform required mechanical and functional properties in combination with relatively low cost and greater stability of the operational characteristics as compared to TiNiZr alloys [ 15 ]. Therefore, to date, numerous studies of TiNiHf alloys revealed the main features of the formation of their structural state and properties [ 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 ]. Ternary TiNiHf alloys are usually divided into two groups, one with increased Ni content and one with reduced Ni content, similarly to binary TiNi SMAs.…”

Section: Introductionmentioning

confidence: 99%

Production, Mechanical and Functional Properties of Long-Length TiNiHf Rods with High-Temperature Shape Memory Effect

et al. 2023

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In the present work, the possibility of manufacturing long-length TiNiHf rods with a lowered Hf content and a high-temperature shape memory effect in the range of 120–160 °C was studied. Initial ingots with 1.5, 3.0 and 5.0 at.% Hf were obtained by electron beam melting in a copper water-cooled stream-type mold. The obtained ingots were rotary forged at the temperature of 950 °C, with the relative strain from 5 to 10% per one pass. The obtained results revealed that the ingots with 3.0 and 5.0 at.% Hf demonstrated insufficient technological plasticity, presumably because of the excess precipitation of (Ti,Hf)2Ni-type particles. The premature destruction of ingots during the deformation process does not allow obtaining high-quality long-length rods. A long-length rod with a diameter of 3.5 mm and a length of 870 mm was produced by rotary forging from the ingot with 1.5 at.% Hf. The obtained TiNiHf rod had relatively high values of mechanical properties (a dislocation yield stress σy of 800 MPa, ultimate tensile strength σB of 1000 MPa, and elongation to fracture δ of 24%), functional properties (a completely recoverable strain of 5%), and a required finishing temperature of shape recovery of 125 °C in the as-forged state and of 155 °C after post-deformation annealing at 550 °C for 2 h.

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Design of a NiTiHf shape memory alloy with an austenite finish temperature beyond 400 °C utilizing artificial intelligence

Cited by 17 publications

References 70 publications

The role of NiTi shape memory alloys in quality of life improvement through medical advancements: A comprehensive review

The role of NiTi shape memory alloys in quality of life improvement through medical advancements: A comprehensive review

Machine learning guided alloy design of high-temperature NiTiHf shape memory alloys

Production, Mechanical and Functional Properties of Long-Length TiNiHf Rods with High-Temperature Shape Memory Effect

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