Influence of Hafnium Concentration on Mechanical and Thermomechanical Characteristics of Ni–Ti–Hf System Alloys with High-Temperature Shape Memory Effect

IF 0.3 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Inorganic Materials: Applied Research Pub Date : 2025-08-02 DOI:10.1134/S2075113325701151

N. N. Popov, D. A. Kaydarov, D. V. Presnyakov, T. A. Morozova, A. A. Kostyleva

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Abstract

Comprehensive studies on the influence of hafnium concentration in the range from 2.7 to 5.3 at % on the mechanical and thermomechanical characteristics of the properties of Ni–Ti–Hf alloys with high-temperature shape memory effect on samples made of strips with a thickness from 1.9 to 2.46 mm after high-temperature annealing in vacuum are carried out. For the specified alloys, high mean values of strength (σ_B = 1030 MPa) and plasticity (δ_res from 38 to 29%) characteristics are obtained. By means of annealing in vacuum and the selection of conditions for inducing deformation, it becomes possible to obtain thermomechanical characteristics that meet the requirements for creating safety devices for nuclear power facilities: temperatures of the beginning and end of shape recovery above 100°C (A_{s SME} from 117 ± 4 to 131 ± 4°C, A_{f SME} from 139 ± 4 to 150 ± 3°C), a fairly narrow range of shape recovery temperatures (|A_{s SME}–A_{f SME}| = 20 ± 1°C), the value of thermally reversible deformation during the manifestation of the SME of more than 3% (ε_SME from 3.2 ± 0.2 to 4.3 ± 0.9%), the degree of shape recovery of more than 40% (η_SME from 38 ± 3 to 54 ± 13%).

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铪浓度对具有高温形状记忆效应的Ni-Ti-Hf系合金力学和热力学特性的影响

在1.9 ~ 2.46 mm厚的带材经真空高温退火后，对2.7 ~ 5.3 at %的铪浓度对具有高温形状记忆效应的Ni-Ti-Hf合金的力学和热力学特性的影响进行了全面研究。合金的强度（σB = 1030 MPa）和塑性（δres为38% ~ 29%）均有较高的平均值。通过真空退火和选择诱导变形的条件，可以获得满足制造核电设施安全装置要求的热力特性：形状复苏的开始和结束的温度高于100°C(如中小企业从117±4到131±4°C,房颤中小企业从139±4到150±3°C),一个狭小的形状恢复温度范围内(| SME-Af中小企业| = 20±1°C),热可逆变形期间表现的价值超过3%的中小企业(ε中小企业从3.2±0.2到4.3±0.9%),形状恢复的程度超过40%(η中小企业从38±3 - 54±13%)。

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来源期刊

Inorganic Materials: Applied Research Engineering-Engineering (all)

CiteScore

0.90

自引率

0.00%

发文量

199

期刊介绍： Inorganic Materials: Applied Research contains translations of research articles devoted to applied aspects of inorganic materials. Best articles are selected from four Russian periodicals: Materialovedenie, Perspektivnye Materialy, Fizika i Khimiya Obrabotki Materialov, and Voprosy Materialovedeniya and translated into English. The journal reports recent achievements in materials science: physical and chemical bases of materials science; effects of synergism in composite materials; computer simulations; creation of new materials (including carbon-based materials and ceramics, semiconductors, superconductors, composite materials, polymers, materials for nuclear engineering, materials for aircraft and space engineering, materials for quantum electronics, materials for electronics and optoelectronics, materials for nuclear and thermonuclear power engineering, radiation-hardened materials, materials for use in medicine, etc.); analytical techniques; structure–property relationships; nanostructures and nanotechnologies; advanced technologies; use of hydrogen in structural materials; and economic and environmental issues. The journal also considers engineering issues of materials processing with plasma, high-gradient crystallization, laser technology, and ultrasonic technology. Currently the journal does not accept direct submissions, but submissions to one of the source journals is possible.