热处理对具有高温形状记忆效应的 Ti50Pd30Ni20 合金的机械和热机械特性的影响

IF 0.4 Q4 METALLURGY & METALLURGICAL ENGINEERING
N. N. Popov, D. V. Presnyakov, I. S. Ryzhov, A. A. Kostyleva
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引用次数: 0

摘要

摘要--研究了 600°C 退火对具有高温形状记忆效应 (SME) 的 Ti50Pd30Ni20 合金的机械和热机械特性的影响。在 600°C 退火后,获得了最佳的强度(σu = 1030 ± 140 MPa)和塑性(\(\varepsilon _{0}^{\max }}\) = 11.5 ± 6.0%,δres = 6 ± 4%)特性。在温度td =235-230°C、应变率\(\dot {\varepsilon }\) ≈ 2.8 × 10-3 s-1的初步诱导拉伸变形后,在600°C退火后可获得最大热恢复应变(εSME = 4.3%)和最大形状恢复程度(ηSME = 67%);在这种情况下,表征主要形状恢复的反马氏体转变温度为AsSME = 220°C和AfSME = 249°C。考虑到之前进行的研究,我们发现马氏体转变温度几乎呈线性增长,反之,当钛镍化物中钯的含量在 30% 至 50% 之间时,SME 和形状恢复程度会降低。得出了线性回归方程。所获得的结果可用于设计安全装置,例如横切式和推动式安全装置。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Influence of Heat Treatment on the Mechanical and Thermomechanical Characteristics of a Ti50Pd30Ni20 Alloy with High-Temperature Shape Memory Effect

Influence of Heat Treatment on the Mechanical and Thermomechanical Characteristics of a Ti50Pd30Ni20 Alloy with High-Temperature Shape Memory Effect

Abstract—The influence of annealing at 600°C on the mechanical and thermomechanical characteristics of a Ti50Pd30Ni20 alloy with high-temperature shape memory effect (SME) is studied. The best strength (σu = 1030 ± 140 MPa) and plastic (\(\varepsilon _{0}^{{\max }}\) = 11.5 ± 6.0%, δres = 6 ± 4%) characteristics have been obtained after annealing at 600°C. The maximum thermally recoverable strain (εSME = 4.3%) and the maximum degree of shape recovery (ηSME = 67%) are achieved after annealing at 600°C after preliminary induced tensile deformation at temperatures td =235–230°C and a strain rate \(\dot {\varepsilon }\) ≈ 2.8 × 10–3 s–1; in this case, the reverse martensitic transformation temperatures characterizing the main shape recovery are AsSME = 220°C and AfSME = 249°C. Taking into account the studies carried out before, we found that the martensitic transformation temperatures increase almost linearly and, conversely, the SME and the degrees of shape recovery decrease as the titanium nickelide is alloyed with palladium in the content range from 30 to 50 at %. Linear regression equations are derived. The results obtained are used for designing safety devices of, e.g., crosscutting and pushing types.

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来源期刊
Russian Metallurgy (Metally)
Russian Metallurgy (Metally) METALLURGY & METALLURGICAL ENGINEERING-
CiteScore
0.70
自引率
25.00%
发文量
140
期刊介绍: Russian Metallurgy (Metally)  publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.
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