Shape memory properties of highly textured Cu–Al–Ni–(Ti) alloys

Sobrero, C.; Roca, P. La; Roatta, A.; Bolmaro, R.E.; Malarrı́a, J.

doi:10.1016/j.msea.2011.12.104

Cited by 37 publications

(18 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Но очевидно, что для широкого применения необходимы объемные материалы с ЭПФ в обычном поликристаллическом состоянии. Однако в данных сплавах традиционные термические или термомеханические обработки не могут обеспечить требуемые физико-механические и эксплуатационные параметры [1,[5][6][7][8][9][10][11][12][13]. Низкая пластичность в поликристаллическом [1][2][3] и даже в монокристаллическом [3,14] состоянии не позволяют практически реализовать ЭПФ, присущие монокристаллам большинства цветных сплавов, включая и β-сплавы на основе меди [2].…”

Section: Introductionunclassified

Применение изотермической осадки для мегапластической деформации beta-сплавов Cu-Al-Ni

Свирид¹,

Лукьянов²,

Pushin³

et al. 2020

Журнал Технической Физики

View full text Add to dashboard Cite

Plastic deformation of the Cu – 14 mass.% Al − 4 mass.% Ni alloy with shape memory effect were used by uniaxial compression (upset), controlled by measurements of the strain rate, applied stress and compression ratio of standard samples under isothermal conditions in temperature range 400–600 ° C. Optical, scanning and transmission electron microscopy and X-ray phase methods analysis where used in the study of changes in the structure of the alloy subjected to mechanical tests. It was found that effects of significant refinement of the grain structure (from 1 mm to 100 μm) and simultaneous increase in strength and ductility due to the process of dynamic recrystallization.

show abstract

Section: Introductionunclassified

Применение изотермической осадки для мегапластической деформации beta-сплавов Cu-Al-Ni

Свирид¹,

Лукьянов²,

Pushin³

et al. 2020

Журнал Технической Физики

View full text Add to dashboard Cite

show abstract

“…Among the aforementioned factors, the aging treatment has been found to be the most significant process for enhancing the shape memory characteristics of the ternary Cu-Al-Ni alloys [11]. The enhancement reason behind the aging treatment is attributed to the formation of precipitates that lead to act as effective obstacles for dislocation movements, thus increasing SME [16]. The size and coherency of the precipitates affect the transition as well as the mechanical strength of the alloy [17].…”

Section: Introductionmentioning

confidence: 99%

X-phase precipitation in aging of Cu–Al–Ni–xTi shape memory alloys and its influence on phase transition behavior

Saud

Hamzah

Abubakar

et al. 2015

J Therm Anal Calorim

View full text Add to dashboard Cite

The present work aims to investigate the aging treatment effects on the microstructure, transition characteristics, and mechanical properties of Cu-Al-Ni-xTi shape memory alloys. The aging treatment of the homogenized and modified alloys of Cu-Al-Ni-xTi results in variations of the martensite morphology, volume fraction, and precipitate size. These variations in the features of precipitates have an obvious effect on transition behavior and mechanical properties. The transition temperatures are increased slightly with an increase in the aging time and temperatures; such increase is mainly attributed to changes in the c 0 1 and b 0 1 morphology and distribution, along with the precipitates. The thermodynamic parameters (DH and DS) tend to decrease with an increase in the aging time and temperatures. Moreover, the brittleness, low strength, and poor processability of Cu-Al-Ni alloys greatly limit their application. We attempted to improve the mechanical properties without losing the thermoelastic properties through the additions of Ti and appropriate aging treatments. The highest tensile strength and strain of 640 MPa and 4.3 % were obtained in alloy of Cu-Al-Ni-0.7 mass% Ti aged at 250°C for 24 h and 100°C for 48 h, respectively. The shape memory behavior of the alloys was studied using a specially designed machine. The strain recovery by shape memory effect of the alloys increases with an increase in the aging tomes and temperature, where the highest recovery (100 %) is obtained with the alloy of Cu-Al-Ni-0.7 mass% Ti after being aged at 250°C for 24 h.

show abstract

“…Cu-based alloys have been widely used as conducting wire of integrate circuit, electrode of resistance welding, generator sets and commutator of electric hand tool and so on due to high strength, good electric conductivity [1][2][3]. With the development of science and technology, based on the premise that the requirement for strength is met, the electrical conductivity is needed to improve as far as possible.…”

Section: Introductionmentioning

confidence: 99%

Effect of High Pressure Heat Treatment on Hardness Electrical Conductivity of a Copper-Based Multiple Alloy

Hong¹,

Chen²,

Liu³

2015

JMSE-B

View full text Add to dashboard Cite

A copper-based multiple alloy was treated at different high pressure and 850 º C for 15 min, and the effect of high pressure heat treatment on the hardness and electrical conductivity of copper-based multiple alloy were studied by electric conductivity instrument and hardness tester. The results show that high pressure heat treatment can increase the hardness and decrease electrical conductivity of the copper-based multiple alloy. After high pressure heat treatment and 500 º C aging for 2 h, its electrical conductivity can be greatly improved, and the improving is obvious with the pressure increasing.

show abstract

Shape memory properties of highly textured Cu–Al–Ni–(Ti) alloys

Cited by 37 publications

References 42 publications

Применение изотермической осадки для мегапластической деформации beta-сплавов Cu-Al-Ni

Применение изотермической осадки для мегапластической деформации beta-сплавов Cu-Al-Ni

X-phase precipitation in aging of Cu–Al–Ni–xTi shape memory alloys and its influence on phase transition behavior

Effect of High Pressure Heat Treatment on Hardness Electrical Conductivity of a Copper-Based Multiple Alloy

Contact Info

Product

Resources

About