Microstructure and Shape Memory Effect of Cu-Al-Be-Mn Quaternary Shape Memory Alloys

Shivasiddaramaiah, A.G.; Prashant, S H; Manjunath, S.Y.; Mallikarjun, U.S.

doi:10.4028/www.scientific.net/amm.813-814.213

Cited by 7 publications

(10 citation statements)

References 6 publications

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“…Small bits of copper (Cu), aluminum (Al), and beryllium (Be), each weighing about 100 g for the chosen composition, were taken and then converted to the molten state in an induction furnace. The molten alloy was given time to harden in a permanent mold that measured 150 mm × 100 mm × 5 mm [ 22 , 23 , 24 ]. The ingots that were produced were subsequently homogenized.…”

Section: The Copper-aluminum-beryllium (Cu-al-be)-based Shape Memory ...mentioning

confidence: 99%

“…Identical samples were rolled to a thickness of about 1 mm at 900 °C. The test samples were then subjected to the following treatment: Betatized for a full 30 min at 900 °C; Step-cooled in water that was boiling (100 °C); Finally cooled in a tub containing water at approximately 30 °C [ 25 ]. …”

Section: The Copper-aluminum-beryllium (Cu-al-be)-based Shape Memory ...mentioning

confidence: 99%

“…The sample essentially served as the anode, while titanium served as the cathode, with their separation being a distance of 45 mm. With a current of 120 amps and a DC bias voltage of 0.6 kV, the process was permitted to operate for a full 25 min [ 26 , 27 , 28 , 29 ].…”

Section: The Copper-aluminum-beryllium (Cu-al-be)-based Shape Memory ...mentioning

confidence: 99%

“…(i) Betatized for a full 30 min at 900 °C; (ii) Step-cooled in water that was boiling (100 °C); (iii) Finally cooled in a tub containing water at approximately 30 °C [25].…”

Section: Experimental Workmentioning

confidence: 99%

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Environment-Induced Degradation of Shape Memory Alloys: Role of Alloying and Nature of Environment

Santosh,

Harris,

Srivatsan

2023

Materials

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Shape memory effects coupled with superelasticity are the distinctive characteristics of shape memory alloys (SMAs), a type of metal. When these alloys are subject to thermomechanical processing, they have the inherent ability to react to stimuli, such as heat. As a result, these alloys have established their usefulness in a variety of fields and have in recent years been chosen for use in stents, sensors, actuators, and several other forms of life-saving medical equipment. When it comes to the shape memory materials, nickel–titanium (Ni-Ti) alloys are in the forefront and have been chosen for use in a spectrum of demanding applications. As shape memory alloys (SMAs) are chosen for use in critical environments, such as blood streams (arteries and veins), orthodontic applications, orthopedic implants, and high temperature surroundings, such as actuators in aircraft engines, the phenomenon of environment-induced degradation is of both interest and concern. Hence, the environment-induced degradation behavior of the shape memory alloys (SMAs) needs to be studied to find viable ways to improve their resistance to an aggressive environment. The degradation that occurs upon exposure to an aggressive environment is often referred to as corrosion. Environment-induced degradation, or corrosion, being an unavoidable factor, certain techniques can be used for the purpose of enhancing the degradation resistance of shape memory alloys (SMAs). In this paper, we present and discuss the specific role of microstructure and contribution of environment to the degradation behavior of shape memory alloys (SMAs) while concurrently providing methods to resist both the development and growth of the degradation caused by the environment.

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Section: The Copper-aluminum-beryllium (Cu-al-be)-based Shape Memory ...mentioning

confidence: 99%

Section: The Copper-aluminum-beryllium (Cu-al-be)-based Shape Memory ...mentioning

confidence: 99%

Section: The Copper-aluminum-beryllium (Cu-al-be)-based Shape Memory ...mentioning

confidence: 99%

“…(i) Betatized for a full 30 min at 900 °C; (ii) Step-cooled in water that was boiling (100 °C); (iii) Finally cooled in a tub containing water at approximately 30 °C [25].…”

Section: Experimental Workmentioning

confidence: 99%

See 2 more Smart Citations

Environment-Induced Degradation of Shape Memory Alloys: Role of Alloying and Nature of Environment

Santosh,

Harris,

Srivatsan

2023

Materials

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show abstract

“…Among copper-based SMAs Cu-Zn-Al, Cu-Al-Ni are commercially available due to their proven mechanical properties. Cu-Al-Mn and Cu-Al-Be are recently studied and exhibit excellent shape memory properties at room temperature (Mallik and Sampath, 2015; Shivasiddaramaiah et al , 2015). Influence of phases on SME in Cu-Al-Mn and Cu-Al-Ni SMAs indicated that control over composition could improve their shape memory properties (Dasgupta and Pandey, 2019).…”

Section: Introductionmentioning

confidence: 99%

Effect of alloying constituents on thermal, microstructural, mechanical and shape memory properties of Cu-Al-Ag shape memory alloys

Tataverthi¹,

Devisetty²

2022

WJE

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Purpose The purpose of this study is to assess the influence of Al and Ag addition on thermal, mechanical and shape memory properties of Cu-Al-Ag alloy. Design/methodology/approach The material is synthesized in a controlled atmosphere to minimize the reaction of alloying elements with the atmosphere. Cast samples were homogenized, then subjected to hot rolling and further betatized, followed by step quenching. Eight samples were chosen for study among which first four samples varied in Al content, and the next set of four samples varied in Ag composition. Findings The testing yielded a result that the increase in binary alloying element decreased transformation temperature range but increased entropy and elastic energy values. It also improved the shape memory effect and mechanical properties (UTS and hardness). An increase in ternary alloying element increased transformation temperature range, entropy and elastic energy values. The shape memory effect and mechanical properties are enhanced by the increase in ternary alloying element. The study revealed that compositional variation of Al should be limited to a range of 8 to 14 Wt.% and Ag from 2 to 8 Wt.%. Microstructural and diffraction studies identified the ß’1 martensite as a desirable phase for enhancing shape memory properties. Originality/value Numerous studies have been made in exploring the transformation temperature and phase formation for similar Cu-Al-Ag shape memory alloys, but their influence on shape memory effect was not extensively studied. In the present work, the influence of Al and Ag content on shape memory characteristics is carried out to increase the design choice for engineering applications of shape memory alloy. These materials exhibit mechanical and shape memory properties within operating ranges similar to other copper-based shape memory alloys.

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Evaluation of corrosion behaviour of Cu-Al-Be-Mn Quaternary shape memory alloys

Shivasiddaramaiah¹,

Mallik²,

Mahato³

et al. 2017

Materials Today: Proceedings

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Microstructure and Shape Memory Effect of Cu-Al-Be-Mn Quaternary Shape Memory Alloys

Cited by 7 publications

References 6 publications

Environment-Induced Degradation of Shape Memory Alloys: Role of Alloying and Nature of Environment

Environment-Induced Degradation of Shape Memory Alloys: Role of Alloying and Nature of Environment

Effect of alloying constituents on thermal, microstructural, mechanical and shape memory properties of Cu-Al-Ag shape memory alloys

Evaluation of corrosion behaviour of Cu-Al-Be-Mn Quaternary shape memory alloys

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