Long-term corrosion resistance of Cu-Al-Mn superelastic alloys and steel rebar for use in bridges

Hong, Huanpeng; Gencturk, Bora; Brown, Susan Alexis; Hosseini, Farshid; Jain, Amit; Aryan, Hadi; Saiidi, Saiid; Araki, Yoshikazu; Kise, Sumio

doi:10.1016/j.conbuildmat.2022.128795

Cited by 10 publications

(3 citation statements)

References 49 publications

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“…Additionally, CAM SMAs have excellent low-cycle fatigue resistance (able to withstand over 50,000 ve percent strain cycles (Hong et al, 2022a)). Lower cost of CAM SMAs is particularly important in civil engineering applications where the material costs largely drive project feasibility and pro tability (Hong et al, 2022b). The application of CAM SMAs to improve the seismic performance of buildings and bridges have also been investigated in a number of studies (Raza et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Machinability of Cu-Al-Mn Shape Memory Alloys

Hong

Gencturk

Araki

et al. 2023

Preprint

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Section: Introductionmentioning

confidence: 99%

Machinability of Cu-Al-Mn Shape Memory Alloys

Hong

Gencturk

Araki

et al. 2023

Preprint

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“…Due to their excellent strain recovery and energy dissipating capacity, superelastic alloys (SEAs) have been studied as column reinforcement, bracing systems, and energy dissipating devices for improving the seismic performance of structures [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] ,. The low-cycle fatigue behavior of SEAs is of vital importance in these applications.…”

Section: Introductionmentioning

confidence: 99%

Low-cycle fatigue behavior of Cu–Al–Mn superelastic alloys at different temperatures

Hong¹,

Gencturk²,

Aryan³

et al. 2022

Smart Mater. Struct.

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Superelastic alloy (SEA) bars are widely used in structures subjected to moderate and strong earthquakes. Compared with conventional nickel-titanium (NiTi) SEAs, Cu-Al-Mn (CAM) SEAs has received increasing attention recently due to their cost-effectiveness and easier machinability. The authors’ previous research showed that despite their lower strength and limitations in the maximum length, the CAM SEAs have comparable superelastic strain recovery, a wider temperature range, and superior strain rate stability compared to NiTi SEAs. However, the previous research was limited to a few specimens and only conducted to a few hundred cycles without considering the full deterioration in the material properties. Besides, the existing research on CAM SEA was only limited to small sample sizes at room temperature, while the fatigue performance of large diameter CAM SEAs under low and high temperatures relevant for civil engineering structures has not been reported. To fill this knowledge gap, low-cycle fatigue performance of 20 mm diameter CAM SEAs was studied at room temperature 25℃, low temperature, -40℃, and high temperature, 50℃. Both single crystal and polycrystal CAM SEA were investigated to determine their feasibility as concrete reinforcement under repeated high strain loading cycles expected during an earthquake. Strain cycles up to 50,000 have been applied at a tensile strain amplitude of 5%. Variations in the superelastic properties were observed and analyzed, including the stress-strain curves, elastic modulus, transformation stresses, damping ratio and recovery strain. Stable hysteresis has been observed for cycles exceeding tens of thousands at all temperatures demonstrating the suitability of CAM SEAs for seismic applications in civil engineering structures.

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“…In particular, copper-based alloys are traditionally used as materials for tribo-conjugations and friction units. Among all copper alloys, it is worth noting such an important class of materials as the shape memory alloys (SMA), the interest in which has recently increased [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Structure and Mechanical Properties of Cu–Al–Mn Alloys Fabricated by Electron Beam Additive Manufacturing

2022

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In this work, the method of electron beam additive manufacturing (EBAM) was used to fabricate a Cu-based alloy possessing a shape memory effect. Electron beam additive technology is especially relevant for copper and its alloys since the process is carried out in a vacuum, which makes it possible to circumvent oxidation. The main purpose of the study was to establish the influence of the printing parameters on the structure of the obtained products, their phase composition, mechanical properties, dry friction behavior, and the structure-phase gradient that formed in Cu–Al–Mn alloy samples during electron beam layer-by-layer printing. The results of the study allowed us to reveal that the structure-phase composition, the mechanical properties, and the tribological performance of the fabricated material are mainly affected by the magnitude of heat input during electron beam additive printing of Cu–Al–Mn alloy. High heat input values led to the formation of the β1′ + α decomposed structure. Low heat input values enabled the suppression of decomposition and the formation of an ordered 1 structure. The microhardness values were distributed on a gradient from 2.0 to 2.75 GPa. Fabricated samples demonstrated different behaviors in friction and wear depending on their composition and structure, with the value of the friction coefficient lying in the range between 0.1 and 0.175.

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Long-term corrosion resistance of Cu-Al-Mn superelastic alloys and steel rebar for use in bridges

Cited by 10 publications

References 49 publications

Machinability of Cu-Al-Mn Shape Memory Alloys

Machinability of Cu-Al-Mn Shape Memory Alloys

Low-cycle fatigue behavior of Cu–Al–Mn superelastic alloys at different temperatures

Structure and Mechanical Properties of Cu–Al–Mn Alloys Fabricated by Electron Beam Additive Manufacturing

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