Effect of Heat Treatment on Microstructural Changes in Aluminium Bronze

Hájek, Jiří; Kříž, Antonín; Chocholatý, Ondřej; Pakuła, D.

doi:10.1515/amm-2016-0210

Cited by 6 publications

(5 citation statements)

References 3 publications

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“…Different phases such as α-phase, several κ-phases, and retained β phase are there in Al-bronze. The specific phases also refine the grain structure [47]. Cu-Zn alloy shows a single-phase fcc condition because the level of Zn content is below 35 wt.%.…”

Section: Optical Micrographic Observationmentioning

confidence: 95%

Electrochemical corrosion performance of copper and uniformly alloyed bronze and brass in 0.1 M NaCl solution

Abdullah Khan,

Kaiser,

Kaiser

2023

Rev. Mex. Fís.

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The influence of Al and Zn by 10 wt.% as alloying elements on the electrochemical corrosion behaviour of Cu-based alloy in 0.1 M NaCl solution is examined. Results from both electrochemical impedance spectroscopy method and potentiodynamic techniques indicate that the corrosion occurred at a higher rate for Zn and Al added alloys than pure Cu, where Zn added alloy shows the worst corrosion performance. Copper forms stable a protective layer of Cu2O, and CuO, as a result, has a lower corrosion rate. In case of Al and Zn added alloys, dealloying, as well as dissolution of additional Al2O3 and ZnO are responsible for higher corrosion rates, respectively. The surfaces are investigated by optical and scanning electron microscopy. Phases of different intermetallics within the Cu matrix are identified in the etched optical micrographs of the experimental alloys. The optical images after corrosion depict layers of oxides on the surfaces where the Zn-added alloys are highly affected, followed by Al-added alloys and pure Cu. Increased amounts of internal damage to the surface of the Zn-added alloy are visible in the SEM images. The EDX spectrum not only supports the presence of oxide layers but also claims that Zn-containing particles are dissolved at a greater rate than Al.

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Section: Optical Micrographic Observationmentioning

confidence: 95%

Electrochemical corrosion performance of copper and uniformly alloyed bronze and brass in 0.1 M NaCl solution

Abdullah Khan,

Kaiser,

Kaiser

2023

Rev. Mex. Fís.

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“…However, during a DED-LB process, this precipitation process is suppressed due to the rapid cooling. As a result, a martensitic-like structure is generated (compare Hájek et al [14]) that mainly consists of fine needles in the β'-phase and leads to the elevated hardness of the additive specimen.…”

Section: Microstructure and Mechanical Propertiesmentioning

confidence: 99%

Using ultrasonic atomization to recycle aluminium bronze chips for additive laser directed energy deposition

Müller,

Fasselt,

Kruse

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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In the post-processing of large maritime components, a considerable amount of waste in the form of milling and grinding chips is produced. At the same time, additive manufacturing technologies have shown great potential in producing high-volume parts for maritime applications, allowing novel design approaches and short lead times. In this context, this study presents a sustainable approach to recycle and use aluminium bronze waste material, generated during post-processing of large cast ship propellers, as feedstock for laser-powder directed energy deposition. The recycling technology used to produce powder batches is inductive re-melting in combination with ultrasonic atomization. The derived metal powders are characterized using digital image analysis, powder flowability tests, scanning electron microscopy as well as energy dispersive X-ray spectroscopy. Compared to conventional metal powders produced by gas atomization, the recycled material shows excellent sphericity and a powder size distribution with a higher content of finer and coarser particles. Metallographic sections of deposited additively produced specimens show an increased hardness and reduced ductility, but also competitive densities and higher yield and ultimate tensile strength compared to cast material. The process chain shows high potential for the maritime sector to enable circular and sustainable manufacturing.

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“…Aaltonen et al [11] examined the effect of tempering on the dealloying corrosion resistance of two bronzes and established that the corrosion resistance of Cu-Al-Fe-Ni bronze is much better than that of Cu-Al-Fe-Mn bronze. Hajek et al [15] established the optimal HT procedure for the highest possible corrosion resistance in Cu-Al-Fe-Mn bronze. Ciurdas et al [16] studied the corrosion resistance of heat-treated Cu-Al-Fe-Mn bronze and reported that the hardened sample showed the best resistance to galvanic corrosion.…”

Section: Refmentioning

confidence: 99%

“…Detailed information about the effects of HT on the microstructure of complex aluminium bronzes is contained in the review paper composed by Brezina [1]. The dependence between the HT parameters and microstructure of individual types of Cu-Al-X bronze with β-transformation has been studied by numerous authors: Cu-9Al-4Fe [3][4][5], Cu-Al-Ni-Fe [6][7][8][9][10][11][12][13][14], Cu-Al-Fe-Mn [11,[15][16][17], Cu-Al-Fe-Be [12]. Changing the microstructure by performing HTs on the complex aluminium bronzes also changes the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effects of Heat Treatment and Severe Surface Plastic Deformation on Mechanical Characteristics, Fatigue, and Wear of Cu-10Al-5Fe Bronze

et al. 2022

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Aluminium bronzes are widely used in various industries because of their unique properties, a combination of high strength, wear resistance, and corrosion resistance in aggressive environments, including seawater. In this study, the subject of comprehensive experimental research was Cu-10Al-5Fe iron-aluminium bronze (IAB) with β-transformation, received in the form of hot-rolled bars. The effects of different heat treatments (HT) and severe surface plastic deformation (SPD), conducted by diamond burnishing (DB) on the microstructure, surface integrity (SI), mechanical properties, low- and mega-cycle fatigue strength, and dry sliding wear resistance, were determined. Based on quantitative indicators, the applied heat treatments in combination with severe SPD were compared. Thus, the integral efficiency of the heat treatments was evaluated, and the heat treatments were correlated with the resulting properties and operational behaviour of Cu-10Al-5Fe IAB. For example, if the component is designed for rotational bending conditions, the combination of quenching at 920 °C in water, subsequent tempering at 300 °C for three hours, and DB provides maximum fatigue strength in both low-cycle and mega-cycle fatigue applications.

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Effect of Heat Treatment on Microstructural Changes in Aluminium Bronze

Cited by 6 publications

References 3 publications

Electrochemical corrosion performance of copper and uniformly alloyed bronze and brass in 0.1 M NaCl solution

Electrochemical corrosion performance of copper and uniformly alloyed bronze and brass in 0.1 M NaCl solution

Using ultrasonic atomization to recycle aluminium bronze chips for additive laser directed energy deposition

Effects of Heat Treatment and Severe Surface Plastic Deformation on Mechanical Characteristics, Fatigue, and Wear of Cu-10Al-5Fe Bronze

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