Effect of Sn addition on morphology evolution of secondary phase in hypomonotectic Cu-Pb-Sn alloy during solidification

Dong, Bowen; Jie, Jinchuan; Yao, X.X.; Liu, S.C.; Chen, Y.H.; Zhong, Ning; Li, T.J.

doi:10.1016/j.jallcom.2019.03.388

Cited by 25 publications

(8 citation statements)

References 32 publications

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“…Through a cross-sectional SEM observation, as shown in Figure 3A, bright white Pb particles with dispersion distribution can be identified inside the cladding layer. Due to the presence of a certain amount of Pb in the nickel-al-bronze alloy, monotectic crystals occur due to the influence of the high degree of undercooling during solidification, and the Pb-rich secondary phase particles are formed (Dong et al, 2019). Furthermore, the EDS analysis results (Figure 3B) and XRD analysis (Figure 3C) proved the existence of Pb phase.…”

Section: Microstructural Analysismentioning

confidence: 87%

Microstructure and Mechanical Properties of Additively Manufactured Ni-Al Bronze Parts Using Cold Metal Transfer Process

Wang

Zhao²,

Chang³

et al. 2021

Front. Mater.

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In this paper, the microstructure and mechanical properties of the SG-CuAl8Ni6 Ni-Al bronze straight wall were studied, which was fabricated by the cold metal transfer (CMT) arc additive manufacturing technology. This Ni-Al bronze cladding layer of SG-CuAl8Ni6 is composed mainly of α-Cu, residual β phase, rich Pb phase and κ phase. The microstructure of this multilayer single-channel Ni-Al bronze straight wall circulating presents the overall periodic law, which changes from fine cellular crystals, columnar crystals to dendritic crystals with the increase of the distance from the substrate. The Vickers hardness value of the Ni-Al bronze straight wall decreases with the distance of substrate are between 155 and 185 HV0.5. The microhardness and elastic modulus of the Ni-Al bronze specimen are 1.57 times and 1.99 times higher than these of the brass matrix, respectively. The ultimate tensile strength (UTS) of the straight wall in the welding direction and 45° downward-sloping is greater than that of about 550 MPa in the stacking direction, and the elongation value in the welding direction is the highest. With the increase in interlayer temperature, the grain size increased gradually, and the tensile strength decreases slightly.

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Section: Microstructural Analysismentioning

confidence: 87%

Microstructure and Mechanical Properties of Additively Manufactured Ni-Al Bronze Parts Using Cold Metal Transfer Process

Wang

Zhao²,

Chang³

et al. 2021

Front. Mater.

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“…Copper-based functional layers are particularly well suited for low-speed and heavy-duty applications in wind turbines owing to their excellent tribological characteristics, good thermal conductivity, high load-bearing capacity, and high fatigue strength. [3][4][5] In light of the advances in lead-free materials, the antifriction layer fabricated by adding graphite, Bi, FeS, and other lubrication components to an Sn bronze matrix is regarded as the ideal bearing material. [6,7] However, austenite transformation occurs in steel near the liquid-solid compound interface of Sn bronze and low-carbon steel.…”

Section: Introductionmentioning

confidence: 99%

Effect of Al Bronze Interlayer on Liquid–Solid Compound Interface of Sn Bronze/Steel

Wang

Chen

et al. 2023

Adv Eng Mater

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To address the challenges of liquid metal embrittlement (LME) cracks and low bonding strength at the Sn bronze/steel liquid–solid compound interface, an innovative Sn bronze/Al bronze/steel laminated composite is fabricated using a wire arc additive manufacturing (WAAM) process, which involved introducing an Al bronze interlayer. The microstructure of interlayer and its related interfaces, as well as the mechanical properties of the composites, are investigated. Results show that the microstructure of Al bronze is mainly composed of α‐Cu and β‐Cu3Al. An interdiffused layer with a maximum thickness of 5 μm exists at the Al bronze/steel interface, which plays an important role in interface adaptation. The Sn bronze/Al bronze interface possesses a 30 μm α(Cu–Al–Fe) transition layer, and the continuous transition of α + β → α(Cu–Al–Fe) → α(Cu–Sn) from the base material to the clad layer is realized. No LME cracks are found in the steel after the Al bronze and Sn bronze deposition. The Al bronze/steel and Sn bronze/Al bronze interfaces exhibit strong bonding strengths of 395 and 361 MPa, respectively.

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“…Yang et al 16 found that the microstructure of the Al 92 Bi 8 monotectic alloy could be refined by adding Sn, Si, and Cu together, and the mechanical properties of the alloy have been improved significantly. Dong et al 17 indicated from the thermodynamic calculation that Sn addition could weaken the demixing tendency in the Cu−Pb system, which was helpful to obtain fine and dispersed second phase particles. Ho-Joon Moon 18 revealed that the addition of Zr was highly effective to activate γ-Fe nucleation by decreasing the mixing enthalpy and also accelerating heterogeneous nucleation in Cu−Fe monotectic alloys.…”

Section: Introductionmentioning

confidence: 99%

Effects of Co Addition on Microstructure Evolution and Efficient Hydrogen Evolution of Self-Supported Fe–P@Cu Immiscible Alloy

Zuo

Xia

et al. 2023

ACS Appl. Eng. Mater.

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In this article, the effects of Co addition on microstructure evolution and catalytic efficiency variation of an Fe−P@Cu immiscible alloy were systematically studied. According to the first-principles molecular dynamics simulations, it was found that P in the Fe−P@Cu alloy with Co addition would be preferentially bonded with Fe and/or Co in the first coordination shell, and Cu and (Fe+Co) atoms tended to appear on the opposite side of P atom in the three-dimensional cluster configuration, which would have a significant guiding effect on the subsequent solidification process. Through the microstructure analysis, it was observed that the addition of Co element had an inhibitory action on the liquid phase separation behavior due to the changes of interfacial tension, resulting in the formation of a fine second phase structure. Through the electrochemistry characteristics, it was found that the overpotentials of Fe−P@Cu metallic catalysts containing 8% Co and 16% Co with a current density of 10 mA/cm 2 have been improved to be 160 and 155 mV in 0.5 M H 2 SO 4 respectively. This excellent catalytic performance might be mainly attributed to the rapid transport of ions and the remarkable amount increase of electron transfer, resulting in the obvious promotion of the hydrogen evolution reaction of (Fe x Co 1−x ) n P@Cu alloys.

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Effect of Sn addition on morphology evolution of secondary phase in hypomonotectic Cu-Pb-Sn alloy during solidification

Cited by 25 publications

References 32 publications

Microstructure and Mechanical Properties of Additively Manufactured Ni-Al Bronze Parts Using Cold Metal Transfer Process

Microstructure and Mechanical Properties of Additively Manufactured Ni-Al Bronze Parts Using Cold Metal Transfer Process

Effect of Al Bronze Interlayer on Liquid–Solid Compound Interface of Sn Bronze/Steel

Effects of Co Addition on Microstructure Evolution and Efficient Hydrogen Evolution of Self-Supported Fe–P@Cu Immiscible Alloy

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