Tailoring microstructure of a nickel aluminium bronze by hot extrusion and its impact on mechanical and corrosion behaviour

Wang, Wanyu; Zhang, Wenjing; Liu, Yunfeng; Zou, Jin; Mi, Xujun; Li, Dandan; Li, Kaiyang; Huang, Guojie

doi:10.1016/j.corsci.2023.111049

Cited by 18 publications

(2 citation statements)

References 39 publications

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“…It was deduced that the volume fraction of the β'-phase was originally 15.299% for 30 Hz, increased to 26.98% for 50 Hz, and peaked at 40.08% for 70 Hz. The crucial corrosion resistance property of NAB is also affected by the existence of more β´-phase [39]. The presence of κ 2 and κ 3 phases is found to reduce as the material cools faster.…”

Section: Microstructure Investigationmentioning

confidence: 95%

Role of oscillation frequency and amplitude on the microstructure and properties of linear friction welded nickel aluminium bronze joints

A K,

Selvam

et al. 2024

Phys. Scr.

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This study explores the influence of oscillation frequency and amplitude on the quality of linear friction welded joints using as-cast nickel aluminium bronze. Welding was conducted at 30 Hz, 50 Hz, and 70 Hz oscillated frequencies and amplitudes of 1.5 mm, 2 mm, and 3 mm. The joint’s performance was thoroughly investigated through systematic analysis, including macrostructure examination, peak interfacial temperature measurement, microstructure evaluation, strain assessment, cooling rate determination, microhardness testing, and tensile property characterization. The width of the weld zone varied from 183 µm to 297 µm, and the thermomechanical affected zone (TMAZ) area ranged from 4.48 mm² to 14.79 mm² across different process parameters. In the parent material, the volume fraction of the β-phase was as low as 20.2%, contrasting with the dominant α-phase at 79.8%. The average grain size of the lamellar and globular α-phase mixture was 26.4 µm. Notably, the weld zone exhibited extremely refined α-phase grains, with diameters less than 5 µm in all cases. The volume fraction of the β'-phase increased significantly with higher frequencies, from 15.299 % at 30 Hz to 26.98% at 50 Hz, peaking at 40.08% at 70 Hz, leading to varying k phases. This variation in microstructure had a substantial impact on mechanical properties. Tensile strength ranged from 503 MPa to 582 MPa, while ductility varied from 13.5% to 21.7%. Additionally, the hardness of the parent material increased from approximately 155 Hv to 260 Hv. This study demonstrates that controlling the oscillation frequency and amplitude in linear friction welding processes can yield consistent, high-quality welds in nickel aluminium bronze.

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Section: Microstructure Investigationmentioning

confidence: 95%

Role of oscillation frequency and amplitude on the microstructure and properties of linear friction welded nickel aluminium bronze joints

A K,

Selvam

et al. 2024

Phys. Scr.

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“…In Figure 7b, after 30 d of static immersion, the anodic polarization curves of ZCuAl8-6-4-2, ZCuAl9-5-4-2, and ZCuAl10-4-4-2 showed obvious passivation in the dynamic polarization curves, with an increase in voltage up to about 0.2 V, indicating that the dense oxide film was generated on the surface [23]. After that, the potential continued to The Nyquist plots are mainly composed of high-frequency capacitive arcs representing the charge-transfer resistance and the surface-film properties [25,26].…”

Section: Electrochemical Testingmentioning

confidence: 99%

Effect of Al/Ni Ratio on the Microstructure and Properties of Nickel–Aluminum Bronze Alloys

Tan,

Xie,

Feng

et al. 2024

Materials

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To study the effect of aluminum and nickel elements on the microstructures and properties of the nickel–aluminum bronze (NAB) alloy, four kinds of alloys with different compositions, ZCuAl7–7–4–2, ZCuAl8-6-4-2, ZCuAl9-5-4-2, and ZCuAl10-4-4-2, are prepared by vacuum-melting technology. The effects of different Al/Ni ratios on the microstructures of NAB are investigated using a metalloscope, scanning electron microscopy, transmission electron microscopy, and XPS analysis. The mechanical property is evaluated with microhardness testing and tensile mechanical testing. The corrosion resistance is evaluated using mass-loss testing, electrochemical testing, and corrosion-product characterization. The results show that with the increase of the Al/Ni ratio, the content of precipitated phases increases, while β′ and hard κ, which have a different morphology, appear. As the Al/Ni ratio rises from 1 to 2.5, the hardness increases from 104 HV to 202 HV, and the tensile strength increases by 394 MPa from 356 MPa to 751 MPa, but the elongation decreases substantially from 50.50% to 11.00%. The best corrosion resistance is shown on ZCuAl7-7-4-2, with a corrosion rate of 0.00267 mm/a after 30 d of static immersion corrosion in 3.5 wt.% NaCl solution. Through electrochemical testing and corrosion-product characterization, it is found that ZCuAl7-7-4-2 has the largest polarization resistance Rp, and the selective corrosion of the surface is mild.

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Synergistic improvement of erosion-corrosion resistance and mechanical properties of nickel aluminium bronze alloy by the addition of Cr

Wang,

Zhang,

Huang

et al. 2024

Rare Met.

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Tailoring microstructure of a nickel aluminium bronze by hot extrusion and its impact on mechanical and corrosion behaviour

Cited by 18 publications

References 39 publications

Role of oscillation frequency and amplitude on the microstructure and properties of linear friction welded nickel aluminium bronze joints

Role of oscillation frequency and amplitude on the microstructure and properties of linear friction welded nickel aluminium bronze joints

Effect of Al/Ni Ratio on the Microstructure and Properties of Nickel–Aluminum Bronze Alloys

Synergistic improvement of erosion-corrosion resistance and mechanical properties of nickel aluminium bronze alloy by the addition of Cr

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