Influence of processing on the microstructure of nickel aluminum bronze (NAB)

A review of the corrosion behavior of conventional and additively manufactured nickel–aluminum bronze (NAB) alloys: current status and future challenges

“…24 The slow cooling rate of casting techniques, typically less than 0.1 °C s −1 , favors the diffusion-controlled transformation of the entire high-temperature stable β-phase into the eutectoid microstructure of α + κ III . 25 Thereafter, the resultant alloy can undergo traditional wrought processes, such as forging, extruding, rolling, and drawing, 24 which may lead to banding and distortion of κ phases. 25 The chemical compositions of common traditional cast and wrought NAB alloys are listed in Table 1.…”

“…25 Thereafter, the resultant alloy can undergo traditional wrought processes, such as forging, extruding, rolling, and drawing, 24 which may lead to banding and distortion of κ phases. 25 The chemical compositions of common traditional cast and wrought NAB alloys are listed in Table 1. Additionally, the microstructure of such products can be modified by applying various heat treatment processes.…”

“…2(a)). 49 It is also worth noting that when Table 1 Chemical composition (wt%) of common cast and wrought NAB alloys, including major alloying elements 25 high thermal and electrically conductive materials, such as copper and its alloys, are additively manufactured using near-infrared laser beam approaches, heat dissipation and laser light reflection can cause several problems in fabricating 3D parts. 50 Therefore, using other wavelength ranges of laser beams may be beneficial in laser-induced AM technologies for these metallic materials.…”

“…3), as all the existing b phase does not experience phase transformation. 58 While the microstructural transformations of NABs have been reviewed in other works, 25 and are not the central focus of this paper which deals with the corrosion characteristics of NAB alloys, the following discussions provide a brief but informative overview of the possible phase transformations and morphological properties of microstructural constituents in NAB alloys, in order to provide readers with a solid understanding of the fundamental aspects related to corrosion studies. Schematic representations of different phases of NAB alloy are demonstrated in Fig.…”

Effect of Pulsed Magnetic Field on the Microstructure of QAl9-4 Aluminium Bronze and Its Mechanism

“…The development of high-performance aluminium bronze materials to meet the requirements of more complex working conditions has become a research hotspot. In recent years, researchers have successfully improved the related properties of aluminium bronze alloys utilizing plastic machining [ 3 ], heat treatment [ 4 ], ultrasonic vibration [ 5 ], additive manufacturing [ 6 ], and other techniques. However, among these technologies, pulsed magnetic field processing has been favoured by researchers because of its “non-contact processing,” ability, and it can improve the metal’s structure and properties without affecting the shape and appearance of the metal.…”