Improved strength and enhanced pitting corrosion resistance of Al-Mn alloy with Zr addition

Cao, Cheng; Chen, Dengbin; Ren, Jieke; Shen, Jianguo; Meng, Liang; Liu, Jiabin

doi:10.1016/j.matlet.2019.126535

Cited by 22 publications

(6 citation statements)

References 15 publications

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“…[33] In addition, carbides are difficult to precipitate at LAGBs, and the increase of LAGBs generated during the solidification process will significantly improve the corrosion resistance of the material. [29,34] The KAM results of SLMed GAS are shown in Figure 8. KAM is used to indicate the average orientation difference between a specified point and other adjacent points in the grains, which is usually less than 5 .…”

Section: Microstructure Evolutionmentioning

confidence: 99%

Novel Gradient Alloy Steel with Quasi‐Continuous Ratios Fabricated by Selective Laser Melting: Microstructure and Corrosion Behavior

Zhang

Zhou

et al. 2021

steel research int.

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In this article, a quasi‐continuous ratio gradient alloy steel (GAS) with a 24CrNiMo high‐strength low‐alloy steel matrix for high‐speed railway brake discs is fabricated by selective laser melting (SLM). The composition of GAS is X% 24CrNiMo + (1–X)% wear‐resistant stainless steel (WSS), in which X is 100, 65, 35, and 0. The relationship between the microstructure and the corrosion resistance is intensively studied by electron backscatter diffraction (EBSD) and potentiodynamic electrochemical equipment. With the increase in the content of WSS, the low angle grain boundaries of the GAS increases, and the microstructure refines and the texture intensity decreases. The passivation film of the external WSS strengthening layer is dense; the corresponding corrosion potential and corrosion current density are −0.109 V and 2.08 × 10−8 A cm−2, respectively. The corrosion current density is about 1% of the substrate 24CrNiMo, and the corrosion resistance of the material is significantly improved.

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Section: Microstructure Evolutionmentioning

confidence: 99%

Novel Gradient Alloy Steel with Quasi‐Continuous Ratios Fabricated by Selective Laser Melting: Microstructure and Corrosion Behavior

Zhang

Zhou

et al. 2021

steel research int.

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show abstract

“…Compared with the LAGBs, high-angle grain boundaries (HAGBs) are supposed to possess higher reactivity and are more susceptible to anodic dissolution. As a result, during the development of pitting corrosion, HAGBs serve as effective anodes and are preferentially attacked (Cao et al, 2019). Thus, corrosion resistance is enhanced in view of the higher fraction of LAGBs in the α-Mg matrix.…”

Section: Corrosion Behaviormentioning

confidence: 99%

Microstructural Characteristics, Mechanical and Corrosion Properties of an Extruded Low-Alloyed Mg-Bi-Al-Zn Alloy

Cheng

Liu

et al. 2020

Front. Mater.

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An extruded low-alloyed Mg-Bi-Al-Zn alloy combining excellent tensile properties (YS = 201 MPa, EL = 29. 4%) with high corrosion resistance (P i = 0.14 mm/a) for biomedical application is successfully developed in this study. The extruded alloy is mainly composed of dynamic recrystallized (DRXed) grains (2.32 ± 0.12 µm) and strongly textured coarse non-DRXed grains, as well as certain nano-scaled Mg 3 Bi 2 precipitates (135.68 ± 27.86 nm). Note that most basal planes for non-DRXed grains are preferentially distributed parallel to the extrusion direction. The study explored the dependences of the properties and relevant mechanisms of the studied alloy on its microstructural characteristics in terms of grain size, grain orientation, and precipitates.

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“…The corrosion resistance of aluminum alloys is affected by a number of factors, and finetuning the composition of the alloy may be considered to improve corrosion resistance [11]. For example, the addition of Cu or Zr may help improve the corrosion resistance of aluminum alloys [12,13]. The introduction of corrosion inhibitors, such as organic corrosion inhibitors, forms a protective film that slows the corrosion process [14].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Corrosion Resistance of 3003 Aluminum Alloy in Acidic Salt Spray under Different Processing States

Lu,

Zhao,

Wang

et al. 2024

Metals

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3003 aluminum alloy exhibits commendable corrosion resistance, ease of processing, and good formability, rendering it extensively utilized across many industrial sectors. In this study, the corrosion behavior of 3003 aluminum alloy in a homogenized state and after hot extrusion deformation in an acidic salt spray environment for different times was studied. The microstructure of the 3003 aluminum alloy in the homogenized state and after hot extrusion was characterized using scanning electron microscopy (SEM), optical microscope (OM), laser scanning confocal microscope (LSCM) etc., while electrochemical methods were employed to study the difference in corrosion resistance between these two states. The results show that corrosion pits on the surface of the homogenized 3003 aluminum alloy increase with time, and corrosion extends along the second phase arrangement, while the hot extruded 3003 aluminum alloy mainly exhibits corrosion pit extension. The grain size of the homogenized 3003 aluminum alloy is larger than that of the hot extruded state, and the second phase is distributed in a reticular pattern. Hot extrusion deformation ensures not only a uniform distribution of the second phase in the 3003 aluminum alloy but also a reduced grain size, an increased grain boundary density, a heightened electrochemical activity in acidic environments, and an augmented pitting density. Compared with the homogenized 3003 aluminum alloy, the pitting density, maximum pitting depth, and weight loss of the hot extruded state are increased.

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Improved strength and enhanced pitting corrosion resistance of Al-Mn alloy with Zr addition

Cited by 22 publications

References 15 publications

Novel Gradient Alloy Steel with Quasi‐Continuous Ratios Fabricated by Selective Laser Melting: Microstructure and Corrosion Behavior

Novel Gradient Alloy Steel with Quasi‐Continuous Ratios Fabricated by Selective Laser Melting: Microstructure and Corrosion Behavior

Microstructural Characteristics, Mechanical and Corrosion Properties of an Extruded Low-Alloyed Mg-Bi-Al-Zn Alloy

Investigation on the Corrosion Resistance of 3003 Aluminum Alloy in Acidic Salt Spray under Different Processing States

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