A Comparative Study on Microstructure, Mechanical and Tribological Properties of A4, AE41, AS41 and AJ41 Magnesium Alloys

Zengin, Hüseyin; Türen, Yunus; Elen, Levent

doi:10.1007/s11665-019-04223-8

Cited by 21 publications

(7 citation statements)

References 34 publications

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“…In addition, Zn has the ability to boost the corrosion performance of magnesium by assisting in the development of a protective layer of oxide film [11]. Moreover, the ability of rare earth elements to improve the strength of magnesium at high temperatures and to resist creep is widely acknowledged [12][13][14]. Several studies concentrated on the role of gadolinium (Gd) in the characteristics of magnesium alloys [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Evolution of Microstructure, Mechanical Properties, and Corrosion Resistance of Mg–2.2Gd–2.2Zn–0.2Ca (wt%) Alloy by Extrusion at Various Temperatures

Zengin

Ari²,

Turan

et al. 2023

Materials

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The current investigation involved casting the Mg–2.2Gd–2.2Zn–0.2Ca (wt%) alloy (GZX220) through permanent mold casting, followed by homogenization at 400 °C for 24 h and extrusion at 250 °C, 300 °C, 350 °C, and 400 °C. Microstructure investigations revealed that α-Mg, Mg–Gd, and Mg–Gd–Zn intermetallic phases were present in the as-cast alloy. Following the homogenization treatment, a majority of these intermetallic particles underwent partial dissolution into the matrix phase. α-Mg grains exhibited a considerable refinement by extrusion due to dynamic recrystallization (DRX). At low extrusion temperatures, higher basal texture intensities were observed. The mechanical properties were remarkably enhanced after the extrusion process. However, a consistent decline in strength was observed with the rise in extrusion temperature. The corrosion performance of the as-cast GZX220 alloy was reduced by homogenization because of the lack of corrosion barrier effect of secondary phases. A significant enhancement of corrosion resistance was achieved by the extrusion process.

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Section: Introductionmentioning

confidence: 99%

Evolution of Microstructure, Mechanical Properties, and Corrosion Resistance of Mg–2.2Gd–2.2Zn–0.2Ca (wt%) Alloy by Extrusion at Various Temperatures

Zengin

Ari²,

Turan

et al. 2023

Materials

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“…this reveals the importance of mg alloys as an engineering material. zm21 is a member of the mgzn alloy system with a low alloy element [1][2][3][4][5]. the usage of unalloyed magnesium as a structural material is not very prevalent due to its low mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

2022

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A compArAtive Study on the mechAnicAl And corroSion propertieS of the Zm20And Zm21 AlloyS After cASting And rolling in this study, the effects of grain refinement and production methods on the corrosion, corrosive wear and mechanical properties of the as-cast and as-rolled mg-2 wt.% zn (zm20) and mg-2 wt.% zn-0,51 wt.% mn (zm21) alloys were examined by using Om, XrD, sem, hardness and uniaxial tensile test. additionally, the potentiodynamic polarization, immersion corrosion test and corrosive wear properties of the zm20 and zm21 alloys were compared. according to the XrD results, mgzn and mgzn 2 phases were found in the alloys and also mnzn 3 phase occurred in the zm21 alloy with the addition of manganese. Both during solidification forming nucleation points with the added manganese and during rolling the broken secondary phase particles distributed into the matrix prevented grain growth and led to the formation of a more refined structure. the tensile test results showed that the strength of the as-cast zm21 alloys were better than that of the as-cast zm20 alloys and further improvement in mechanical properties occurred with the rolling of the both alloys. the most superior hardness was found in the as-rolled zm21 alloy. in the total 400-m reciprocal corrosive wear test in the 3.5% naCl solution, the lowest mass loss was in the as-rolled zm21 alloys. in the potentiodynamic corrosion test, the highest corrosion resistance was occurred by the as-cast zm20 alloy.

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“…Alloying elements (Gd, Al, Sn) are known to improve the ductility and grain structure in Mg alloys [28,31]. Refined grain structure with alloying elements (Sn, Al, and Si) ensures higher wear resistance in Mg components [38][39][40]. Al, Zn, Sn, and Ca are the family of light metal groups used as the major alloying elements for Mg alloys [35,41,42].…”

Section: Introductionmentioning

confidence: 99%

Image Processing of Mg-Al-Sn Alloy Microstructures for Determining Phase Ratios and Grain Size and Correction with Manual Measurement

et al. 2021

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The study of microstructures for the accurate control of material properties is of industrial relevance. Identification and characterization of microstructural properties by manual measurement are often slow, labour intensive, and have a lack of repeatability. In the present work, the intermetallic phase ratio and grain size in the microstructure of known Mg-Sn-Al alloys were measured by computer vision (CV) technology. New Mg (Magnesium) alloys with different alloying element contents were selected as the work materials. Mg alloys (Mg-Al-Sn) were produced using the hot-pressing powder metallurgy technique. The alloys were sintered at 620 °C under 50 MPa pressure in an argon gas atmosphere. Scanning electron microscopy (SEM) images were taken for all the fabricated alloys (three alloys: Mg-7Al-5Sn, Mg-8Al-5Sn, Mg-9Al-5Sn). From the SEM images, the grain size was counted manually and automatically with the application of CV technology. The obtained results were evaluated by correcting automated grain counting procedures with manual measurements. The accuracy of the automated counting technique for determining the grain count exceeded 92% compared to the manual counting procedure. In addition, ASTM (American Society for Testing and Materials) grain sizes were accurately calculated (approximately 99% accuracy) according to the determined grain counts in the SEM images. Hence, a successful approach was proposed by calculating the ASTM grain sizes of each alloy with respect to manual and automated counting methods. The intermetallic phases (Mg17Al12 and Mg2Sn) were also detected by theoretical calculations and automated measurements. The accuracy of automated measurements for Mg17Al12 and Mg2Sn intermetallic phases were over 95% and 97%, respectively. The proposed automatic image processing technique can be used as a tool to track and analyse the grain and intermetallic phases of the microstructure of other alloys such as AZ31 and AZ91 magnesium alloys, aluminium, titanium, and Co alloys.

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A Comparative Study on Microstructure, Mechanical and Tribological Properties of A4, AE41, AS41 and AJ41 Magnesium Alloys

Cited by 21 publications

References 34 publications

Evolution of Microstructure, Mechanical Properties, and Corrosion Resistance of Mg–2.2Gd–2.2Zn–0.2Ca (wt%) Alloy by Extrusion at Various Temperatures

Evolution of Microstructure, Mechanical Properties, and Corrosion Resistance of Mg–2.2Gd–2.2Zn–0.2Ca (wt%) Alloy by Extrusion at Various Temperatures

Archives of Metallurgy and Materials

Image Processing of Mg-Al-Sn Alloy Microstructures for Determining Phase Ratios and Grain Size and Correction with Manual Measurement

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