The role of Mg2Si on the corrosion behavior of wrought Mg–Zn–Mn alloy

Ben-Hamu, G.; Eliezer, D.; Shin, Kuk-Hyun

doi:10.1016/j.intermet.2008.03.003

Cited by 67 publications

(27 citation statements)

References 14 publications

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“…However, in the as-cast Mg 2 B 2 O 5 w/AZ91D composite, no b-Mg 17 Al 12 phase was observed by TEM. On the contrary, globular rather than the more common undesirable morphology of coarse Chinese-script Mg 2 Si compound [26] was observed at whisker/matrix interface. Although there is almost no Si in the composite, the very small amount of Mg 2 Si precipitates at interface during cooling is still possible since the solubility of Si in Mg is extremely low [26].…”

Section: Resultsmentioning

confidence: 86%

Microstructure and interface characterization of a cast Mg2B2O5 whisker reinforced AZ91D magnesium alloy composite

Chen

Jin

Schumacher

et al. 2010

Composites Science and Technology

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Section: Resultsmentioning

confidence: 86%

Microstructure and interface characterization of a cast Mg2B2O5 whisker reinforced AZ91D magnesium alloy composite

Chen

Jin

Schumacher

et al. 2010

Composites Science and Technology

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“…The aluminum matrix which is electrochemically more noble than the Mg 2 Si phase plays the role of cathodes while the [20][21][22]. It indicates that the crystalline Mg 2 Si particle dissolves during solution immersion and the anodic electrochemical reaction occurs on the particle according to the following equations:…”

Section: Methodsmentioning

confidence: 99%

Ex situ TEM observation of localized attack on AA 6061

Sun

Jiang

Xiang

et al. 2010

Materials & Corrosion

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Ex situ transmission electron microscopy (TEM) was used in conjunction with energy dispersed spectrometry (EDS) to monitor evolution near the pre-selected inclusions during initial stages of localized dissolution on the aluminum alloy (AA) 6061 immersed in 0.1 M NaCl solution. On the alloy TEM foil, Mg 2 Si phase particles were observed to preferentially dissolve after 3 min immersion. Nevertheless, different dissolution behaviors were observed to form in the vicinities of the different structure Fe-rich precipitates; the trenches were observed near the anorthic phase particle, but no obvious priority dissolution was detected in the vicinity of hexagonal phase particles. The preferential sites of alloy dissolution were found to depend on both the component and the structure of the intermetallics. The shift of electrochemical potential was found to relate the dissolution of the heterogeneous phases.

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“…[6] Experimental results proved that fine grain strengthening, solution strengthening, and second-phase strengthening can be achieved by adding suitable alloying elements, such as Zn, which has been used as a general alloying element for magnesium alloy to enhance room-temperature strength. [7][8][9] A small amount of Zn can be dissolved in Mg as the solution strengthening element, whereas excess Zn will react with Mg to form (Mg,Zn)-containing phases. [7][8][9] Timonova et al [10] stated that the addition of Mn and Zn together to Mg-8 pct A1 increased susceptibility.…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9] A small amount of Zn can be dissolved in Mg as the solution strengthening element, whereas excess Zn will react with Mg to form (Mg,Zn)-containing phases. [7][8][9] Timonova et al [10] stated that the addition of Mn and Zn together to Mg-8 pct A1 increased susceptibility. To date, many researchers have developed Mg-Zn-Mn alloys of different cast compositions (e.g., ZM21, ZM61, and ZM611) with high-temperature workability and formability.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Preparation of Mg-Li-Zn-Mn Alloys by Codeposition

Cao

Zhang

Han

et al. 2011

Metall Mater Trans B

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The electrochemical codeposition of Mg-Li-Zn-Mn alloys on a molybdenum electrode in LiClKCl-MgCl 2 -ZnCl 2 -MnCl 2 melts at 943 K (670°C) was investigated. Preparation of the alloys by electrolysis was proven feasible in LiCl-KCl-MgCl 2 -ZnCl 2 -MnCl 2 melts from cyclic voltammograms and chronopotentiometry measurements. X-ray diffraction (XRD) indicated that Mg-Li-Zn-Mn alloys with different phases were prepared via galvanostatic electrolysis. The microstructure of typical a + Mg 7 Zn 3 phase of Mg-Li-Zn-Mn alloys was characterized by an optical microscope and scanning electronic microscopy). The analysis by energy dispersive spectrometry showed that the addition of ZnCl 2 leads to the formation of intermetallic Mg 7 Zn 3 distributed in grain boundaries, whereas Mn mainly existed on polygon particles. The results of inductively coupled plasma analysis showed that the chemical compositions of alloys were consistent with the phase structures of XRD patterns.

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The role of Mg2Si on the corrosion behavior of wrought Mg–Zn–Mn alloy

Cited by 67 publications

References 14 publications

Microstructure and interface characterization of a cast Mg2B2O5 whisker reinforced AZ91D magnesium alloy composite

Microstructure and interface characterization of a cast Mg2B2O5 whisker reinforced AZ91D magnesium alloy composite

Ex situ TEM observation of localized attack on AA 6061

Electrochemical Preparation of Mg-Li-Zn-Mn Alloys by Codeposition

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