Enhanced strength and corrosion resistance of Mg-Gd-Y-Zr alloy with ultrafine grains

Wan, Yingchun; Xu, Shiyuan; Liu, Chuming; Gao, Yonghao; Jiang, Shunong; Chen, Zhiyong

doi:10.1016/j.matlet.2017.11.096

Cited by 47 publications

(9 citation statements)

References 20 publications

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“…However, it was evident that WE43-T5, which has a smaller grain size, has better corrosion resistance than as-cast WE43. This may be contributed by the atomic flow being enhanced with the increase in grain boundaries counteracting the stress and making it better for the oxide layer to adhere to a substrate in turn, thus improving the corrosion resistance [11,36].…”

Section: Discussionmentioning

confidence: 99%

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Effect of Microstructure on Corrosion Behavior of WE43 Magnesium Alloy in As Cast and Heat-Treated Conditions

Yang

Gupta

Ding

et al. 2020

Metals

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The improvement in corrosion resistance of WE43 was well realized by heat treatment. To study the influence of microstructure on the corrosion behavior of WE43 in as-cast and heat-treated conditions, an immersion test was employed with as-cast and heat-treated samples in the 3.5% NaCl solution. The corrosion rate and change of morphology were recorded and the corrosion behavior was further investigated by scanning electron microscopy (SEM). The results indicated that the corrosion rate of the WE43 alloy decreased after heat treatment. It was observed that the eutectic gradually damages the protective film on the surface of the as-cast WE43 in the process of corrosion, which further increases the corrosion rate. The Zr-rich phase formed a domed structure resulting in the adjacent area being further corroded. The Y-rich phase has little effect on the corrosion reaction.

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Section: Discussionmentioning

confidence: 99%

“…Although Mg will form film during the process of oxidation, the improvement of corrosion resistance is extremely limited, resulting from the film being thin and not compact. The corrosion rate of Mg alloy products will be reduced by coating [6][7][8][9], alloying [10][11][12][13][14] and heat treatment [15,16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Microstructure on Corrosion Behavior of WE43 Magnesium Alloy in As Cast and Heat-Treated Conditions

Yang

Gupta

Ding

et al. 2020

Metals

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“…Among the various recently developed Mg alloys, Mg-Gd-Y alloys exhibit comparatively good corrosion resistance and high strength, making them available in diverse applications [ 10 , 11 , 12 ]. However, in order to obtain a desired strength, Mg-Gd-Y-based alloys were usually subjected to ageing treatment to generate precipitates, which is proved have detrimental influences on both the ductility and the corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Mechanical and Corrosion Performance by Forming Micro Shear Bands in Cold Forged Mg-Gd-Y-Zr Alloy

et al. 2020

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Forging at room temperature was applied on the per-extruded Mg-Gd-Y-Zr alloy to investigate the effect of cold forging on the microstructure, mechanical properties and corrosion resistance of the alloy. Abundant micro shear bands with misorientations of 2–15° were generated in the as forged alloys. Tremendous enhancement in tensile yield strength was achieved after forging. With a quantitative investigation, micro band boundaries were considered to provide a great contribution to the reinforcement. The ultrafine structure resulting from the formation of micro shear bands led to increased corrosion resistance of the alloy.

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“…Mg-Gd-Y-Zr alloys have attracted increasing attention in the aerospace field because of their excellent mechanical properties in both room and elevated temperatures and excellent castability [1,2] . The quality of Mg-Gd-Y-Zr alloy castings is closely related to melting condition, solidification process and humidity in the surrounding environment [3,4] .…”

Section: Introductionmentioning

confidence: 99%

(Y, Gd)H2 phase formation in as-cast Mg-6Gd-3Y-0.5Zr alloy

Wang

Wang³

et al. 2021

China Foundry

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In this work, a new (Y, Gd)H 2 precipitate was identified and systematically investigated in the ascast Mg-6Gd-3Y-0.5Zr alloy by XRD, SEM with EDS, TEM with EDS techniques and thermodynamics analysis. Results show that the as-cast alloy contains α-Mg, Mg 24 (Gd, Y) 5 , and (Y, Gd)H 2 phase. The (Y, Gd)H 2 phase usually forms near the eutectic phase Mg 24 (Gd, Y) 5 or in the α-Mg grains, displaying a rectangle-shape. The Mg 24 (Gd, Y) 5 and (Y, Gd)H 2 phases crystalize in bcc and fcc structure, respectively, and the (Y, Gd)H 2 phase has a semi-coherent relationship with α-Mg matrix. The thermodynamics calculation results reveal that the hydrogen dissolved in the melt leads to the formation of hydrides. It is also found that the (Y, Gd)H 2 hydride can form directly from the liquid phase during solidification. Additionally, it can precipitate by the decomposition of Mg 24 (Gd, Y) 5 phase due to absorbing hydrogen from the remaining melt.

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Enhanced strength and corrosion resistance of Mg-Gd-Y-Zr alloy with ultrafine grains

Cited by 47 publications

References 20 publications

Effect of Microstructure on Corrosion Behavior of WE43 Magnesium Alloy in As Cast and Heat-Treated Conditions

Effect of Microstructure on Corrosion Behavior of WE43 Magnesium Alloy in As Cast and Heat-Treated Conditions

Enhanced Mechanical and Corrosion Performance by Forming Micro Shear Bands in Cold Forged Mg-Gd-Y-Zr Alloy

(Y, Gd)H2 phase formation in as-cast Mg-6Gd-3Y-0.5Zr alloy

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