Sequential precipitation behavior of Mg17Al12 and Mg2Sn in Mg-8Al-2Sn-1Zn alloys

Jo, Su Mi; Kim, Sung Dae; Kim, Tae-Hoon; Go, Yohan; Yang, Cheol‐Woong; You, Bong Sun; Kim, Young Min

doi:10.1016/j.jallcom.2018.03.380

Cited by 27 publications

(6 citation statements)

References 39 publications

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“…Thus, more Mg17Al12 phases were formed with increasing Sn content. Some previous studies have accurately determined the habit plane between Mg2Sn and Mg17Al12 phase [26]. The existence of the habit plane (220)Mg2Sn //(330)Mg17Al12 made Mg2Sn become the heterogeneous nucleation point of Mg17Al12 [27].…”

Section: Resultsmentioning

confidence: 99%

Rheological Solidification Behavior and Mechanical Properties of AZ91-Sn Alloys

et al. 2019

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The solidification and tensile deformation behaviors of rheo-cast AZ91-Sn alloys were revealed to study the effects of Sn alloying on improvement of AZ91 alloy’s mechanical properties. Two kinds of Mg17Al12 phases precipitated from the supersaturated magnesium matrix during rheo-solidification were observed: coarse discontinuous precipitates (DP) at grain boundaries and small-sized continuous precipitates (CP) inside grains. With increasing Sn content, the amount of Mg17Al12 phases was increased whilst the amount of Al atoms in the matrix was decreased. Due to the higher melting point of Mg2Sn than Mg17Al12, Mg2Sn precipitated earlier from the melt, and therefore provided heterogeneous nuclei for Mg17Al12 during the eutectic reaction. Due to grain refinement and solid solution strengthening, AZ91-2.4Sn (mass%) gained 52% increase in tensile strength and 93% increase in elongation compared with pure AZ91 alloy. The higher-density twins and microcracks induced by Sn alloying relaxed stress concentration during plastic deformation, so the fracture mode was transformed from cleavage fracture of pure AZ91 alloy to ductile fracture of AZ91-Sn alloys.

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Section: Resultsmentioning

confidence: 99%

Rheological Solidification Behavior and Mechanical Properties of AZ91-Sn Alloys

et al. 2019

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“…In addition, Jung et al by the effect of Sn element added to AZ91 Mg alloy, formation of Mg 17 Al 12 phase increased and hardness value increased by 50% [57]. Su Mi Jo et al reported that the intermetallic phases of Mg 17 Al 12 and Mg 2 Sn increase in the structure of Mg-8Al-2Sn-1Zn alloy and that hardness and yield strength can give higher values [58]. Based on similar studies, the numerical ratio of Mg 17 Al 12 phase increased by 40% (19.19 to 26.26) and so hardness value increased by 45% (86 to 125) because of AA in this study.…”

Section: Resultsmentioning

confidence: 99%

A basic study on artificial aging in Mg-10Al₁₂Si+1Pb alloy

Çiçek

Aydoğmuş

Sun

2020

Mater. Res. Express

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In this study, research has been made on the aging of metal matrix composite materials produced by the in situ casting system. Mg matrix composite material was produced by the in situ casting system. In this study, 90%Mg+10% Al 12 Si (wt) ingot casting was performed for alloy formation and 1% Pb was added as an alloying element to the melted structure. This study aims to examine the effect of the artificial aging (AA) process on hardness and microstructure after alloying and composite of Mg metal. The in situ casting system was used in the casting of Mg alloy under the Ar gas atmosphere. The material after required casting homogenization process; for the AA process, they were embedded in a powder graphite filled vessel and kept at 350°C for 1 h and then quenched (with 25°C water). Later; after quenching, the materials were kept at 150°C for 2, 4, 12, 16 and 24 h and aged samples were obtained. Microstructure images were obtained from the samples by scanning electron microscope (SEM) and light optical microscope (LOM) and then the hardness values of the micro hardness device were measured. Grain structure because of AA heat treatment; showed changes according to un-aging material. The hardness value is directly proportional to the increasing aging time of the materials applied to the AA process; it was found that the levels increased approximately to 45% (86HV to 125HV) compared to the un-aging material and passed to the fixing phase.

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“…Moreover, obvious diffraction peaks of the Mg 2 Sn phase could not be seen for the 300 • C-2P sample. It was proven that the precipitation of the Mg 2 Sn phase could nucleate at the edge-tip of the Mg 17 Al 12 phase [34]. If the precipitated amount of the Mg 17 Al 12 phase were small, then the precipitation of Mg 2 Sn would be small as well.…”

Section: Microstructure Evolution During Ecapmentioning

confidence: 99%

Influence of Texture on the Mechanical Properties of a Mg-6Al-1Zn-0.9Sn Alloy Processed by ECAP

Hong¹,

Guo²,

Zhang³

et al. 2021

Materials

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The microstructure and mechanical properties of a Mg-6Al-1Zn-0.9Sn alloy processed by equal channel angular pressing (ECAP) at temperatures of 250 °C and 300 °C were investigated. It was found that the refinement of the microstructure was very dependent on the processing temperature. The main reason for the difference in grain refinement was the precipitation of secondary-phase particles. Texture information obtained by electron back-scatter diffraction (EBSD) showed the gradual formation of a 45° texture during the ECAP process, while the maximum intensity was different for processing temperatures at 250 °C and 300 °C. By calculating the contribution from different strengthening mechanisms, it was found that a 45° texture had a huge influence on grain boundary strengthening and thus the yield strength.

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Sequential precipitation behavior of Mg17Al12 and Mg2Sn in Mg-8Al-2Sn-1Zn alloys

Cited by 27 publications

References 39 publications

Rheological Solidification Behavior and Mechanical Properties of AZ91-Sn Alloys

Rheological Solidification Behavior and Mechanical Properties of AZ91-Sn Alloys

A basic study on artificial aging in Mg-10Al₁₂Si+1Pb alloy

Influence of Texture on the Mechanical Properties of a Mg-6Al-1Zn-0.9Sn Alloy Processed by ECAP

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Sequential precipitation behavior of Mg17Al12 and Mg2Sn in Mg-8Al-2Sn-1Zn alloys

Cited by 27 publications

References 39 publications

Rheological Solidification Behavior and Mechanical Properties of AZ91-Sn Alloys

Rheological Solidification Behavior and Mechanical Properties of AZ91-Sn Alloys

A basic study on artificial aging in Mg-10Al12Si+1Pb alloy

Influence of Texture on the Mechanical Properties of a Mg-6Al-1Zn-0.9Sn Alloy Processed by ECAP

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A basic study on artificial aging in Mg-10Al₁₂Si+1Pb alloy