Microstructure evolution and improvement of thermal conductivity in Mg–2Sn alloy induced by La addition

Zhou, Xiong; Mo, Liling; Du, Jun; Luo, Gan

doi:10.1016/j.jmrt.2022.01.083

Cited by 15 publications

(4 citation statements)

References 37 publications

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“…It means that those short rod-or feathery-and fibrous-shaped phases belong to the (Ca,MM)MgSn phase. Due to the lower addition of MM (less than 1 wt.%), no Mg 12 MM phase was found based on extra EDS results, and agree with the study of Du et al [24]. Thus, the phase constitution of the three alloys were α-Mg + Mg 2 Sn + (Ca,MM)MgSn.…”

Section: Microstructure Of the As-cast Alloyssupporting

confidence: 89%

“…However, there still remained some peaks that belong to an unknown phase according to the database of the Jade 6 software. As reported in the literature, Mg-Sn-Ca alloys may contain a CaMgSn phase when alloyed with dilute Ca [21,22], and Mg-Sn-RE alloys may exist with Mg 12 RE, Mg 17 RE 2 or RE 5 Sn 3 phases [23], and an REMgSn intermetallic compound [12,24] with the addition of RE elements, including La or Ce, etc. It was difficult to discern the detailed phases in this study, especially the alloys added with both Ca and RE elements.…”

Section: Microstructure Of the As-cast Alloysmentioning

confidence: 81%

“…Du et al [26] also provided similar results with Mg-Sn-Ca-La alloys. They found that the dissolution of Ca converts the LaMgSn phase to form the (La,Ca)MgSn phase based on cooling curve thermal analyses and SAED via TEM assisted with FIB [24,26]. According to the calculated pattern of the (La,Ca)MgSn phase [26] and phase diagrams of Mg-Sn-Ca-Ce alloys [25], the unknown phase was identified as a (Ca,MM)MgSn phase, as shown in Figure 2.…”

Section: Microstructure Of the As-cast Alloysmentioning

confidence: 99%

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Effect of Mischmetal Addition on Microstructure and Mechanical Properties of As-Cast and As-Rolled Mg–Sn–Ca Alloys

Luo,

Dong,

Zhong

et al. 2023

Crystals

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The microstructures and mechanical properties of Mg–3Sn–0.1Ca–xMM (mischmetal, x = 0.3, 0.6, and 0.9 wt.%) alloys were investigated. Optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction spectroscopy (XRD) were used to characterize the microstructures and phase constitutions of the cast and rolled alloys. Room temperature tensile tests were conducted to obtain the mechanical properties and macro-textures to evaluate the texture weakening effect results of the MM. The results show that an abundance of second phase formed, confirmed as the (Ca,MM)MgSn phase, and the volume fraction increased with the increasing MM addition. The tensile yield strength of the as-cast alloys increased with the MM addition, but the elongation decreased. All of the rolled Mg–3Sn–0.1Ca–xMM alloys showed a strong basal texture, and only slightly decreased in intensity after annealing treatment due to the particle-stimulated nucleation of recrystallization. The as-annealed Mg–3Sn–0.1Ca–0.6MM alloys exhibited the highest tensile strengths of 266.5 ± 3.3 MPa and 136.1 ± 3.7 MPa, which are mainly ascribed to grain refinement strengthening, Orowan strengthening and texture strengthening.

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Section: Microstructure Of the As-cast Alloyssupporting

confidence: 89%

Section: Microstructure Of the As-cast Alloysmentioning

confidence: 81%

Section: Microstructure Of the As-cast Alloysmentioning

confidence: 99%

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Effect of Mischmetal Addition on Microstructure and Mechanical Properties of As-Cast and As-Rolled Mg–Sn–Ca Alloys

Luo,

Dong,

Zhong

et al. 2023

Crystals

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“…Extensive studies and evaluations were conducted to improve the thermal conductivity of traditional Mg-Al alloys through alloying elements like Al [93][94][95][96], Zn [94,[97][98][99][100], Mn [94,97], Sn [97,101], Zr [97], Ca [97,102,103], Si [103,104], Li [101], Sr. [102] and RE elements like Sc [105], Y [106][107][108], Gd [106,107,109], Ce [108,[110][111][112][113][114], La [113,115,116], Nd [113,117] and Sm [108,113]. The influence of chemical composition, second phase, microstructure, texture and casting processes on the thermal conductivity of magnesium alloys has been discussed in these studies.…”

Section: Battery-related Application Of Magnesium Alloys: (A) Hpdc Az...mentioning

confidence: 99%

Applications of High-Pressure Die-Casting (HPDC) Magnesium Alloys in Industry

Fan¹,

Wang²,

Wang³

et al. 2023

Magnesium Alloys - Processing, Potential and Applications

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High-pressure die-cast (HPDC) magnesium alloys have seen diverse applications in the automotive industry, primarily driven by requirements in internal combustion engine (ICE) vehicles. As the automotive industry is transitioning to an electric vehicle (EV) architecture, there is a great potential for novel applications to improve driving range efficiency. In addition, there is a trend toward larger-sized automotive die castings and an increased interest in aerospace applications due to weight reduction. In this chapter, we reviewed the traditional automotive structural applications in ICE vehicles, as well as current and potential future EV and aerospace applications of HPDC magnesium alloys. The structural applications using AM50, AM60, AZ91 and AE44 magnesium alloys in traditional vehicles can be applied to modern EVs. Additionally, magnesium alloys with varying degrees of higher thermal conductivity, improved castability, superior high temperature properties and flammability need to be developed to replace battery and aerospace in-cabin-related structural materials to meet all safety requirements. Several newly developed magnesium alloys with superior castability are also reviewed for potential automotive and aerospace applications.

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