Thermal Conductivity of As-Cast and Annealed Mg-RE Binary Alloys

Guo, Hongwei; Liu, Shuhong; Huang, Lei; Wang, Deqing; Du, Yong; Chu, May

doi:10.3390/met11040554

Cited by 12 publications

(9 citation statements)

References 36 publications

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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%

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

confidence: 99%

“…The use of magnesium cast alloys in aerospace applications started as early as the 1930s and peaked two decades later. Several prototype aircrafts were developed containing magnesium, including the XP-56 Black Bullet by Northrop Corporation, with [107,108,113,114].…”

Section: Aerospace Applicationsmentioning

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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“…GB wetting by the second solid phase can have a strong influence on the properties of materials, including Al alloys [18,20,22,23,[25][26][27][28][29][30][31][32][33][34][35], Fe-based alloys and steels [36,, Co-and Ni-based alloys [78][79][80][81][82][83][84][85], Cu alloys [86,88,90], Ti-and Zr-based alloys [91,93,95,97,, Mg alloys [124,126,[128][129][130][131], as well multicomponent and high-entropy alloys [132,134,[136][137][138][139][140][141][142][143][144].…”

Section: Influence Of Gb Wetting By the Second Solid Phase On The Pro...mentioning

confidence: 99%

“…Almost 20 years have passed since the discovery of the phenomenon of GB wetting by other solid phases in 2004 [17]. The indications of GB wetting by other solid phases were found and studied in a large circle of systems such as Al alloys [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35], Fe-based alloys and steels , Co-and Ni-based alloys [77][78][79][80][81][82][83][84][85], Cu alloys [86][87][88][89][90], Ti-and Zr-based alloys , Mg alloys [124][125][126][127][128][129][130][131], as well multicomponent and high-entropy alloys [132][133][134][135][136]…”

Section: Introductionmentioning

confidence: 99%

Grain Boundary Wetting by the Second Solid Phase: 20 Years of History

Straumal

Lepkova

Korneva

et al. 2023

Metals

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Grain boundaries (GBs) can be wetted by a second phase. This phase can be not only liquid (or melted), but it can also be solid. GB wetting can be incomplete (partial) or complete. In the case of incomplete (partial) wetting, the liquid forms in the GB droplets, and the second solid phase forms a chain of (usually lenticular) precipitates. Droplets or precipitates have a non-zero contact angle with the GB. In the case of complete GB wetting, the second phase (liquid or solid) forms in the GB continuous layers between matrix grains. These GB layers completely separate the matrix crystallites from each other. GB wetting by a second solid phase has some important differences from GB wetting by the melt phase. In the latter case, the contact angle always decreases with increasing temperature. If the wetting phase is solid, the contact angle can also increase with increasing temperature. Moreover, the transition from partial to complete wetting can be followed by the opposite transition from complete to partial GB wetting. The GB triple junctions are completely wetted in the broader temperature interval than GBs. Since Phase 2 is also solid, it contains GBs as well. This means that not only can Phase 2 wet the GBs in Phase 1, but the opposite can also occur when Phase 1 can wet the GBs in Phase 2. GB wetting by the second solid phase was observed in the Al-, Mg-, Co-, Ni-, Fe-, Cu-, Zr-, and Ti-based alloys as well as in multicomponent alloys, including high-entropy ones. It can seriously influence various properties of materials.

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“…Recently, many studies have focused on the modification of the alloy elements, with a special emphasis on additions to improve the mechanical properties of Mg alloys. Alloys such as Mg–Al [ 11 ], Mg–Zn [ 12 ], Mg–Zr [ 13 ] and Mg–RE (rare earth) [ 14 ] system alloys have been developed towards the high creep resistance. Among them, Mg–RE alloys were attractive due to their remarkable age-hardening response, excellent creep resistance and good formability [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Simulation Investigation of Nd Additions on As-Cast Microstructure and Precipitate Development in Mg–Nd System Alloys

Yan

Yang

et al. 2022

Materials

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The microstructure and precipitate evolution of as-cast Mg–Nd alloys with different contents of Nd was investigated via experimental and simulation methods. The research showed that the as-cast microstructure of Mg–Nd alloy consisted of α-Mg dendrites and the intermetallic phases. A metastable β phase precipitated, followed by α-Mg dendrites that could be confirmed as Mg12Nd by X-ray diffraction (XRD) analysis. The amount of β-Mg12Nd presented a rising trend with increasing Nd additions. In addition, the tertiary phase was also observed in as-cast Mg–Nd alloy when Nd content was greater than 3 wt.%, which precipitated from the oversaturated α-Mg matrix. The tertiary phase should be β1-Mg3Nd, which is also a metastable phase with a face-centered cubic lattice. However, it is a pity that the tertiary phase was not detected by the XRD technique. Moreover, an effective cellular automaton (CA) model was explored and applied to simulate the time-dependent α-Mg/β1-Mg3Nd eutectic growth. The simulated results of α-Mg/β1-Mg3Nd eutectic growth in Mg-3Nd presented that the growth of α-Mg dendrites was accompanied by the nucleation and growth of β1-Mg3Nd precipitates and eventually formed a eutectic structure. The eutectic morphologies for Mg–Nd system alloys with different Nd contents were also simulated using the proposed model, and the results revealed that α-Mg dendrite was a refinement, and the amount of α-Mg/β1-Mg3Nd eutectic was promoted, with increasing Nd content.

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Thermal Conductivity of As-Cast and Annealed Mg-RE Binary Alloys

Cited by 12 publications

References 36 publications

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

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

Grain Boundary Wetting by the Second Solid Phase: 20 Years of History

Experimental and Simulation Investigation of Nd Additions on As-Cast Microstructure and Precipitate Development in Mg–Nd System Alloys

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