Thermal characteristics of Mg–Zn–Mn alloys with high specific strength and high thermal conductivity

Yuan, Jiawei; Zhang, Kui; Zhang, Xu-hu; Li, Xinggang; Li, Ting; Li, Yongjun; Ma, Minglong; Shi, Guoliang

doi:10.1016/j.jallcom.2013.03.184

Cited by 87 publications

(23 citation statements)

References 15 publications

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“…The lattice defects including vacancies, dislocations and crystal boundaries, are also the scattering centers of phonons and electrons that stop the free movement of electrons and accordingly reduce the thermal conductivity of the alloys [4,9]. The finer grain size leads to worse thermal performance of the Mg alloys [22,31]. As shown above (Figures 2 and 3), the extrusion process significantly reduces the mean grain size of the Mg alloys, so the extruded Mg alloys contain much more crystal boundaries (the scattering centers of phonons and electrons) than the cast alloys, which results in remarkable decreases of the thermal conductivity of the extruded alloys.…”

Section: Effect Of Extrusion Process On the Thermal Conductivitymentioning

confidence: 99%

“…Since the different elements have the different effects on the mechanical properties [10][11][12][13][14][15] and thermal performance [2][3][4][16][17][18][19][20][21][22] of the Mg alloys, the alloying element type and concentration of the Mg alloys developed for the applications of heat dissipation should be carefully chosen in order to get a good balance between the thermal and mechanical properties. So far, most studies [2,3,9,16,17,19,20] have focused on the thermal conductivity of the Mg alloys without consideration from the angle of good combination of mechanical and thermal properties, which is undesirable for the applications of heat dissipation.…”

Section: Introductionmentioning

confidence: 99%

“…So far, most studies [2,3,9,16,17,19,20] have focused on the thermal conductivity of the Mg alloys without consideration from the angle of good combination of mechanical and thermal properties, which is undesirable for the applications of heat dissipation. It was reported that the cast Mg-Zn-Mn alloy exhibits the heat conductivity of 125 W/(m•K) [22] which is about twice as high as that of AZ91 and AM60, and the extruded Mg-Mn-Zn system alloys with a low content of Nd exhibit good strength [23]. Therefore, Mg-Mn-Zn-Nd alloys are expected to offer a good combination of thermal and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Effect of Nd Content and Extrusion Process on Thermal Conductivity of Mg-Mn-Zn-Nd Alloys

et al. 2018

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The thermal conductivity of the Mg-1Mn-2Zn-xNd alloys (x = 0.5, 1.0, 1.5 wt. %) was studied for the potential applications of heat dissipation. The phase constituents were examined by X-ray diffraction analysis, and the microstructure was observed by light and scanning electron microscopes. The thermal conductivity of the Mg alloys was gauged at room temperature using laser flash method. The experimental results indicate that the thermal conductivity of both the cast and extruded Mg alloys decreases slowly with Nd content, and the extrusion process remarkably reduces the grain sizes and thermal conductivity of the Mg alloys. The thermal conductivity of cast Mg-1Mn-2Zn-xNd alloys exceeds the required critical value (100 W/(m·k)) for the cast Mg alloys. Among them, the cast Mg-1Mn-2Zn-1Nd alloy has great potential to be a good candidate of heat dissipation materials due to its good combination of thermal and mechanical properties.

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Section: Effect Of Extrusion Process On the Thermal Conductivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Effect of Nd Content and Extrusion Process on Thermal Conductivity of Mg-Mn-Zn-Nd Alloys

et al. 2018

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“…reduced the thermal conductivity, while the addition of Zn to Mg matrix had smaller effects on the thermal conductivity [67][68][69] . The thermal conductivity of ZM51 alloy at room temperature was measured to be 125 W/m• K, almost twice higher than that of Mg-Al series and Mg-Re series [70] . In addition, grain refinement could be considered as a meaningful approach to obtain high thermal conductivity.…”

Section: Thermal Conductive Materialsmentioning

confidence: 87%

Research Progress in Magnesium Alloys as Functional Materials

Chen

Geng

Pan

2016

Rare Metal Materials and Engineering

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Magnesium alloys have a significant advantage, low density over other structure metals currently and have been widely used in various fields such as transportation and aerospace. With the development of research and the enlargement of research scope, more advantages have been developed: high storage capacity, high theoretical volumetric energy density, extraordinarily high damping capacity, good biocompatibility, excellent shielding efficiency as well as impressive thermal conductivity. Therefore Mg alloys have the potential to be various functional materials, such as hydrogen storage material, rechargeable electrochemical batteries, damping material, biodegradable implant material, electromagnetic shielding material, and thermal conductive material. Unfortunately, each kind of functional material has bottlenecks needing to be broken through, and a lot of researches have to be carried out. This review comprehensively covers the research progress and the up-to-date summary of Mg and Mg alloys as functional materials in recent years. The six kinds of functional materials above all will be discussed.

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“…Many researches have been conducted to improve die properties. Some of the methods are direct metal deposited (DMD), cast alloy with new composition, selective laser melting (SLM), direct metal laser sintering (DMLS), spray forming and powder metallurgy hot press [21,[23][24][25][26][27]. Table 1 outlines several works on the modification of thermal properties of different alloys using different techniques.…”

Section: Development Of High Thermal Conductivity Die Materialsmentioning

confidence: 99%

An overview of high thermal conductive hot press forming die material development

Zulhishamuddin¹,

Aqida²

2015

J. Mech. Eng. Sci.

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Most of the automotive industries are using high strength steel components, which are produced via hot press forming process. This process requires die material with high thermal conductivity that increases cooling rate during simultaneous quenching and forming stage. Due to the benefit of high quenching rate, thermal conductive die materials were produced by adding carbide former elements. This paper presents an overview of the modification of alloying elements in tool steel for high thermal conductivity properties by transition metal elements addition. Different types of manufacturing processes involved in producing high thermal conductive materials were discussed. Methods reported were powder metallurgy hot press, direct metal deposition, selective laser melting, direct metal laser sintering and spray forming. Elements likes manganese, nickel, molybdenum, tungsten and chromium were proven to increase thermal conductivity properties. Thermal conductivity properties resulted from carbide network presence in the steel microstructure. To develop feasible and low cost hot press forming die material, casting of Fe-based alloy with carbide former composition can be an option. Current thermal conductivity properties of hot press forming die material range between 25 and 66 W/m.K. The wide range of thermal conductivity varies the mechanical properties of the resulting components and lifetime of HPF dies.

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Thermal characteristics of Mg–Zn–Mn alloys with high specific strength and high thermal conductivity

Cited by 87 publications

References 15 publications

Evaluation of the Effect of Nd Content and Extrusion Process on Thermal Conductivity of Mg-Mn-Zn-Nd Alloys

Evaluation of the Effect of Nd Content and Extrusion Process on Thermal Conductivity of Mg-Mn-Zn-Nd Alloys

Research Progress in Magnesium Alloys as Functional Materials

An overview of high thermal conductive hot press forming die material development

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