Simultaneous achievement of high thermal conductivity, high strength and formability in Mg-Zn-Ca-Zr sheet alloy

被引：59

作者：

Li, Z. H. ^{[1
,2
]}

Sasaki, T. T. ^{[1
]}

Shiroyama, T. ^{[3
]}

Miura, A. ^{[1
]}

Uchida, K. ^{[1
]}

Hono, K. ^{[1
,2
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[2] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki, Japan

[3] LG Japan Lab In, Tokyo, Japan

来源：

MATERIALS RESEARCH LETTERS | 2020年 / 8卷 / 09期

关键词：

Magnesium alloy; thermal conductivity; strength; precipitation; atom probe; MAGNESIUM; TEMPERATURE;

D O I：

10.1080/21663831.2020.1759718

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Lightweight magnesium alloys with good thermal conductance are in demand for structural components in portable devices. This work presents a strategy to achieve excellent thermal conductivity, room temperature (RT) formability and high strength in magnesium sheet alloys. We found that a Mg-1.6Zn-0.5Ca-0.4Zr alloy shows a substantial increase in thermal conductivity to over 130 W/(m center dot K) due to the reduced supersaturation of solute atoms in the matrix by the precipitation of Guinier-Preston (G.P.) zones while exhibiting excellent RT formability with a large Index Erichsen value of 8.1 mm, and a high yield strength of 227 MPa by peak aging treatment. IMPACT STATEMENT This work reports a superiority of heat treatable magnesium alloy in simultaneously achieving high thermal conductivity and excellent mechanical properties through quantitative analysis of the microstructure in atomic scale.

引用

页码：335 / 340

页数：6

共 19 条

[1]

Ashcroft N. W., 1988, Solid State Physics

[2]

Avedesian M.M., 1999, MAGNESIUM MAGNESIUM

[3] Improving Formability of Mg-Ca-Zr Sheet Alloy by Microalloying of Zn [J].

Bian, Ming Zhe ;

Zeng, Zhuo Ran ;

Xu, Shi Wei ;

Zhu, Su Ming ;

Zhu, Yu Man ;

Davies, Christopher Huw John ;

Birbilis, Nick ;

Nie, Jian Feng .

ADVANCED ENGINEERING MATERIALS, 2016, 18 (10) :1763-1769

[4] Effects of Zinc Concentration on the Stretch Formability at Room Temperature of the Rolled Mg-Zn-Ca Alloys [J].

Chino, Yasumasa ;

Sassa, Kensuke ;

Huang, Xinsheng ;

Suzuki, Kazutaka ;

Mabuchi, Mamoru .

JOURNAL OF THE JAPAN INSTITUTE OF METALS, 2011, 75 (01) :35-41

[5] Electron mean free path in elemental metals [J].

Gall, Daniel .

JOURNAL OF APPLIED PHYSICS, 2016, 119 (08)

[6] Transmission electron microscopy of Zr-Zn precipitate rods in magnesium alloys containing Zr and Zn [J].

Gao, X. ;

Muddle, B. C. ;

Nie, J. F. .

PHILOSOPHICAL MAGAZINE LETTERS, 2009, 89 (01) :33-43

[7] Aluminium alloys for automotive application [J].

Hirsch, J .

ALUMINIUM ALLOYS: THEIR PHYSICAL AND MECHANICAL PROPERTIES, PART 4/SUPPLEMENT, 1997, 242 :33-49

[8] Effect of Zr addition on the mechanical properties of as-extruded Mg-Zn-Ca-Zr alloys [J].

Homma, T. ;

Mendis, C. L. ;

Hono, K. ;

Kamado, S. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (09) :2356-2362

[9] Microstructure and thermal conductivity of Mg-2Zn-Zr alloy [J].

Li, Bingcheng ;

Hou, Legan ;

Wu, Ruizhi ;

Zhang, Jinghuai ;

Li, Xinlin ;

Zhang, Milin ;

Dong, Anping ;

Sun, Baode .

JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 722 :772-777

[10] A review on thermal conductivity of magnesium and its alloys [J].

Li, Shubo ;

Yang, Xinyu ;

Hou, Jiangtao ;

Du, Wenbo .

JOURNAL OF MAGNESIUM AND ALLOYS, 2020, 8 (01) :78-90

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