Microstructure and mechanical properties of Mg-9Li-3Al-xGd alloys

被引：10

作者：

Zhang, B. ^{[1
]}

Peng, X. D. ^{[1
]}

Ma, Y. ^{[1
]}

Li, Y. M. ^{[1
]}

Yu, Y. Q. ^{[1
]}

Wei, G. B. ^{[1
,2
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China

[2] Univ Waterloo, Coll Mech & Mechatron Engn, Waterloo, ON N2L 3G1, Canada

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2015年 / 31卷 / 09期

关键词：

Mg-Li-Al alloy; Microstructure; Mechanical properties; GRAIN-REFINEMENT; DEFORMATION-BEHAVIOR; ALUMINUM-ALLOYS; STRENGTH; TEXTURE; ELEMENT; GD;

D O I：

10.1179/1743284714Y.0000000711

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of gadolinium on the microstructure and mechanical properties of Mg-9Li-3Al alloy was investigated. Results show that the addition of Gd can effectively refine the alpha-Mg phase and change the morphology of the alpha-Mg phase. Meanwhile, the Al3Gd phase is mainly distributed at the boundaries of the alpha-Mg phase and inside the alpha-Mg phase. The mechanical property tests reveal that the addition of Gd can effectively improve the mechanical properties of the as cast alloys. When the content of Gd is 2.0%, the tensile strength and yield stress (engineering stress) reach max values of 188 and 174 MPa respectively. When the content of Gd addition is 2.5%, the elongation of the alloy is 15.7%.

引用

页码：1035 / 1041

页数：7

共 34 条

[11] Processing and mechanical properties of magnesium-lithium composites containing steel fibers [J].

Jensen, JA ;

Chumbley, LS .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1998, 29 (03) :863-873

[12] Grain refinement of Mg-Li-Al cast alloys by adding typical master alloys [J].

Jiang, Bin ;

Yang, Qing-shan ;

Zhang, Ming-xing ;

Qiu, Dong ;

Li, Rui-hong ;

Pan, Fu-sheng .

PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL, 2011, 21 (03) :236-239

[13]

Jin JB, 2006, ACTA METALL SIN, V42, P1014

[14] Effect of Y, Sr, and Nd additions on the microstructure and microfracture mechanism of squeeze-cast AZ91-X magnesium alloys [J].

Lee, S ;

Lee, SH ;

Kim, DH .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1998, 29 (04) :1221-1235

[15] Mechanical properties of a two-phase alloy Mg-8%Li-1%Al processed by equal channel angular pressing [J].

Liu, T ;

Zhang, W ;

Wu, SD ;

Jiang, CB ;

Li, SX ;

Xu, YB .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 360 (1-2) :345-349

[16] Magnesium casting technology for structural applications [J].

Luo, Alan A. .

JOURNAL OF MAGNESIUM AND ALLOYS, 2013, 1 (01) :2-22

[17] A THERMODYNAMIC OPTIMIZATION OF THE AL-Y SYSTEM [J].

RAN, QS ;

LUKAS, HL ;

EFFENBERG, G ;

PETZOW, G .

JOURNAL OF THE LESS-COMMON METALS, 1989, 146 (1-2) :213-222

[18] Microstructure and strength of quasicrystal containing extruded Mg-Zn-Y alloys for elevated temperature application [J].

Singh, A ;

Watanabe, M ;

Kato, A ;

Tsai, AP .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 385 (1-2) :382-396

[19] Characteristics of superplasticity domain in the processing map for hot working of as-cast Mg-11.5Li-1.5Al alloy [J].

Sivakesavam, O ;

Prasad, YVRK .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 323 (1-2) :270-277

[20] Effect of composition on the texture and deformation behaviour of wrought Mg alloys [J].

Stanford, N. ;

Barnett, M. .

SCRIPTA MATERIALIA, 2008, 58 (03) :179-182

← 1 2 3 4 →