[1] Bai Jing, Sun Yangshan, Ding Shaosong, Xue Feng, et al. Microstructure and tensile properties of AE42-basedmagnesium alloys with calcium addition [J]. Journal of Southeast University (English Edition), 2004, 20 (1): 43-48. [doi:10.3969/j.issn.1003-7985.2004.01.009]

Copy

Microstructure and tensile properties of AE42-basedmagnesium alloys with calcium addition()

Share：

Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

20

Issue:

2004 1

Page:

43-48

Research Field:

Materials Sciences and Engineering

Publishing date:

2004-03-30

Info

Title:

Microstructure and tensile properties of AE42-basedmagnesium alloys with calcium addition

Author(s):

Bai Jing;  Sun Yangshan;  Ding Shaosong;  Xue Feng;  Wang Li

Department of Materials Science and Engineering, Southeast University, Nanjing 210096, China

Keywords:

AE42-based magnesium alloys;  calcium;  microstructure;  tensile properties

PACS:

TG146

DOI:

10.3969/j.issn.1003-7985.2004.01.009

Abstract:

The as-cast microstructure of AE42 was of typical dendritic and composed of the α matrix and some needle-shaped interphases Al₁₁RE₃. A small amount of Ca addition results in significant microstructural refinement and formation of a new phase Al₂Ca, which showed two kinds of morphologies, lamellar and tiny granular. The former distributes on grain boundaries and the later is within the matrix grains. With the increase of Ca addition the volume fraction of Al-RE compound(Al₁₁RE₃)decreases, but Al₂Ca increases. Addition of Ca causes a significant increase of yield strength of the alloy both at ambient and elevated temperatures, but a little decrease of the ductility. With calcium addition the ultimate strength decreases at ambient temperature and 150 ℃, but increases at 175 ℃ and 200 ℃.

References:

[1] Zhang Zhan, Couture A. Investigation of the properties of Mg-Zn-Al alloys [J]. Scripta Materialia, 1998, 39(1): 45-53.
[2] Lu Yizhen, Wang Qudong, Zeng Xiaoqin, et al. Effects of rare earths on the microstructure, properties and fracture behavior of Mg-Al alloys [J]. Materials Science and Engineering A, 1999, 278(1, 2): 66-76.
[3] Makino. Magnesium alloy [P]. United States Patent 5681403, 1997.
[4] Ozturk K, Yu Zhong, Liu Zikui. Computational thermodynamics and experimental investigation of Mg-Al-Ca alloys [A]. In: Hryn J ed. TMS Annual Meeting [C]. New Orleans: Minerals, Metals and Materials Society, 2001. 113-117.
[5] Hutt J E C, St John D H, Hogan L, et al. Effect of grain refinement and silicon content on grain formation in hypoeutectic Al-Si alloys [J]. Materials Science and Engineering A, 1999, 259(1): 43-52.
[6] Hutt J E C, Dahle A K, Lee Y C, et al. Effects of growth restriction and effective nucleant potency on grain size and morphology in Al-Si and Al-Cu alloys [A]. In: Eckert C E, ed. TMS Annual Meeting [C]. San Diego: Minerals, Metals and Materials Society, 1999. 685-692.
[7] Dahle A K, Lee Y C, Nave M D, et al. Development of the as-cast microstructure in magnesium—aluminium alloys [J]. Journal of Light Metals, 2001, 1(1): 61-72.
[8] Massalski T B, Okamoto H. Binary alloy phase dia￣grams requiring further studies [J]. ASM International, 1994, 15(5): 500-521.
[9] Pekguleryuz Mihriban O, Baril Eric. Creep resistant magnesium diecasting alloys based on alkaline earth elements [J]. Materials Transactions, 2001, 7(42): 1258-1267.
[10] Powell A, Rezhets V, Balogh M, et al. The relationship between microstructure and creep behavior in AE-42 magnesium die casting alloy [A]. In: Hryn J, ed. TMS Annual Meeting [C]. New Orleans: Minerals, Metals and Materials Society, 2001. 175-181.
[11] Min Xuegang, Sun Yangshan. Analysis of valence electron structures(VES)of intermetallic compounds containing calcium in Mg-Al-based alloys [J]. Materials Chemistry and Physics, 2003, 78(1): 88-93.
[12] Luo A A, Powell B R. Tensile and compressive creep of magnesium-aluminum-calcium based alloys [A]. In: Hryn J, ed. TMS Annual Meeting [C]. New Orleans: Minerals, Metals and Materials Society, 2001. 137-144.
[13] Ding Shaosong, Sun Yangshan. Effect of calcium addition on the microstructure and mechanical properties of AE41-based magnesium alloys [J]. Jiangsu Metallurgy, 2003, 31(1): 11-15.(in Chinese)
[14] Rudi R S, Kamado S, Lkeya N, et al. High temperature strength of semi-solid formed Mg-Zn-Al-Ca alloys [J]. Materials Science Forum, 2000, 350: 79-84.

Memo

Memo:

Biographies: Bai Jing(1981—), male, graduate; Sun Yangshan(corresponding author), male, doctor, professor, yssun@seu.edu.cn.

Common functions