Al含量对Mg-Al亚共晶合金热收缩行为的影响

doi:10.11896/j.issn.1005-023X.2018.18.015

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Abstract The cooling curves and the various of shrinkage in the process of solidification and cooling were tested by using a self-made device which could achieve the one-dimensional shrinkage instead of 3D shrinkage of the casting. Then, the effects of Al content (0wt%,1.1wt%,3wt%,5wt%) on the thermal shrinkage of the binary Mg-Al as-cast alloys were obtained. And their mean linear expansion coefficients at low temperature range were got as well. As a result, the characterization of the thermal shrinkage behaviors of these hypoeutectic Mg-Al as-cast alloys was systematically investigated. The results indicated that the contract rate of the Mg-Al casting ascends at first and descends later with the temperature dropping after casting. Maximum shrinkage rate of molten (v_l, max) decreased with the increase of Al content (0%—5%) during solidification, but the decreasing range was weakened. Within a high temperature range of each alloy after solidification, the corresponding shrinkage rates would increase firstly and then decreased with the cooling temperature dropping. While, the linear shrinkage rates during low temperature shrinkage stage tended to be a constant at last for all tested materials. The average linear expansion coefficients of the alloys at the low temperatures (<400 ℃) increased with the increase of Al content (0%—5%).

Key words： magnesium alloy hypoeutectic thermal shrinkage aluminum content shrinkage rate

Published: 18 October 2018

CLC number:

TG146.2+2

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	Articles by authors
	MENG Yi
	YANG Yue
	CAO Leigang
	SUN Jian
	ZHANG Haitao
	CUI Jianzhong

Cite this article:

MENG Yi,YANG Yue,CAO Leigang, et al. Effect of Al on the Thermal Shrinkage Behavior of Hypoeutectic Mg-Al Alloys[J]. Materials Reports, 2018, 32(18): 3185-3189.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.18.015 OR http://www.mater-rep.com/EN/Y2018/V32/I18/3185

1 Jayalakshmi S, Khoo C G, Joshua K, et al. Feasibility study on utilizing carbon dioxide during the processing of Mg-Al alloys[J]. Journal of Materials Processing Technology,2011,211(8):1416.
2 Chen Y, Wu Z, Wang J H. Research status and prospects of Mg-Al-Mn magnesium alloys[J]. Materials Review,2015,29(S1):433(in Chinese).
陈阳,吴震,王金辉.Mg-Al-Mn系镁合金的研究现状与展望[J].材料导报,2015,29(专辑25):433.
3 Zhao S S, Peng Q M, Li H, et al. Effects of super-high pressure on microstructures, nano-mechanical behaviors and corrosion properties of Mg-Al alloys[J]. Journal of Alloys and Compounds,2014,584(3):56.
4 Cheng M Q, Xie G Y, Zhou B, et al. Microstructure and mechanical property of the Sb-modified Mg-10Al alloy[J]. Materials Review B:Research Papers,2012,26(6):42(in Chinese).
成满庆,谢国印,周斌,等.Sb变质Mg-10Al合金的组织与力学性能[J].材料导报:研究篇,2012,26(6):42.
5 Arne K D, Young C L, Mark D N, et al. Development of the as-cast microstructure in magnesium-aluminum alloys[J]. Journal of Light Metals,2011,1:61.
6 Wang Y S, Sun B D, Wang Q D. An understanding of the hot tea-ring mechanism in AZ91 magnesium alloy[J]. Materials Letters,2002,539(1-2):35.
7 Ding H, Fu H Z, Liu Z Y. Compensation of solidification contraction and hot cracking tendency of alloys[J]. Acta Metallurgica Sinica,1997,33(9):921(in Chinese).
丁浩,傅恒志,刘忠元.凝固收缩补偿与合金的热裂倾向[J].金属学报,1997,33(9):921.
8 Eskine D, Zuidema J, Katgerman L. Linear solidification contraction of binary and commercial aluminium alloys[J]. International Journal of Cast Metals Research,2002,14(4):217.
9 Li H Y, Bai Y Y, Zhang H T, et al. Effect of Mn on hot cracking tendency of Mg-6.5Zn alloys[J]. Acta Metallurgica Sinica,2014,50(10):1237(in Chinese).
李浩宇,柏媛媛, 张海涛,等.Mn对Mg-6.5Zn合金热裂倾向性的影响[J].金属学报,2014,50(10):1237.
10 Wang Y S, Zhang Y B, Ding W J. Hot tearing behavior testing of Mg alloy[J].Special-cast and Non-ferrous Alloys,2002(s1):13(in Chinese).
王业双,张咏波,丁文江.镁合金的热裂行为测试研究[J].特种铸造及有色合金,2002(s1):13.
11 Wang Y S, Wang Q D, Ma C J, et al. Hot-tearing susceptibility of Mg-9Al-xZn-yRE alloys[J].Transactions of Nonferrous Metals Society of China,2003,13(1):40(in Chinese).
王业双,王渠东,马春江,等.Zn和RE对Mg-9Al合金热裂倾向性的影响[J].中国有色金属学报,2003,13(1):40.
12 Zheng W C, Li S S, Tang B. Effect of rare earth on hot cracking resistance of Mg-Al alloys and its mechanism[J].Journal of the Chinese Rare Earth Society,2006,24(2):205(in Chinese).
郑伟超,李双寿,汤彬.稀土对镁-铝合金抗热裂性能的影响及其机制[J].中国稀土学报,2006,24(2):205.
13 Wang Y S, Wang Q D, Wu G H. Hot-tearing susceptibility of Mg-9Al-xZn alloy[J]. Materials Letters,2002,57(4):929.
14 Wang Z, Li Y Z, Wang F, et al. Hot tearing susceptibility of Mg-xZn-2Y alloys[J]. Transactions of Nonferrous Metals Society of China,2016,26:3115.
15 Noviko I I, Grushko O E. Hot cracking susceptibility of Al-Cu-Li and Al-Cu-Li-Mn alloys[J]. Materials Science and Technology,1995,11:926.
16 Cao G, Kou S. Hot cracking of binary Mg-Al alloy castings[J]. Materials Science Engineering A,2006,417:230.
17 Cao G, Kou S. Hot tearing of ternary Mg-Al-Ca alloy castings[J]. Metallurgy Materials Transaction A,2006,37:3647.
18 Zhen Z S, Hort N, Huang Y. Quantitative determination on hot tearing in Mg-Al binary alloys[J]. Materials Science Forum,2009,618-619:533.
19 Zhen Z S, Hort N, Utke O, et al. Investigations on hot tearing of Mg-Al binary alloys by using a new quantitative method[C]∥Minerals, Metals & Materials Society (TMS) 2009 Annual Meeting and Exhibition. California, 2009: 105.
20 Bichler L, Lee K, Elsayed A. Effect of mold and pouring temperature on the hot tearing of AZ91 magnesium alloy[J]. International Journal of Metalcasting,2008,1:43.
21 Huang H, Fu P H, Wang Y X, et al. Effect of pouring and mold temperatures on hot tearing susceptibility of AZ91D and Mg-3Nd-0.2Zn-Zr Mg alloys[J]. Transactions of Nonferrous Metals Society of China,2014,24(14):922.
22 Yang M B, Pan F S, Li Z S, et al. Alloying elements and their effects in Mg-Al based elevated temperature magnesium alloys[J]. Materials Review B: Research Papers,2005,19(4):46(in Chinese).
杨明波,潘复生,李忠盛,等.Mg-Al系耐热镁合金中的合金元素及其作用[J].材料导报:研究篇,2005,19(4):46.