On grain coarsening and refining of the Mg-3Al alloy by Sm

被引：32
作者：
Hu, Xiaoyu [1 ,2 ,3 ]
Fu, Penghuai [1 ,2 ]
StJohn, David [3 ]
Peng, Liming [1 ,2 ]
Sun, Ming [1 ,2 ]
Zhang, Mingxing [3 ]
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
[3] Univ Queensland, Sch Mech & Mat Engn, Ctr Adv Mat Proc & Mfg, St Lucia, Qld 4072, Australia
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 663卷
基金：
澳大利亚研究理事会; 中国国家自然科学基金;
关键词：
Solidification; Metals and alloys; Rare earth compounds; Nucleation; MECHANICAL-PROPERTIES; MAGNESIUM ALLOYS; REFINEMENT; MICROSTRUCTURE; AZ31; NUCLEATION; ADDITIONS; CRYSTALLOGRAPHY; ALUMINUM; POTENCY;
D O I：
10.1016/j.jallcom.2015.11.193
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effect of Sm on the microstructure of a Mg-3Al alloy has been investigated where it was found that the size of the primary alpha-Mg grains was significantly coarsened by the addition of 0.7 wt. % Sm, but dramatically refined by 2.1 wt. % Sm. It is proposed that the coarsening effect of Sm is due to a decrease in the nucleation potency of the native Al-Fe-C-O particles when they transform to the lower potency Al-Fe-Sm-C-O particles. The grain refinement observed when 2.1 wt. % Sm is added, is caused by the formation of potent Al2Sm nucleant particles prior to the solidification of alpha-Mg. The "Interdependence Theory" was then applied to describe the nucleant selection process in the Mg-3Al-2.1Sm alloy. (C) 2015 Elsevier B.V. All rights reserved.
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页码：387 / 394
页数：8
相关论文
共 45 条
[1]   Current research progress in grain refinement of cast magnesium alloys: A review article [J].
Ali, Yahia ;
Qiu, Dong ;
Jiang, Bin ;
Pan, Fusheng ;
Zhang, Ming-Xing .
JOURNAL OF ALLOYS AND COMPOUNDS, 2015, 619 :639-651
[2]  
Cao P, 2005, MAGNESIUM TECHNOLOGY 2005, P297
[3]   The role of Al2Y in grain refinement in Mg-Al-Y alloy system [J].
Chang, H. -W. ;
Qiu, D. ;
Taylor, J. A. ;
Easton, M. A. ;
Zhang, M. -X. .
JOURNAL OF MAGNESIUM AND ALLOYS, 2013, 1 (02) :115-121
[4]   Microstructure and mechanical properties of Mg-Al-based alloy modified with cerium [J].
Chaubey, A. K. ;
Scudino, S. ;
Prashanth, K. G. ;
Eckert, J. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2015, 625 :46-49
[5]   Significant effects of adding trace amounts of Ti on the microstructure and corrosion properties of Mg-6Al-1Zn magnesium alloy [J].
Choi, J. Y. ;
Kim, W. J. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2014, 614 :49-55
[6]   Grain refinement of Mg-10Gd alloy by Al additions [J].
Dai, Jichun ;
Easton, Mark ;
Zhu, Suming ;
Wu, Guohua ;
Ding, Wenjiang .
JOURNAL OF MATERIALS RESEARCH, 2012, 27 (21) :2790-2797
[7]   An analysis of the relationship between grain size, solute content, and the potency and number density of nucleant particles [J].
Easton, M ;
StJohn, D .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2005, 36A (07) :1911-1920
[8]   A model of grain refinement incorporating alloy constitution and potency of heterogeneous nucleant particles [J].
Easton, MA ;
StJohn, DH .
ACTA MATERIALIA, 2001, 49 (10) :1867-1878
[9]  
Emley E.F., 1966, PRINCIPLES MAGNESIUM
[10]   The development of a new grain refiner for magnesium alloys using the edge-to-edge model [J].
Fu, H. M. ;
Qiu, D. ;
Zhang, M. X. ;
Wang, H. ;
Kelly, P. M. ;
Taylor, J. A. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 456 (1-2) :390-394
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