Strain-induced dynamic precipitation of Mg17Al12 phases in Mg-8Al alloys sheets rolled at 748 K

被引:83
作者
Guo, Fei [1 ]
Zhang, Dingfei [1 ,2 ]
Yang, Xusheng [1 ]
Jiang, Luyao [1 ]
Pan, Fusheng [2 ,3 ]
机构
[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400045, Peoples R China
[2] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China
[3] Chongqing Acad Sci & Technol, Chongqing 401123, Peoples R China
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 636卷
基金
中国国家自然科学基金;
关键词
Magnesium alloys; Precipitation; Deformation strain; Mechanical properties; ND-ZR ALLOY; MECHANICAL-PROPERTIES; HOT DEFORMATION; TEXTURE EVOLUTION; MAGNESIUM ALLOYS; ROLLING SPEED; MG ALLOYS; MICROSTRUCTURE; STRENGTH; RECRYSTALLIZATION;
D O I
10.1016/j.msea.2015.03.112
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Strain-induced dynamic precipitation of Mg17Al12 phases was observed in large strain hot rolling of Mg-8Al alloys sheets. Our results show that Mg17Al12 phase precipitates in dynamic recrystallization of grains due to severe plastic deformation and the amount of secondary particles increases with increasing deformation strain. Two types of nanoscale Mg17Al12 phases precipitated inside dynamic recrystallized grains were observed. The growth of dynamic recrystallized grains is constricted by the pinning effect of beta phase. The mechanical properties of rolled sheets are largely influenced by the increase of the deformation strain. It shows that the increase of ultimate tensile strength of rolled sheets can be segregated into two different stages, which are similar to the enhancement of dynamic recrystallization. The tendency of mechanical properties evolution of rolled sheets reveals that strain-induced precipitates have excellent hardening behavior and it can be considered as a promising way in improving mechanical properties of Mg alloys. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:516 / 521
页数:6
相关论文
共 31 条
[1]   Discontinuous and continuous precipitation in magnesium-aluminium type alloys [J].
Braszczynska-Malik, K. N. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 477 (1-2) :870-876
[2]   Texture effects on development of shear bands in rolled AZ31 alloy [J].
Chun, Y. B. ;
Davies, C. H. J. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2012, 556 :253-259
[3]   Texture evolution during large-strain hot rolling of the Mg AZ61 alloy [J].
del Valle, JA ;
Pérez-Prado, MT ;
Ruano, OA .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 355 (1-2) :68-78
[4]   Current issues in recrystallization: a review [J].
Doherty, RD ;
Hughes, DA ;
Humphreys, FJ ;
Jonas, JJ ;
Jensen, DJ ;
Kassner, ME ;
King, WE ;
McNelley, TR ;
McQueen, HJ ;
Rollett, AD .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1997, 238 (02) :219-274
[5]   MORPHOLOGY AND CHEMICAL NANOANALYSIS OF DISCONTINUOUS PRECIPITATION IN MG-AL ALLOYS .2. IRREGULAR GROWTH [J].
DULY, D ;
CHEYNET, MC ;
BRECHET, Y .
ACTA METALLURGICA ET MATERIALIA, 1994, 42 (11) :3855-3863
[6]   Shear banding phenomenon during severe plastic deformation of an AZ31 magnesium alloy [J].
Fatemi-Varzaneh, S. M. ;
Zarei-Hanzaki, A. ;
Cabrera, J. M. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2011, 509 (09) :3806-3810
[7]   Effect of rolling speed on microstructure and mechanical properties of AZ31 Mg alloys rolled with a wide thickness reduction range [J].
Guo, Fei ;
Zhang, Dingfei ;
Yang, Xusheng ;
Jiang, Luyao ;
Chai, Sensen ;
Pan, Fusheng .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2014, 619 :66-72
[8]   Influence of rolling speed on microstructure and mechanical properties of AZ31 Mg alloy rolled by large strain hot rolling [J].
Guo, Fei ;
Zhang, Dingfei ;
Yang, Xusheng ;
Jiang, Luyao ;
Chai, Sensen ;
Pan, Fusheng .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2014, 607 :383-389
[9]   Effect of Ca-addition on dynamic recrystallization of Mg-Zn alloy during hot deformation [J].
Hradilova, Monika ;
Montheillet, Frank ;
Fraczkiewicz, Anna ;
Desrayaud, Christophe ;
Lejcek, Pavel .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 580 :217-226
[10]   Microstructure and mechanical properties of AZ80 magnesium alloy sheet processed by differential speed rolling [J].
Huang, Xinsheng ;
Suzuki, Kazutaka ;
Saito, Naobumi .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2009, 508 (1-2) :226-233