Dynamic recrystallization and texture evolution of Mg-Y-Zn alloy during hot extrusion process

被引：55
作者：
Tong, L. B. [1 ]
Li, X. [2 ,3 ]
Zhang, D. P. [1 ]
Cheng, L. R. [1 ]
Zhang, H. J. [1 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resources Utilizat, Changchun 130022, Peoples R China
[2] Rhein Westfal TH Aachen, Inst Metallkunde & Metallphys, D-52056 Aachen, Germany
[3] Guangzhou Res Inst Nonferrous Met, Guangzhou 510651, Guangdong, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2014年 / 92卷
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
Mg-Y-Zn alloy; LPSO phase; Dynamic recrystallization; Microstructure; Texture evolution; MECHANICAL-PROPERTIES; MICROSTRUCTURE EVOLUTION; ELEVATED-TEMPERATURES; ORDERED PHASE; STRENGTH; SHEET; TWINS; AZ31;
D O I：
10.1016/j.matchar.2014.03.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure and texture evolution of Mg98.5Y1Zn0.5 and Mg92.5Y5Zn2.5 (atomic percent) alloys during hot extrusion were systematically investigated. The coarse LPSO phases with higher volume fraction (similar to 57%) suppressed the twinning generation in the initial stage of extrusion, and accelerated the dynamic recrystallization through the particle deformation zones. Therefore, the volume fraction of DRXed grains in as-extruded Mg92.5Y5Zn2.5 alloy was much higher than that of Mg98.5Y1Zn0.5 alloy. The intensive recrystallization process resulted in the conventional basal texture weakening, although the texture evolution was mainly dominated by flow behavior. The dynamic recrystallization behavior in Mg92.5Y5Zn2.5 alloy restricted the formation of deformation texture, and thus the more random texture was observed during the whole extrusion process. (C) 2014 Elsevier Inc. All rights reserved.
引用
收藏
页码：77 / 83
页数：7
相关论文
共 23 条
[1]   TENSILE-COMPRESSIVE YIELD ASYMMETRIES IN HIGH-STRENGTH WROUGHT MAGNESIUM ALLOYS [J].
BALL, EA ;
PRANGNELL, PB .
SCRIPTA METALLURGICA ET MATERIALIA, 1994, 31 (02) :111-116
[2]  
Clark JB, ACTA METALL
[3]   Microstructure evolution and mechanical properties of a particulate reinforced magnesium matrix composites forged at elevated temperatures [J].
Deng, K. K. ;
Wu, K. ;
Wang, X. J. ;
Wu, Y. W. ;
Hu, X. S. ;
Zheng, M. Y. ;
Gan, W. M. ;
Brokmeier, H. G. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (06) :1630-1635
[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]   The interaction of twins and precipitates in a Mg-7.7 at.% Al alloy [J].
Gharghouri, MA ;
Weatherly, GC ;
Embury, JD .
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1998, 78 (05) :1137-1149
[6]   A high-strength Mg-Ni-Y alloy sheet with a long-period ordered phase prepared by hot-rolling [J].
Itoi, T. ;
Takahashi, K. ;
Moriyama, H. ;
Hirohashi, M. .
SCRIPTA MATERIALIA, 2008, 59 (10) :1155-1158
[7]   Particle-stimulated nucleation of dynamic recrystallization in AZ31 alloy at elevated temperatures [J].
Jiang, L ;
Huang, G ;
Godet, S ;
Jonas, JJ ;
Luo, AA .
MAGNESIUM - SCIENCE, TECHNOLOGY AND APPLICATIONS, 2005, 488-489 :261-264
[8]   Rapidly solidified powder metallurgy Mg97Zn1Y2Alloys with excellent tensile yield strength above 600 MPa [J].
Kawamura, Y ;
Hayashi, K ;
Inoue, A ;
Masumoto, T .
MATERIALS TRANSACTIONS, 2001, 42 (07) :1172-1176
[9]   Microstructure and texture evolution of Mg alloys during twin-roll casting and subsequent hot rolling [J].
Kim, Kyung-Hun ;
Suh, Byeong-Chan ;
Bae, Jun Ho ;
Shim, Myeong-Shik ;
Kim, S. ;
Kim, Nack J. .
SCRIPTA MATERIALIA, 2010, 63 (07) :716-720
[10]   Development of high-strength magnesium alloys via combined processes of extrusion, rolling and ageing [J].
Li, R. G. ;
Nie, J. F. ;
Huang, G. J. ;
Xin, Y. C. ;
Liu, Q. .
SCRIPTA MATERIALIA, 2011, 64 (10) :950-953
123