Exploring the mechanism of "Rare Earth" texture evolution in a lean Mg-Zn-Ca alloy

被引：86
作者：
Guan, Dikai [1 ]
Liu, Xingguang [1 ]
Gao, Junheng [1 ]
Ma, Le [1 ]
Wynne, Bradley P. [1 ]
Rainforth, W. Mark [1 ]
机构：
[1] Univ Sheffield, Dept Mat Sci & Engn, Sheffield S1 3JD, S Yorkshire, England
来源：
SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期
基金：
英国工程与自然科学研究理事会;
关键词：
RECRYSTALLIZATION NUCLEATION SITES; MAGNESIUM ALLOYS; STATIC RECRYSTALLIZATION; HIGH-STRENGTH; GRAIN-GROWTH; DUCTILITY; DEFORMATION; SEGREGATION; CALCIUM; MICROSTRUCTURE;
D O I：
10.1038/s41598-019-43415-z
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The entire recrystallisation sequence and associated crystallographic texture evolution of Mg-0.8Zn-0.2Ca (wt.%) alloy was tracked using a quasi-in-situ electron backscatter diffraction (EBSD) method. Characteristic "Rare Earth" (RE) texture was formed, originating mainly from double twins and twinning-related shear bands consisting of compression and double twins. The RE textures appeared during the nucleation stage and were preserved during the relative uniform grain growth period because of solute segregation and concurrent precipitation although the alloying element content was very low. Ca and Zn co-segregated along grain boundaries with no evidence that segregation was preferred along special types of grain boundaries. The interactions between deformation microstructures, concurrent precipitation, solute drag, grain growth and texture evolution are discussed in detail. All the results indicate that Ca performs a similar role to that of RE elements in forming RE texture.
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页数：11
相关论文
共 49 条
[1]   Sheet texture modification in magnesium-based alloys by selective rare earth alloying [J].
Al-Samman, T. ;
Li, X. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (10-11) :3809-3822
[2]   TENSILE-COMPRESSIVE YIELD ASYMMETRIES IN HIGH-STRENGTH WROUGHT MAGNESIUM ALLOYS [J].
BALL, EA ;
PRANGNELL, PB .
SCRIPTA METALLURGICA ET MATERIALIA, 1994, 31 (02) :111-116
[3]   Twinning and the ductility of magnesium alloys Part I: "Tension" twins [J].
Barnett, M. R. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 464 (1-2) :1-7
[4]   The effect of rare earth element segregation on grain boundary energy and mobility in magnesium and ensuing texture weakening [J].
Barrett, Christopher D. ;
Imandoust, Aidin ;
El Kadiri, Haitham .
SCRIPTA MATERIALIA, 2018, 146 :46-50
[5]   Effect of grain boundaries on texture formation during dynamic recrystallization of magnesium alloys [J].
Barrett, Christopher D. ;
Imandoust, Aidin ;
Oppedal, Andrew L. ;
Inal, Kaan ;
Tschopp, Mark A. ;
El Kadiri, Haitham .
ACTA MATERIALIA, 2017, 128 :270-283
[6]   The role of atomic scale segregation in designing highly ductile magnesium alloys [J].
Basu, I. ;
Pradeep, K. G. ;
Miessen, C. ;
Barrales-Mora, L. A. ;
Al-Samman, T. .
ACTA MATERIALIA, 2016, 116 :77-94
[7]   Twin recrystallization mechanisms in magnesium-rare earth alloys [J].
Basu, I. ;
Al-Samman, T. .
ACTA MATERIALIA, 2015, 96 :111-132
[8]   Triggering rare earth texture modification in magnesium alloys by addition of zinc and zirconium [J].
Basu, I. ;
Al-Samman, T. .
ACTA MATERIALIA, 2014, 67 :116-133
[9]   Shear band-related recrystallization and grain growth in two rolled magnesium-rare earth alloys [J].
Basu, I. ;
Al-Samman, T. ;
Gottstein, G. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 579 :50-56
[10]   Texture enhancement during grain growth of magnesium alloy AZ31B [J].
Bhattacharyya, J. J. ;
Agnew, S. R. ;
Muralidharan, G. .
ACTA MATERIALIA, 2015, 86 :80-94
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