Microstructure evolution and tensile properties of hot rolled Mg-6Al-3Sn alloy sheet at elevated temperatures

被引：26

作者：

Luo, Dan

Wang, Hui-Yuan ^{[1
]}

Zhang, Lei

Liu, Guo-Jun

Li, Jin-Biao

Jiang, Qi-Chuan

机构：

[1] Jilin Univ, Minist Educ, Key Lab Automobile Mat, Changchun 130025, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 643卷

基金：

国家教育部博士点专项基金资助;

关键词：

Magnesium alloy; Microstructure; Recrystallization; Mechanical characterization; STRAIN-HARDENING ABILITY; MG ALLOYS; AS-CAST; FRACTURE-TOUGHNESS; MG-3AL-3SN ALLOY; GRAIN-REFINEMENT; DEFORMATION; BEHAVIOR; TEXTURE; RECRYSTALLIZATION;

D O I：

10.1016/j.msea.2015.07.005

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A fine-grained (similar to 3.61 mu m) Mg-6Al-3Sn (AT63) alloy prepared by a hot rolled method is subjected to uniaxial tensile tests within the temperature range of 25-250 degrees C. Mg2Sn and Mg17Al12 precipitates at grain boundaries effectively retard the growth of dynamically recrystallized (DRXed) grains. Grain boundary sliding (GBS) is activated at 250 degrees C, which is indicated by the stable DRXed grain size and agglomeration of the precipitates at grain boundaries. Moreover, Mg2Sn and Mg17Al12 precipitates promote the formation of dynamic recrystallization (DRX). Both the DRX and GBS result in the high elongation (151.4%) of the AT63 alloy at 250 degrees C. Results obtained here will shed some light on elevated temperature deformation mechanisms of a new type of Mg-Al-Sn system, which is critical to the development of new Mg alloys with potential for applications at elevated temperatures. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：149 / 155

页数：7

共 43 条

[1] Temperature dependency of slip and twinning in plane strain compressed magnesium single crystals [J].

Chapuis, Adrien ;

Driver, Julian H. .

ACTA MATERIALIA, 2011, 59 (05) :1986-1994

[2] Facile ammonia-induced fabrication of nanoporous NiO films with enhanced lithium-storage properties [J].

Chen, Xin ;

Zhang, Naiqing ;

Sun, Kening .

ELECTROCHEMISTRY COMMUNICATIONS, 2012, 20 :137-140

[3] Influence of texture and grain size on work hardening and ductility in magnesium-based alloys processed by ECAP and rolling [J].

del Valle, J. A. ;

Carreno, F. ;

Ruano, O. A. .

ACTA MATERIALIA, 2006, 54 (16) :4247-4259

[4] Microstructure and elevated tensile properties of submicron SiCp/AZ91 magnesium matrix composite [J].

Deng, Kunkun ;

Wang, Cuiju ;

Wang, Xiaojun ;

Wu, Kun ;

Zheng, Mingyi .

MATERIALS & DESIGN, 2012, 38 :110-114

[5] Tensile properties of hot rolled Mg-3Sn-1Ca alloy sheets at elevated temperatures [J].

Hasani, G. H. ;

Mahmudi, R. .

MATERIALS & DESIGN, 2011, 32 (07) :3736-3741

[6] Damping behaviors of as-cast and solution-treated AZ91-Ca magnesium alloys [J].

Jun, Joong-Hwan .

JOURNAL OF ALLOYS AND COMPOUNDS, 2014, 610 :169-172

[7] Effect of strain-induced precipitation on dynamic recrystallization in Mg-Al-Sn alloys [J].

Kabir, Abu Syed Hurnaun ;

Sanjari, Mehdi ;

Su, Jing ;

Jung, In-Ho ;

Yue, Stephen .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2014, 616 :252-259

[8] In situ fracture observation and fracture toughness analysis of squeeze cast AZ51-xSn magnesium alloys [J].

Kim, Byeongho ;

Do, Jeonghyeon ;

Lee, Sunghak ;

Park, Ikmin .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (24-25) :6745-6757

[9] Enhanced superplasticity and diffusional creep in ultrafine-grained Mg-6Al-1Zn alloy with high thermal stability [J].

Kim, W. J. ;

Park, I. B. .

SCRIPTA MATERIALIA, 2013, 68 (3-4) :179-182

[10] Enhancement of the strain hardening ability in ultrafine grained Mg alloys with high strength [J].

Kim, W. J. ;

Hong, S. I. ;

Kim, Y. H. .

SCRIPTA MATERIALIA, 2012, 67 (7-8) :689-692

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