MICROSTRUCTURES AND PROPERTIES OF AZ31 MAGNESIUM ALLOYS FORMED BY MULTI-CHANNEL PORTHOLE EXTRUSION

被引：0

作者：

Wu, Shikai ^{[1
]}

Cui, HongBao ^{[1
]}

Yang, WenPeng ^{[1
]}

Guo, XueFeng ^{[1
]}

机构：

[1] Henan Polytech Univ, Mat Sci & Engn Coll, Jiaozuo 454000, Peoples R China

来源：

ENGINEERING REVIEW | 2018年 / 38卷 / 01期

关键词：

AZ31 magnesium alloy; Multi-channel porthole extrusion; Dynamic recrystallization; Extrusion temperature; Extrusion ratio;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study investigated the effects of different extrusion temperatures and extrusion ratios on the microstructures and properties of AZ31 magnesium alloys formed by multi-channel porthole extrusion. The experimental results showed that equiaxed grains were formed during the dynamic recrystallization process and that alloy grains were refined by extrusion. Increased extrusion temperatures (from 340 degrees C to 420 degrees C) resulted in larger alloy grains and decreased tensile strength of the alloy. Increased extrusion ratios (from 9 to 25) resulted in refined alloy grains and increased tensile strength of the alloy. Under conditions of low extrusion temperature and high extrusion ratio, the tensile strength and elongation of magnesium alloys were effectively improved. AZ31 magnesium alloys produced by multi-channel porthole extrusion at the extrusion temperature of 340 degrees C and the extrusion ratio of 25 possessed the finest average grain sizes (1.6 mu m in the weld zone, 6.6 mu m in the non-weld zone) and the maximum tensile strength (290 MPa) and elongation (20.8 %).

引用

页码：11 / 19

页数：9

共 17 条

[1] Microstructure, crystallographic texture, and plastic anisotropy evolution in an Mg alloy during equal channel angular extrusion processing [J].

Al-Maharbi, Majid ;

Karaman, Ibrahim ;

Beyerlein, Irene J. ;

Foley, David ;

Hartwig, K. Ted ;

Kecskes, Laszlo J. ;

Mathaudhu, Suveen N. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (25-26) :7616-7627

[2]

Bao J, 2013, ENG REV, V33, P151

[3] Effect of strain ratio and strain rate on low cycle fatigue behavior of AZ31 wrought magnesium alloy [J].

Begum, S. ;

Chen, D. L. ;

Xu, S. ;

Luo, Alan A. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2009, 517 (1-2) :334-343

[4] Comparisons of microstructure, thixoformability and mechanical properties of high performance wrought magnesium alloys reheated from the as-cast and extruded states [J].

Chen, Qiang ;

Yuan, Baoguo ;

Lin, Jun ;

Xia, Xiangsheng ;

Zhao, Zude ;

Shu, Dayu .

JOURNAL OF ALLOYS AND COMPOUNDS, 2014, 584 :63-75

[5] Hot tensile deformation and fracture behaviors of AZ31 magnesium alloy [J].

Deng, Jiao ;

Lin, Y. C. ;

Li, Shui-Sheng ;

Chen, Jian ;

Ding, Yi .

MATERIALS & DESIGN, 2013, 49 :209-219

[6] An asymmetric elastic-plastic analysis of the load-controlled rotating bending test and its application in the fatigue life estimation of wrought magnesium AZ31B [J].

Kalatehmollaei, E. ;

Mahmoudi-Asl, H. ;

Jahed, H. .

INTERNATIONAL JOURNAL OF FATIGUE, 2014, 64 :33-41

[7]

Lai ZH, 2013, ENG REV, V33, P173

[8] Deformation and fracture behavior of hot extruded Mg alloys AZ31 [J].

Lu, Liwei ;

Liu, Tianmo ;

Chen, Yong ;

Wang, Zhongchang .

MATERIALS CHARACTERIZATION, 2012, 67 :93-100

[9] Mechanical responses and deformation mechanisms of an AZ31 Mg alloy sheet under dynamic and simple shear deformations [J].

Pandey, Amit ;

Kabirian, Farhoud ;

Hwang, Ji-Hyun ;

Choi, Shi-Hoon ;

Khan, Akhtar S. .

INTERNATIONAL JOURNAL OF PLASTICITY, 2015, 68 :111-131

[10] Numerical simulation of microstructure evolution in AZ31 magnesium alloy during equal channel angular pressing [J].

Ren, Guocheng ;

Lin, Xiaojuan ;

Xu, Shubo .

MICRO-NANO TECHNOLOGY XV, 2014, 609-610 :495-499

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