Extrusion behaviour of AZ91 Mg alloy produced by spark plasma sintering

被引：2

作者：

Botelho, P. Augusto de Oliveira ^{[1
]}

Straffelini, G. ^{[1
]}

Menapace, C. ^{[1
]}

Mostaed, E. ^{[2
]}

Vedani, M. ^{[2
]}

机构：

[1] Univ Trento, Dept Ind Engn, I-38123 Trento, Italy

[2] Politecn Milan, Dept Mech Engn, I-20156 Milan, Italy

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2014年 / 30卷 / 15期

关键词：

AZ91 magnesium alloy; Hot extrusion; Spark plasma sintering; MAGNESIUM ALLOY; MECHANICAL-PROPERTIES; GRAIN-REFINEMENT; MICROSTRUCTURE; DEFORMATION;

D O I：

10.1179/1743284714Y.0000000614

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Within a wide project aiming at the production of fully bioabsorbable endovascular stents, cylindrical preforms of the AZ91 Mg alloy produced by SPS were submitted to hot extrusion tests. It has been found that hot extrusion produced a consolidation of the material accompanied by the occurrence of dynamic recrystallisation and a corresponding noticeable grain refinement. The microstructural characterisation revealed that the optimal extrusion conditions were 380 degrees C and 20 mm min(-1). Hot compression tests were also carried out to help in the explanation of the extrusion results and, in particular, to evaluate the friction coefficient during extrusion. It has been found that the lubrication should be improved to further optimise the process and obtain a product with superior quality.

引用

页码：1959 / 1965

页数：7

共 23 条

[1]

[Anonymous], 2013, E112 ASTM INT

[2]

[Anonymous], 1992, TRIBOLOGY FRICTION W

[3]

Braszczynska-Malik K., 2011, Precipitates of gamma-Mg17Al12 phase in Mg-Al alloys, Magnesium Alloys - Design, Processing and Properties

[4] Effects of extrusion ratio on the microstructure and mechanical properties of AZ31 Mg alloy [J].

Chen, Yongjun ;

Wang, Qudong ;

Peng, Jianguo ;

Zhai, Chunquan ;

Ding, Wenjiang .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2007, 182 (1-3) :281-285

[5]

Dieter George Ellwood, 1976, Mechanical metallurgy, V3

[6] Hot deformation behavior of AZ91 magnesium alloy in temperature ranging from 350 °C to 425 °C [J].

Ebrahimi, G. R. ;

Maldar, A. R. ;

Monajati, H. ;

Haghshenas, M. .

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2012, 22 (09) :2066-2071

[7] Multipass cold drawing of magnesium alloy minitubes for biodegradable vascular stents [J].

Fang, Gang ;

Ai, Wei-jiang ;

Leeflang, Sander ;

Duszczyk, Jurek ;

Zhou, Jie .

MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS, 2013, 33 (06) :3481-3488

[8]

Ge Q., 2013, ACTA BIOMATER, P1

[9]

Ge Q., 2012, MAT MANUF PROCESSES, V27

[10] Microstructural instability and strength of an AZ31 Mg alloy after severe plastic deformation [J].

Kim, HK ;

Kim, WJ .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 385 (1-2) :300-308

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