Dry sliding wear behavior of an extruded Mg-Dy-Zn alloy with long period stacking ordered phase

被引：19

作者：

Bi, Guangli ^{[1
]}

Li, Yuandong ^{[1
]}

Huang, Xiaofeng ^{[1
]}

Chen, Tijun ^{[1
]}

Ma, Ying ^{[1
]}

Hao, Yuan ^{[1
]}

机构：

[1] Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China

来源：

JOURNAL OF MAGNESIUM AND ALLOYS | 2015年 / 3卷 / 01期

关键词：

Mg-Dy-Zn alloy; Coefficient of friction; Wear rate; Wear mechanism;

D O I：

10.1016/j.jma.2014.12.006

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The dry sliding wear behavior of extruded Mg-2Dy-0.5Zn alloy (at.%) was investigated using a pin-on-disk configuration. The friction coefficient and wear rate were measured within a load range 20-760 N at a sliding velocity of 0.785 m/s. Microstructure and wear surface of alloy were examined using scanning electron microscopy. The mechanical properties of alloy were tested at room and elevated temperatures. Five wear mechanisms, namely abrasion, oxidation, delamination, thermal softening and melting dominated the whole wear behavior with increasing applied load. The extruded Mg-2Dy-0.5Zn alloy exhibited the better wear resistance as compared with as-cast Mg97Zn1Y2 alloy under the given conditions through contact surface temperature analysis. The improved wear resistance was mainly related to fine grain size, good thermal stability of long period stacking order (LPSO) phase and excellent higher-temperature mechanical properties. Copyright 2015, National Engineering Research Center for Magnesium Alloys of China, Chongqing University. Production and hosting by Elsevier B.V. All rights reserved.

引用

页码：63 / 69

页数：7

共 33 条

[1] Long-period ordered structure in a high-strength nanocrystalline Mg-1 at% Zn-2 at% Y alloy studied by atomic-resolution Z-contrast STEM [J].