High Temperature Wear Behavior of Mg97Zn1Y2 Magnesium Alloy

doi:10.3901/JME.2019.24.066

Abstract

Abstract: There exists detailed investigation on wear behaviour of Mg97Zn1Y2 alloy at room temperature, while its wear behaviour at elevated temperatures is absent. It is of interest to study the wear behaviour of the alloy at elevated temperatures. The wear tests of Mg97Zn1Y2 alloy are carried out on MG-2000 pin-disk wear tester. The test temperature range is 20-200℃ and the loading range is 20-320N. The effects of different temperatures and loads on the wear behavior of Mg97Zn1Y2 alloy are investigated. The wear rate curves at different temperatures are plotted according to the test data. The wear surface morphologies are observed by SEM, and the chemical compositions of the wear surfaces are analyzed by EDS to identify the wear mechanisms. The results show that the wear rate of Mg97Zn1Y2 alloy increases with the increase of temperature. The wear behavior can be divided into two stages:mild wear and severe wear. The wear mechanisms at mild wear stage are abrasion, oxidative wear, delamination, while the wear mechanisms at severe wear stage are severe plastic deformation and surface melting. A wear mechanism transition map is drawn to indicate the safe operating region of the alloy, which can provides useful reference for tribologial applications of the alloy at elevated temperature.

Key words: magnesium alloy, high temperature wear, wear mechanism, wear transition diagram

CLC Number:

TH117

FENG Changqing, ZHAO Wei, SUN Yuan, AN Jian. High Temperature Wear Behavior of Mg97Zn1Y2 Magnesium Alloy[J]. Journal of Mechanical Engineering, 2019, 55(24): 66-71.

References

[1] ALIZADEH R, MAHMUDI R, NGAN A H W, et al. Microstructural stability and grain growth kinetics in an extruded fine-grained Mg-Gd-Y-Zr alloy[J]. Journal of Materials Science, 2015, 50(14):4940-4951.
[2] 陈振华. 耐热镁合金[M]. 北京:化学工业出版社, 2006. CHEN Zhenhua. Heat-resistant magnesium alloy[M]. Beijing:Chemical Industry Press, 2006.
[3] REGEV M, AGHION E, ROSEN A. Creep studies of AZ91D pressure die casting[J]. Materials Science & Engineering A, 1997, 234(97):123-126.
[4] KOJIMA Y. Platform science and technology for advanced magnesium alloys[J]. Materials Transactions, 2001, 42(7):1154-1159.
[5] LI R G, ZHANG H J, FU G Y. Microstructure and mechanical properties of extruded Mg96Zn1Y3 alloy[J]. Materials Characterization, 2014, 98:107-112.
[6] MINE Y, YOSHIMURA H, MATSUDA M, et al. Microfracture behaviour of extruded Mg-Zn-Y alloys containing long-period stacking ordered structure at room and elevated temperatures[J]. Materials Science & Engineering A, 2013, 570(19):63-69.
[7] ARCHARD J F, HIRST W. The wear of metals under unlubricated conditions[J]. Proceedings of the Royal Society of London. Series A, 1956, 236(1206):397-410.
[8] FAROKHZADEH K, EDRISY A. Transition between mild and severe wear in titanium alloys[J]. Tribology International, 2016, 94:98-111.
[9] CHEN H, ALPAS A T. Sliding wear map for the magnesium alloy Mg-9Al-0.9Zn (AZ91)[J]. Wear, 2000, 246:106-116.
[10] AN J, XUAN X H, ZHAO J, et al. Dry sliding wear behavior and subsurface microstructure evolution of Mg97Zn1Y2 alloy in a wide sliding speed range[J]. Journal of Materials Engineering and Performance, 2016, 25(12):5363-5373.
[11] LIANG C, LI C, AN J, et al. Correlation between frictioninduced microstructural evolution, strain hardening in subsurface and tribological properties of AZ31 magnesium alloy[J]. Wear, 2014, 312:29-39.
[12] EL-MORSY A W. Dry sliding wear behavior of hot deformed magnesium AZ61 alloy as influenced by the sliding conditions[J]. Material Science and Engineering:A, 2008, 473:330-335.
[13] TALTAVULL C, RODRIGO P, TORRES B, et al. Dry sliding wear behavior of AM50B magnesium alloy[J], Materials and Design, 2014, 56:549-556.
[14] SELVAN S A, RAMANATHAN S. Dry sliding wear behavior of hot extruded ZE41A magnesium alloy[J]. Material Science and Engineering:A, 2010, 527(7-8):1815-1820.
[15] 安冬琪,肖宏伟,李东成,等. AZ系镁合金的轻微-严重磨损转变研究[J]. 机械工程学报, 2016, 52(6):79-85. AN Dongqi, XIAO Hongwei, LI Dongcheng, et al. Investigation on the mild to severe wear transition for AZ system magnesium alloys[J]. Journal of Mechanical Engineering, 2016, 52(6):79-85.
[16] 张翼祥,闫晓晗,王渊博. Mg-3Al-0.4Si镁合金的高温磨损行为研究[J]. 摩擦学学报, 2017, 37(6):831-837. ZHANG Yixiang, YAN Xiaohan, WANG Yuanbo. Study on high temperature wear behavior of Mg-3Al-0.4Si magnesium alloy[J]. Tribology, 2017, 37(6):831-837.