MICROSTRUCTURE AND PROPERTIES OF METAMORPHIC LAYER FORMED ON Mg-RE ALLOY IN MICRO-EDM PROCESS

SUN Shufa; DI Shichun; LU Pengxiang; WEI Dongbo; YU Jie; GUO Yupeng

doi:10.3724/SP.J.1037.2012.00557

Acta Metall Sin >

2013 , Vol. 49 >Issue 2: 251 - 256

DOI: https://doi.org/10.3724/SP.J.1037.2012.00557

MICROSTRUCTURE AND PROPERTIES OF METAMORPHIC LAYER FORMED ON Mg-RE ALLOY IN MICRO-EDM PROCESS

SUN Shufa ,
DI Shichun ,
LU Pengxiang ,
WEI Dongbo ,
YU Jie ,
GUO Yupeng

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1) School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 15000
12) Institute of Engineering and Technology, Northeast Forestry University, Harbin 150040

Received date: 2012-09-21

Revised date: 2012-10-20

Online published: 2013-02-11

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Abstract

In this work, the Mg-RE alloy metamorphic layer was formed in the micro-EDM process in different process parameters. The morphology and composition of the metamorphic layer were detected by SEM and XPS, the hardness of the metamorphic layer was measured by a nanoindentor, the corrosion resistance property was investigated by using a potentiodynamic polarization test. The results show that there are microcracks on the surface of metamorphic layer, the microcracks can be reduced by decreasing processing voltage and current, and it can be further eliminated by increasing pulse wide and pulse interval. The oxidation caused on the surface of metamorphic layers in the micro-EDM process in three different dielectrics among which there was significantly electrochemical corrosion on the surface in deionized water. The hardness of metamorphic layer is enhanced compared to the substrate of Mg-RE alloy, and its maximum value is about 1.664 GPa. The potentiodynamic polarization test shows that the corrosion resistance of the Mg-RE alloy was improved significantly due to the existence of the metamorphic layer.

Key words： Mg-RE alloy; micro-EDM; metamorphic layer; hardness, corrosion

Cite this article

SUN Shufa , DI Shichun , LU Pengxiang , WEI Dongbo , YU Jie , GUO Yupeng . MICROSTRUCTURE AND PROPERTIES OF METAMORPHIC LAYER FORMED ON Mg-RE ALLOY IN MICRO-EDM PROCESS[J]. Acta Metall Sin, 2013 , 49(2) : 251 -256 . DOI: 10.3724/SP.J.1037.2012.00557

References

[1] Yao H B, Li Y, Wee A T S. Electrochim Acta, 2003; 48: 4197

[2] Chen H B, Yang B. Int J Min Met Mater, 2009; 16: 672

[3] Wang X B, Tian X B, Gong C Z, Yang S Q. J Inorg Mater, 2011; 26: 711

(王晓波, 田修波, 巩春志, 杨士勤. 无机材料学报, 2011; 26: 711)

[4] Ding W J, Zeng X Q. Acta Metall Sin, 2010; 46: 1450

(丁文江, 曾小勤. 金属学报, 2010; 46: 1450)

[5] Li H Z, Liu H T, Li F B, Wang H J, Liang X P, Liu C M. J Mater Eng Perform, 2012; 21: 1056

[6] Chang J W, Guo X W, He S M, Fu P H, Peng L M, Ding W J. Corros Sci, 2008; 50: 166

[7] Chang J W, Duo J, Xiang Y Z, Yang H Y, Ding W J, Peng Y H. Int J Min Met Mater, 2011; 18: 203

[8] Peng L M, Chang J W, Guo X W, Atrens A, Ding W J, Peng Y H. J Appl Electrochem, 2009; 39: 913

[9] Xu N J, Liu C S, Shang S, Wang Z Y. J Northeastern Univ (Nat Sci), 2012; 33: 1133

(许妮君, 刘常升, 商硕, 王政一. 东北大学学报(自然科学版), 2012; 33: 1133)

[10] Guckel H, Fischer K, Stiers E, Chaudhuri B, McNamara S, Ramotowski M, Johnson E D, Kirk C. Microsyst Technol, 1999; 6: 103

[11] Liu J C, Bai J C, Guo Y F. Non-Traditional Machining Technology.5th Ed., Beijing: China Machine Press, 2010: 7

(刘晋春, 白基成, 郭永丰. 特种加工. 第5版. 北京：机械工业出版社, 2010: 7)

[12] Osenbruggen C V. Philips Technish Tijdschrift, 1969; 20: 200

[13] Joo C P, Kim B H, Choi D K, Chu C N. J Mech Sci Technol, 2008; 22: 300

[14] Ghanem F, Braham C, Sidhom H. J Mater Process Technol, 2003; 142: 163

[15] Cho D H, Lee S A, Lee Y Z. Tribology Lett, 2012; 45: 123

[16] Ma G R, Xu Z J. Electromachining, 1984; 3: 5

(马光荣, 徐祯基. 电加工, 1984; 3: 5)

[17] Zhao W S. Advanced EDM Machining Technology. Beijing: National Defence Industry Press, 2003: 34

(赵万生. 先进电火花加工技术. 北京: 国防工业出版社, 2003: 34)

[18] Jahan M P, Wong Y S, Rahman M. J Mater Process Technol, 2009; 209: 1706

[19] Bouvier Y, Mutel B, Grimblot J. Surf Coat Technol, 2004; 18: 169

[20] Kumar S, Singh R, Singh T P, Sethi B L. J Mater Process Technol, 2009; 209: 3675

[21] Harcuba P, Bacakova L, Strasky J, Bacakova M, Novotna K, Janecek M. J Mech Behav Biomed Mater, 2012; 7: 96

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