Effects of Heat Treatment on Dry Wear Properties of AZ61 Magnesium Alloy

doi:10.12068/j.issn.1005-3026.2017.11.008

Journal of Northeastern University Natural Science ›› 2017, Vol. 38 ›› Issue (11): 1554-1558.DOI: 10.12068/j.issn.1005-3026.2017.11.008

• Materials & Metallurgy • Previous Articles Next Articles

Effects of Heat Treatment on Dry Wear Properties of AZ61 Magnesium Alloy

CHEN Qing-qiang^1,2， LIU Yu-yang^1,2， ZHAO Zhi-hao²， ZHU Qing-feng^1,2

1. Key Laboratory of Electromagnetic Processing of Materials， Ministry of Education， Northeastern University， Shenyang 110819， China; 2. School of Materials Science & Engineering， Northeastern University， Shenyang 110819， China.

Received:2016-11-02 Revised:2016-11-02 Online:2017-11-15 Published:2017-11-13
Contact: ZHAO Zhi-hao
About author:-
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Abstract

Abstract: The effects of solution treatment and the aging time of its succeeding aging process on dry wear property of AZ61 magnesium alloys were investigated by using a pin-on-disc apparatus. Wearing rate and friction coefficient were measured under the load of 100 N， sliding speed of 0.78m/s and sliding distance of 1km. The results showed that the coarsen β-phases (Mg₁₇Al₁₂) were dissolved after solution treatment， resulted in the decrease of the hardness of the alloy. The friction coefficient and wearing rate of the alloy increased significantly after solution treatment. Moreover， the AZ61 alloy exhibited a better wear resistance after aging at the temperature of 170℃ with an aging time ranging from 0 to 80h， owing to precipitate large amount of the fine Mg₁₇Al₁₂ phases distributed in the α-Mg matrix.The friction coefficient and wearing rate were the lowest when the aging time was about 20h.Three wearing mechanisms in AZ61 alloys were observed as follows: abrasion， oxidation and delamination.

Key words: heat treatment, AZ61 magnesium alloy, friction and wear, wear resistance, aging

CLC Number:

TG146.2⁺2

CHEN Qing-qiang， LIU Yu-yang， ZHAO Zhi-hao， ZHU Qing-feng. Effects of Heat Treatment on Dry Wear Properties of AZ61 Magnesium Alloy[J]. Journal of Northeastern University Natural Science, 2017, 38(11): 1554-1558.

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Effects of Heat Treatment on Dry Wear Properties of AZ61 Magnesium Alloy

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