Effects of Zn powder on alloying during friction surfacing of Al-Mg alloy

被引：25
|
作者：
Bararpour, Seyedeh Marjan [1 ]
Aval, Hamed Jamshidi [1 ]
Jamaati, Roohollah [1 ]
机构：
[1] Babol Noshirvani Univ Technol, Dept Mat Engn, Shariati Ave, Babol Sar 4714871167, Iran
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 818卷
关键词：
Friction surfacing; Al-Mg alloy; Zinc powder; Microstructural characterization; Mechanical properties; MICROSTRUCTURE; ALUMINUM;
D O I：
10.1016/j.jallcom.2019.152823
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The present study investigated the effect of zinc powder on the microstructure and mechanical properties of Al-Mg alloy friction surfaced on an AA5052 aluminum alloy substrate. The zinc powder was applied to the coating through insertion of the hole in the Al-Mg aluminum alloy consumable rod. The addition of Zn powder greatly increases the thermal stability of the coating and reduces kinetic of grain growth. Considering a linear approximation between the grain size and the heat treatment time, the grain growth rate in the coating containing Zn and Zn free is approximately 0.55 mu m/h and 1.46 mu m/h, respectively. Based on the XRD results in pre heat treatment condition of sample containing Zn powder, in addition to the iron-rich particles and Mg2Si, the MgZn and Mg7Zn3 particles formed. The longtime solid solution and aging treatment result in the AlMg4Zn11 precipitates in the coted sample. After 8 h heat treatment, the coating hardness reaches 70.14 BHN, which shows an increase of 14% as compared to before heat treatment. (C) 2019 Elsevier B.V. All rights reserved.
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页数：8
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