To improve strength and bio-corrosion resistance of Mg-4Zn alloy via high strain rate rolling combined with double aging

To improve strength and bio-corrosion resistance of Mg-4Zn alloy via high strain rate rolling combined with double aging
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高应变率轧制结合二次时效提高Mg-4Zn合金的强度和耐生物腐蚀性能

DOI:
10.1016/j.matlet.2018.05.112
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发表时间:
2018-09
期刊:
影响因子:
3
通讯作者:
Zhu Weijun
Zhu Weijun
中科院分区:
材料科学3区
文献类型:
--
作者:
Zhou Bo;Chen Jihua;Yan Hongge;Xia Weijun;Su Bin;Guo Hui;Zhu Weijun

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采用高应变速率轧制(HSRR)和人工时效工艺对Mg-4 Zn合金进行晶粒细化和析出相细化,以提高Mg-4 Zn合金的力学性能和抗生物腐蚀性能。在单次和双次时效的四种状态中,欠时效状态的耐蚀性最好。经70 °C × 10 h + 160 °C × 2 h双重时效处理后,合金的抗生物腐蚀性能得到改善,这主要是由于应力消除、纳米尺度的G. P.区和β1′相的均匀分布。
High strain rate rolling (HSRR) and artificial aging are conducted to improve mechanical properties and bio-corrosion resistance of Mg-4Zn alloy by modifying grain size and precipitates. The under-aged state is the most corrosion resistant among four states in single and double aging. Bio-corrosion resistance of the as-rolled alloy can be improved by double aging of 70 °C × 10 h + 160 °C × 2 h, resulting from stress relief and uniformly distributed nano-scale G.P. zones and β1′ precipitates.
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