The development of superplastic ductilities and microstructural homogeneity in a magnesium ZK60 alloy processed by ECAP
The development of superplastic ductilities and microstructural homogeneity in a magnesium ZK60 alloy processed by ECAP
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DOI：
10.1016/j.msea.2006.05.056
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发表时间：
2006-08
期刊：
影响因子：
6.4
通讯作者：
R. Figueiredo;T. Langdon
中科院分区：
文献类型：
--
作者：
R. Figueiredo;T. Langdon
采用等径角挤压（ECAP）工艺对挤压后的ZK60镁合金进行了高温拉伸试验。结果表明，该合金在473K的测试温度下具有超塑性，当初始应变速率为2.0×10−4s−1时，其最佳延展性为~ 1310%。结果表明：在中等应变速率下，合金的超塑性达到最佳状态；在较快应变速率和较慢应变速率下，合金的失效延伸率均有所降低；经ECAP处理后，分别在横截面和轴向进行显微硬度测量。这些测量表明合金在压制状态下基本上是均匀的。
An extruded ZK60 magnesium alloy was processed by equal-channel angular pressing (ECAP) and then tested in tension at elevated temperatures. The results show the alloy is superplastic at a testing temperature of 473K with an optimum ductility of ∼1310% when using an initial strain rate of 2.0×10−4s−1. The results demonstrate that optimum superplasticity is achieved at intermediate strain rates and there are decreases in the elongations to failure at both faster and slower strain rates. Microhardness measurements were taken both on the cross-sectional plane and along the axial direction after processing by ECAP. These measurements show the alloy is essentially homogeneous in the as-pressed condition.