Exceptional superplasticity in an AZ61 magnesium alloy processed by extrusion and ECAP
Exceptional superplasticity in an AZ61 magnesium alloy processed by extrusion and ECAP
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DOI：
10.1016/j.msea.2006.01.043
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发表时间：
2006-03
期刊：
影响因子：
6.4
通讯作者：
Y. Miyahara;Z. Horita;T. Langdon
中科院分区：
文献类型：
--
作者：
Y. Miyahara;Z. Horita;T. Langdon
Experiments were conducted on a commercial AZ61 alloy to evaluate the potential for achieving an ultrafine grain size and superplastic ductilities through the use of the EX-ECAP two-step processing procedure of extrusion plus equal-channel angular pressing. The results show that EX-ECAP gives excellent grain refinement with grain sizes of ∼0.6 and ∼1.3μm after pressing at 473 and 523K, respectively. The alloy processed by EX-ECAP exhibits exceptional superplastic properties including a maximum elongation of 1320% after pressing through four passes when testing at 473K with an initial strain rate of 3.3×10−4s−1. This result compares with an elongation of ∼70% achieved in the extruded condition without ECAP under similar testing conditions.
