Improving the mechanical properties of magnesium and a magnesium alloy through severe plastic deformation
Improving the mechanical properties of magnesium and a magnesium alloy through severe plastic deformation
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通过剧烈塑性变形改善镁及镁合金的力学性能
DOI：
10.1016/s0921-5093(00)01660-9
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发表时间：
2001-02-28
期刊：
影响因子：
6.4
通讯作者：
Langdon, TG
中科院分区：
文献类型：
--
作者：
Yamashita, A;Horita, Z;Langdon, TG
纯镁和镁合金在常温下通常只表现出有限的延展性。采用等通道转角挤压(ECAP)工艺对纯镁和镁-0.9%Al合金进行了大塑性变形，评价了改善这些材料室温力学性能的可能性。结果表明，ECAP在高温下可以成功地应用于这些材料，并由于在挤压过程中发生再结晶而导致晶粒细化，从而显著提高了这些材料的强度和塑性。由于这些改进只在一次通过ECAP模具后就很明显，因此可以得出结论，ECAP的引入为改善材料(如HCP金属)的常温力学性能提供了一种简单而有效的方法，在这些材料中，测量的延展性通常是有限的。(C)2001 Elsevier Science B.V.保留所有权利。
Pure Mg and Mg alloys generally exhibit only limited ductilities at ambient temperatures. Experiments were conducted to evaluate the potential for improving the mechanical properties of pure Mg and an Mg-0.9% Al alloy at room temperature by subjecting these materials to severe plastic deformation through the procedure of equal-channel angular pressing (ECAP). It is shown that ECAP may be applied successfully to these materials at elevated temperatures and this leads to grain refinement due to the occurrence of recrystallization during the pressing process and to significant improvements in the strength and ductility of these materials. Since these improvements are apparent after only a single pass through the ECAP die, it is concluded that the introduction of ECAP provides a simple and effective procedure for improving the ambient temperature mechanical properties of materials, such as hcp metals, where the measured ductilities are generally limited. (C) 2001 Elsevier Science B.V. All rights reserved.