The Effect of Texture on the Corrosion Behavior of AZ31 Mg Alloy
The Effect of Texture on the Corrosion Behavior of AZ31 Mg Alloy
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DOI：
10.1007/s11837-012-0341-1
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发表时间：
2012-06
期刊：
影响因子：
2.6
通讯作者：
G. Song
中科院分区：
文献类型：
--
作者：
G. Song
镁（Mg）晶粒表现出各向异性的腐蚀行为，这意味着单相热轧镁合金AZ 31板材如果具有高度织构，将根据晶粒的结晶取向而具有不同的腐蚀性能。它的滚动表面主要由（0001）基面组成，比其横截面主要由和棱柱面组成的表面更耐腐蚀。热轧细化晶粒有利于合金中AlMn（Fe）金属间化合物的溶解，提高合金的耐蚀性。表面压缩变形加工可以细化AZ31镁合金的晶粒，并产生预期的晶粒择优取向，从而提高AZ31镁合金的耐腐蚀性能。
Magnesium (Mg) grains show anisotropic corrosion behavior, which implies that the single-phase, hot-rolled Mg alloy AZ31 sheet, if highly textured, will have different corrosion performance depending on its crystallographic orientation of the grains. Its rolling surface, dominated by (0001) basal crystallographic planes, is more corrosion resistant than its cross-section surface, which is mainly composed ofandprismatic crystallographic planes. Furthermore, grain refinement by hot rolling is beneficial to the overall corrosion resistance of AZ31 because of the dissolution of AlMn(Fe) intermetallic precipitates in the alloy. Surface compressive deformation machining can lead to refined grains and an expected preferred grain orientation, thus improving the corrosion resistance of AZ31 alloy.