Corrosion of Ultrafine Grained Materials by Severe Plastic Deformation, an Overview
Corrosion of Ultrafine Grained Materials by Severe Plastic Deformation, an Overview
复制标题
DOI：
10.2320/matertrans.m2015452
复制
发表时间：
2016-05-01
影响因子：
1.2
通讯作者：
Miyamoto, Hiroyuki
中科院分区：
文献类型：
--
作者：
Miyamoto, Hiroyuki
根据现有文献和材料的微观结构变化，综述了超细晶材料在剧烈塑性变形（SPD）作用下的腐蚀行为。幸运的是，通过对文献的全面调查，SPD的晶粒细化在增强机械性能的同时，似乎不会损害整体耐腐蚀性，并且在许多情况下，与粗晶对应物相比，它有所改善，尽管存在一些矛盾的结果在相同的材料和相同的环境中。UFG形成对腐蚀的影响程度在不锈钢中最高，其次是铝和镁合金，而在纯铜和钛中相对较小。SPD形成的UFG对腐蚀的影响不仅是由晶粒细化引起的，而且也是由SPD中通常发生的其他微观结构变化引起的，并且对于每个特定的SPD方法是独特的。在这篇评论中，特别注意的是前一种情况下，这包括洗牌或重新分配的化学不均匀性到一个更精细的尺度，变形引起的晶界和高内应力来自这些晶界。关于UFG材料应力腐蚀开裂（SCC）的文献绝对不足以发现总体趋势，有待更多研究。
Corrosion of ultrafine grain (UFG) materials by severe plastic deformation (SPD) is reviewed in light of the existing literature and micro structural change. Fortunately, by holistic survey of the literature, it seems likely that grain refinement by SPD, while enhancing mechanical properties, does not compromise the overall corrosion resistance, and in many case, improve it in comparison with coarse-grained counterparts, although there are some contradictory results within the same materials and same environment. The degree of impact of UFG formation on corrosion is highest in stainless steels followed by aluminum and magnesium alloys whereas it is relatively marginal in pure copper and titanium. The effect of UFG formation by SPD on corrosion is imparted by not only grain refinement, but also other microstructural change occurring commonly in SPD in general and unique to each specific SPD method. In this review, an attention is paid specifically to the former case, and this includes shuffling or redistribution of chemical inhomogeneity into a finer scale, deformation-induced grain boundaries and high internal stress stemming from these grain boundaries. The literature on stress corrosion cracking (SCC) of UFG materials are definitely insufficient to find the general trends, more studies are waited.