Particle effects on recrystallization in magnesium-manganese alloys: Particle pinning
Particle effects on recrystallization in magnesium-manganese alloys: Particle pinning
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DOI：
10.1016/j.msea.2011.02.030
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发表时间：
2011-05-15
期刊：
影响因子：
6.4
通讯作者：
Davis, B.
中科院分区：
文献类型：
--
作者：
Robson, J. D.;Henry, D. T.;Davis, B.
弥散相颗粒被广泛用于变形铝合金中以在热机械加工期间控制晶粒结构。本工作的目的是研究这种方法是否可以用于变形镁合金，以获得更好的再结晶控制。对一种二元镁锰合金进行热处理，以产生细小弥散的锰沉淀物。在通道模具变形（在一个缓慢的应变速率），热轧，和退火过程中的动态和静态再结晶的分散体的效果进行了研究和比较的合金的细颗粒。结果发现，颗粒的存在并不抑制动态再结晶过程中通道模具变形。细颗粒导致热轧后的再结晶分数大大减少，归因于静态再结晶动力学的延迟。虽然钉扎颗粒的存在大大减缓退火时的再结晶动力学，对于没有研究的条件是可能的，以防止再结晶的变形结构使用颗粒。(C)2011 Elsevier B.V.保留所有权利。
Dispersoid particles are widely used in wrought aluminium alloys to control grain structure during thermomechanical processing. The aim of this work was to investigate whether this approach could be utilized in wrought magnesium alloys to obtain bette" control of recrystallization. A binary magnesium-manganese alloy was heat treated to produce a fine dispersion of manganese precipitates. The effect of this dispersion on dynamic and static recrystallization during channel die deformation (at a slow strain rate), hot rolling, and annealing was studied and compared with that of an alloy free of fine particles. It was found that the presence of particles did not suppress dynamic recrystallization during channel die deformation. Fine particles did lead to a much reduced recrystallized fraction after hot rolling, attributed to a retardation of static recrystallization kinetics. Although the presence of pinning particles greatly slowed recrystallization kinetics on annealing, for no conditions studied was it possible to prevent recrystallization of the as-deformed structure using particles. (C) 2011 Elsevier B.V. All rights reserved.