公开(公告)号：US10023977B2

公开(公告)日：2018-07-17

申请号：US14428538

申请日：2013-09-17

申请人： Xinghang Zhang ,  Daniel Bufford ,  Haiyan Wang ,  Yue Liu

发明人： Xinghang Zhang ,  Daniel Bufford ,  Haiyan Wang ,  Yue Liu

IPC分类号： C30B29/68 ,  C30B29/02

摘要： Materials, including metals such as bulk metals, specialty alloys, metallic films and coatings, are made up of many tiny single crystals, which may also be referred to as grains. The boundaries between crystals are called grain boundaries and govern properties such as mechanical strength, deformation, and electrical resistivity. These properties are affected by not only the number of grain boundaries formed, but also the density and orientation of those grain boundaries. Twin boundaries are a special type of grain boundary which have symmetrical “mirror image” structures and preserve favorable qualities of grain boundaries while suppressing unfavorable properties such as the initiation of cracks, inclusions, and other unwanted flaws. Some metals and alloys form twins more easily than others during processing. Metals with low stacking fault energy (SFE) such as austenitic stainless steel, copper (Cu), and silver (Ag) form twin boundaries more easily than metals with high SFE such as Magnesium (Mg) and Aluminum (Al).

公开(公告)号：US20150233019A1

公开(公告)日：2015-08-20

申请号：US14428538

申请日：2013-09-17

申请人： Xinghang ZHANG ,  Daniel BUFFORD ,  Haiyon WANG ,  Yue LIU

发明人： Xinghang Zhang ,  Daniel Bufford ,  Haiyan Wang ,  Yue Liu

IPC分类号： C30B29/68 ,  C30B29/02

CPC分类号： C30B29/68 ,  C23C14/165 ,  C30B23/025 ,  C30B29/02 ,  Y10T428/12472

摘要： Materials, including metals such as bulk metals, specialty alloys, metallic films and coatings, are made up of many tiny single crystals, which may also be referred to as grains. The boundaries between crystals are called grain boundaries and govern properties such as mechanical strength, deformation, and electrical resistivity. These properties are affected by not only the number of grain boundaries formed, but also the density and orientation of those grain boundaries. Twin boundaries are a special type of grain boundary which have symmetrical “mirror image” structures and preserve favorable qualities of grain boundaries while suppressing unfavorable properties such as the initiation of cracks, inclusions, and other unwanted flaws. Some metals and alloys form twins more easily than others during processing. Metals with low stacking fault energy (SFE) such as austenitic stainless steel, copper (Cu), and silver (Ag) form twin boundaries more easily than metals with high SFE such as Magnesium (Mg) and Aluminum (Al).

摘要翻译： 包括诸如散装金属，特种合金，金属膜和涂层的金属的材料由许多微小的单晶组成，其也可以称为晶粒。 晶体之间的边界称为晶界和管理性质，如机械强度，变形和电阻率。 这些性质不仅受到形成的晶粒数量的影响，还受到这些晶界的密度和取向的影响。 双边界是具有对称“镜像”结构的特殊类型的晶界，并且在抑制裂纹，夹杂物等不希望的缺陷的不利特性的同时保持晶界的有利品质。 一些金属和合金在加工过程中比其他金属和合金更容易形成双胞胎。 具有低堆垛层错能量（SFE）的金属如奥氏体不锈钢，铜（Cu）和银（Ag）比具有高SFE的金属如镁（Mg）和铝（Al）更容易形成双边界。