摘要
基于余氏固体与分子经验电子理论(EET)和程氏改进的 TFD 理论提出了计算双相 TiAl 合金层片状结构α2/γ界面电子结构的计算模型与方法,计算了含常用合金元素的单相 TiAl 合金与双相 TiAl 合金中的异相界面的电子结构,利用界面电子结构给出的信息?界面结合因子ρ, ?ρ, σ,以合金元素 Mn 为例初步分析讨论了双相 TiAl 合金层片状结构增加韧性的微观机制。
The calculation model and method calculating the valence electron structures of biphase interface α2/γ of the lamellar structure in two-phase TiAl-alloy are advanced on the basis of the empirical electron theory of solids and molecules(EET) and the improved Thomas-Fermi-Dirac theory(TFD). The valence electron structures of biphase interface in single- and two-phase TiAl-alloys containing common alloying elements are calculated. Accordingly, taking the valence electron structure of biphase interface containing the alloying element Mn for example, the toughening mechanism of the lamellar structure in two-phase TiAl-alloy is discussed with valence electron structure parameters, i.e., interface conjunction factors ρ, ?ρ, σ.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2005年第2期199-204,共6页
Rare Metal Materials and Engineering
基金
国家自然科学基金项目资助(50271030)
关键词
双相TiAl合金
异相界面
电子结构
增韧机制
two-phase TiAl-alloy
biphase interface
electron structure
toughening mechanism
