摘要
应用固体与分子经验电子理论计算了Ｔｉ３Ａｌ及加入Ｎｂ后各相的价电子结构，并从均匀变形因子α、解理能Ｇｃ及位错行为等方面分析了Ｎｂ对Ｔｉ３Ａｌ脆性的影响。结果表明，Ｎｂ使α２相部分无序化，产生新的韧性相，提高了Ｔｉ３Ａｌ合金的α和Ｇｃ值；同时Ｎｂ也减弱了ＴｉＴｉ共价键，增加了基面滑移，从而综合导致Ｔｉ３Ａｌ脆性有本质改善。
According to the E E T, the valence electron structures of the various phases in Ti Al Nb alloys
are calculated. Effect of Nb on embrittlement of Ti 3Al is analysed in view of uniform deforming
factor α, cleave enery G c and dislocation movement. Analysis shows that Nb makes α
2 partly disordered and novel phase toughened, and then α and G c bigger. Ti Ti bond
weakened and dislocation slip increased in basis plane. As a result, embrittlement of Ti 3Al
alloyed with Nb is naturally improved.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
1999年第2期101-104,共4页
Journal of Mechanical Engineering
基金
吉林省科技计划资助
