镍基单晶高温合金的反相畴界强化  

Misfit and Antiphase Boundary Strengthenings of a Single Crystal Nickel Base Suporalloy

作　　者：张静华[1] 张志亚[1] 李英敖[1] 管恒荣[1] 胡壮麒[1] 

机构地区：[1]中国科学院金属研究所

出　　处：《材料工程》1995年第6期7-9,共3页Journal of Materials Engineering

摘　　要：本项研究表明，在一种抗热腐蚀ＤＤ８单晶高温合金中，观察到反相畴界存在三种形成机制：一种是γ＇相内局部有序化原子产生错排；第二种是基体１／２＜１１０＞位错切入γ＇相；第三种是基体位错网诱发。经推导得到如下反相畴界能对单晶合金强度贡献的表达式：he antiphase boundaries(APS)formed in the ordered γ'phases is a dominant strengthen mode.There are three typos of mechanisms for formation of the antiphase beundary to be found in the alloy:One is the nismatch arrangement for the order atoms in a leeal area,the second is dislorations with 1/2<110> cut into the γ'phases,the last one is induction by the disloration network in the matrix. Thecontribution of the aniphase boundary energy to the strength of the alloy is given by:where τ is the resistance force to deformation provided by the APB energy, S the long-range ordered de-grees,Tc the transition temporature from the ordered to disordered structures in the γ'phase,f the vol-ume fraction of the γ' phase in the alloy,r_s the radiu of the γ' particles,G the shear medulus,K the propotional constant.

关 键 词：单晶高温合金 反相畴界 镍基合金 耐热合金 

分 类 号：TG132.32[一般工业技术—材料科学与工程]