Quantitative study on interactions between interfacial misfit dislocation networks and matrix dislocations in Ni-based single crystal superalloys
Quantitative study on interactions between interfacial misfit dislocation networks and matrix dislocations in Ni-based single crystal superalloys
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镍基单晶高温合金界面失配位错网络与基体位错相互作用的定量研究
DOI：
10.1016/j.camss.2017.07.004
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发表时间：
2017-08
影响因子：
2.2
通讯作者：
Huang Minsheng
中科院分区：
文献类型：
--
作者：
Xiong Jun;Zhu Yaxin;Li Zhenhuan;Huang Minsheng
The interactions between the moving dislocation within matrix channel and the interfacial misfit dislocation networks on the two-phase interfaces in Ni-based single crystal super-alloys are studied carefully via atomic modeling, with special focus on the factors influencing the critical bowing stress of moving dislocations in the matrix channel. The results show that the moving matrix dislocation type and its position with respect to the interfacial misfit dislocation segments have considerable influences on the interactions. If the moving matrix dislocation is pure screw, it reacts with the interfacial misfit dislocation segments toward dislocation linear energy reduction, which decreases the critical bowing stress of screw dislocation due to dislocation linear energy release during the dislocation reactions. If the moving matrix dislocation is of 60° -mixed type, it is obstructed by the interaction between the mixed matrix dislocations and the misfit interfacial dislocation segments. As a result, the critical bowing stress increases significantly because extra interactive energy needs to be overcome. These two different effects on the critical bowing stress become increasingly significant when the moving matrix dislocation is very close to the interfacial misfit dislocation segments. In addition, the matrix channel width also has a significant influence on the critical bowing stress, i.e. the narrower the matrix channel is, the higher the critical bowing stress is. The classical Orowan formula is modified to predict these effects on the critical bowing stress of moving matrix dislocation, which is in good agreement with the computational results.
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影响因子：
2.2
作者：
Jacques Luk-Cyr;D. Paquet;J. Lanteigne;H. Champliaud;Aurelian Vadean
通讯作者：
Jacques Luk-Cyr;D. Paquet;J. Lanteigne;H. Champliaud;Aurelian Vadean
影响因子：
1.6
作者：
Wenping Wu;Ya-Fang Guo;Yuesheng Wang
通讯作者：
Wenping Wu;Ya-Fang Guo;Yuesheng Wang
DOI：
10.1016/b978-008044019-4/50011-8
发表时间：
2002
期刊：
--
影响因子：
--
作者：
J. Christian
通讯作者：
J. Christian
DOI：
10.1016/0956-7151(92)90195-k
发表时间：
1992-01-01
期刊：
ACTA METALLURGICA ET MATERIALIA
影响因子：
--
作者：
POLLOCK, TM;ARGON, AS
通讯作者：
ARGON, AS
DOI：
10.1017/cbo9780511541285
发表时间：
2006-09
期刊：
--
影响因子：
--
作者：
R. Reed
通讯作者：
R. Reed