论文部分内容阅读
利用Ｓｔｒｏｈ 位错塞积模型解释了Ｌ１２ 结构Ａｌ６７ Ｍｎ８Ｔｉ２５ 合金室温解理裂纹的萌生。计算表明，位错塞积优先在与滑移面成３５ ．３°方向诱发微裂纹， 导致解理断裂。经室温弯曲断口解理面取向的电子背散射衍射（ＥＢＳＤ） 测试结果验证表明，Ｌ１２ 结构Ａｌ６７ Ｍｎ８Ｔｉ２５ 合金室温解理断裂裂纹优先在｛１１０｝ 晶面萌生
The Stroh dislocation plugging model was used to explain the initiation of the cleavage crack at room temperature in Al67 Mn8Ti25 alloy with L12 structure. Calculations show that dislocations preferentially occupy 35 with the slip plane. 3 ° direction induced microcracks, leading to cleavage fracture. The results of the electron backscatter diffraction (EBSD) test show that the room temperature cleavage fracture of Al67Mn8Ti25 alloy preferentially occurs at the {110} crystal plane