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首页> 外文会议>International Symposium on Superalloys >CHARACTERIZATION OF TILT AND TWIST LOW ANGLE GRAIN BOUNDARIES AND THEIR EFFECTS ON INTERMEDIATE-TEMPERATURE CREEP DEFORMATION BEHAVIOUR
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CHARACTERIZATION OF TILT AND TWIST LOW ANGLE GRAIN BOUNDARIES AND THEIR EFFECTS ON INTERMEDIATE-TEMPERATURE CREEP DEFORMATION BEHAVIOUR

机译：倾斜表征倾斜和扭曲低角度晶界及其对中温蠕变变形行为的影响

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The characterization of tilt and twist low angle grain boundaries (LAGBs) has been performed, and the influences of LAGBs on intermediate-temperature creep deformation behavior have been investigated in a single crystal Ni-based superalloy. It is found that the tilt boundary is composed of intrinsic edge dislocations, and the twist boundary mainly consists of intrinsic screw dislocations. LAGB type is found to have a significant influence on the rupture life of SX superalloy deformed at 760°C. The tilt boundary shows a much better creep resistance compared to that of a twist boundary. The dislocation configuration near the grain boundary indicates that most of the mobile dislocations can pass through the tilt boundary, but they are basically inhibited and piled-up at the twist boundary during creep deformation.
机译：已经进行了倾斜和扭曲低角度晶界（LAGBS）的表征，并且在单晶Ni基超合金中研究了滞后对中间温度蠕变变形行为的影响。发现倾斜边界由内在边缘位错组成，并且扭曲边界主要由固有螺杆脱位组成。发现LAGB类型对760℃下变形的Sx超合金的破裂寿命具有显着影响。与扭曲边界相比，倾斜边界显示出更好的蠕变电阻。晶界附近的位错配置表明，大多数移动脱位可以穿过倾斜边界，而是在蠕变变形期间基本上被抑制和堆积在扭曲边界。

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