• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>World Conference on Titanium v.3; 20030713-20030718; Hamburg; DE >Effects of Alloying and Cold-Work on Anisotropic Biaxial Creep of Titanium Tubing
【24h】

Effects of Alloying and Cold-Work on Anisotropic Biaxial Creep of Titanium Tubing

机译：合金化和冷加工对钛管各向异性双轴蠕变的影响

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Effects of thermo-mechanical processing and alloying are investigated on anisotropic biaxial creep in cp-titanium. Crystallographic textures were characterized using pole figures from which the orientation distribution functions were derived. Biaxial creep characteristics were investigated on closed-end tubing samples by varying the stress ratio of the hoop to axial from 0 to 2 while the hoop and axial creep strains were monitored using a telemetric laser extensometer and an LVDT respectively. The creep locus defined at a constant energy dissipation rate deviated from isotropy. The results were fit to the modified Hill's equation from which the creep anisotropy parameters, R and P were obtained. Predictions based on crystal slip plasticity exhibited large deviations that were initially thought to arise from contributions from twinning and/or second phase. Electron microscopy of as recrystallized and deformed specimens revealed only small amounts of β phase. No twins were observed in any of the tested specimens apparently due to the relatively small grain sizes (<10 μm). To-date, detailed dislocation microstructures were investigated on recrystallized Ti3A12.5V tested under uniaxial and equi-biaxial loading conditions only. Depending on the stress-level and stress-state, either distinct subgrains or random distribution of dislocations are observed. In all cases, the dislocations are predominantly <11.0> type lying on {10.0} planes.
机译：研究了热机械加工和合金化对cp-钛各向异性双轴蠕变的影响。使用极图来表征晶体织构，由此得出取向分布函数。通过将环向轴的应力比从0更改为2来研究封闭端管道样品的双轴蠕变特性，同时分别使用遥测激光引伸计和LVDT监测环向和轴向蠕变应变。以恒定能量耗散率定义的蠕变轨迹偏离各向同性。结果符合修正的希尔氏方程，由此得出蠕变各向异性参数R和P。基于晶体滑移可塑性的预测显示出较大的偏差，最初被认为是由孪晶和/或第二相的贡献引起的。重结晶和变形样品的电子显微镜检查仅显示少量的β相。由于晶粒尺寸相对较小（<10μm），因此在任何一个试样中均未观察到孪晶。迄今为止，仅在单轴和等双轴加载条件下测试的重结晶Ti3A12.5V上研究了详细的位错微结构。根据应力水平和应力状态，观察到不同的亚晶粒或位错的随机分布。在所有情况下，位错主要是位于{10.0}平面上的<11.0>型。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号