• 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 >Effect of a Grain Size Gradient on the Profile and the Propagation of Short Surface Cracks in Titanium Grade 2
【24h】

Effect of a Grain Size Gradient on the Profile and the Propagation of Short Surface Cracks in Titanium Grade 2

机译：晶粒度梯度对2级钛合金轮廓和短表面裂纹扩展的影响

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

Titanium Grade 2 was used to study the influence of grain size gradients on the shape of short cracks originating from the sample surface. Round bars with a deformation gradient were used to produce microstructures with increasing and decreasing grain sizes in radial direction by suitable recrystallisation treatments. It is shown that the shape of an elliptical surface crack in a graded material depends strongly on the grain size distribution along the crack front. The ratio of the crack axes (depth/width) changes therefore during crack growth. Thus crack shape differs significantly from that in a homogeneous microstructure where the crack proceeds with a constant ellipticity. In order to avoid errors in the estimation of fatigue life times this change must be taken in consideration for the calculation of the crack propagation rates da/dN and for the cyclic stress intensity factor ΔK.
机译：钛2级用于研究晶粒度梯度对源自样品表面的短裂纹形状的影响。通过适当的重结晶处理，使用具有变形梯度的圆棒来生产沿径向增加和减小晶粒尺寸的微结构。结果表明，梯度材料中的椭圆形表面裂纹的形状在很大程度上取决于沿裂纹前沿的晶粒尺寸分布。因此，在裂纹扩展期间，裂纹轴的比率（深度/宽度）会发生变化。因此，裂纹的形状与均质的显微组织中的裂纹形状以恒定的椭圆率明显不同。为了避免疲劳寿命估算中的误差，在计算裂纹扩展速率da / dN和循环应力强度因子ΔK时必须考虑这一变化。

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