Effects of microstructure and strain incompatibility on micro-crack generation

用电子或中子衍射技术和基于Taylor分析的模拟方法研究了α-钛合金、奥氏体钢和硅钢高周疲劳过程中的非均匀变形。提出了应变不相容在晶界附近产生亚表面裂纹的模型，这种不相容可能在试件内部形成具有裂纹张开应力的微结构裂纹和具有非均匀滑移的微裂纹扩展。

Heterogeneous deformation in high-cycle fatigue of a-titanium alloy, austenitic steel and silicon steel has been characterized with electron or neutron diffraction techniques as well as modeling based on Taylor analysis. Subsurface crack generation model due to strain incompatibility in the vicinity of grain boundaries was proposed; the incompatibility may form a microstructural cracking with crack opening stress and microcrack growth with heterogeneous slip in the specimen interior.