Analysis and Research of the High-Cycle Fatigue Fracture Mode Based on Stress Ratio and Residual Stress of Ti-6Al-4V

Table 3

Statistics of unrelieved stress samples at different fatigue initiation positions.

Where it started to crack	Stress ratio
	−1.0	−0.6	−0.3	0.1	0.6
Surface	4	2	2	1	8
The internal part	0	6	4	11	0