Relationships among the Microstructure, Mechanical Properties, and Fatigue Behavior in Thin Ti6Al4V

Table 2

Summary of the study showing absolute values and variance (%) of properties of AR materials.

Microstructure	0.2% proof stress		Elongation		Fatigue strength
	(MPa)	(%)	(%)	(%)	(MPa)	(%)
As-received; (equiaxed grain size = 15–20 m)	978	0	13.6	0	180	0
Bimodal (950A); (equiaxed grain size = 15–20 m + lamellar width of 2–4 m)	1017	4.00	11.8	−13.6	158	−12.2
Widmanstätten (1050A); (lamellar width of 10 m + >400 m α grain boundary)	1041	6.42	10.3	−24.4	153	−15
Martensite (1050Q); (200 m grain size with inside acicular )	1114	13.8	7.8	−42.7	135	−25