Table 4.

Results from variable amplitude load testing.

Specimen	Endurance limit	Damage accumulated	Fracture type
1	23,016	0.361	Ductile/brittle
2	10,916	0.171	Ductile/brittle
3	2110	0.033	Ductile/brittle
4	1006	0.016	Brittle
5	36,275	0.569	Ductile/brittle
6	61,556	0.965	Ductile