Prediction of Fatigue Life of Welded Joints Made of Fine-Grained Martensite-Bainitic S960QL Steel and Determination of Crack Origins

Table 4

Results of fatigue tests for welded joints of S960QL steel.

Load εa (%)	Joint type	εapl (%)	εael (%)	Nf (cycles)	σa (MPa)
0.15	I	0.0027	0.1473	6858	306
	I	0.0013	0.1487	5195	309
	V	0.0012	0.1488	13851	290
	V	0.0012	0.1488	7036	311
0.20	I	0.0029	0.1971	3160	413
	I	0.0025	0.1975	2444	421
	V	0.0015	0.1985	1892	445
	V	0.0020	0.1980	1755	400
0.25	I	0.0026	0.2474	1298	536
	I	0.0025	0.2475	914	545
	I	0.0063	0.2437	1610	534
	V	0.0020	0.2480	1095	534
	V	0.0040	0.2460	1418	478
0.30	I	0.0087	0.2913	772	604
	I	0.0088	0.2912	969	610
	V	0.0074	0.2926	553	652
	V	0.0085	0.2915	699	624
0.40	I	0.0323	0.3677	268	740
	V	0.0425	0.3575	178	788
	V	0.0330	0.3670	274	713