A new fatigue test specimen configuration has been developed which allows testing of spot welded joints in a fully reversed axial fatigue mode in a life range from 5 × l03 to 1 × 107 cycles. The specimen, a unique square concentric tube arrangement, tests four spot welds simultaneously. The materials tested in this program included three dual-phase steels, an SAE 940X grade, SAE 1020 steel and a cold rolled, low carbon steel - SAE 1006AK for purposes of comparison. The general results indicate the superiority of the dual-phase steels in the low life region with all steels showing equivalent behavior beyond 5 × 105 cycles. Additionally, beneficial effects of increased steel thickness and increased nugget diameter were observed.
Fatigue Behavior of Spot Welded High Strength Steel Joints
Sae Technical Papers
SAE International Congress and Exposition ; 1981
1981-02-01
Aufsatz (Konferenz)
Englisch
Fatigue behavior of spot welded high strength steel joints
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