Fatigue Properties of Stainless Steel Lap Joints: Spot-Welded, Adhesive-Bonded, Weld-Bonded, Laser-Welded and Clinched Joints of Stainless Steel Sheets - A Review of Their Fatigue Properties

摘要

The type of joints covered are i) spot-welded stainless to stainless and to galvanized carbon steel, ii) adhesive-bonded stainless to stainless, iii) weld-bonded stainless to stainless, iv) laser-welded stainless to stainless and to galvanized carbon steel, v) clinched stainless to stainless steel. The materials studied are AISI 301 and 304 stainless steel and high- strength duplex 2101, 2304, 2205 and 2507 stainless steel. The thickness range is 0.7 - 4 mm. Fatigue properties in terms of Wohler curves and Fatigue strength at 2*10{sup}6 cycles are compared between the different joining methods using load transfer capacity per unit length of the joints. Fatigue strength is shown to be independent of matrix strength for spot-welded joints. Spot-welded, laser-welded and clinched joints show similar fatigue properties for 1 mm sheet joints. Adhesive-bonded joints are five-fold stronger and the weld-bonded joints show considerable scatter with a lower bound fatigue strength between spot-welded and adhesive-bonded joints.