Effect of Laser Beam Welding on the Cyclic Material Behavior of the Press-hardened Martensitic Chromium Steel X46Cr13

摘要: Abstract For the application of high-strength materials in welded joints, a point principle is how strength sheet metal affected by cyclic loading and welding. investigation material behavior press-hardened martensitic chromium steel X46Cr13, strain-controlled fatigue tests were performed evaluated. The aim compensating limitations weldability this achieved reduced heat input laser beam welding defined treatment. effect on properties shown butt joints. basis strain-based assessment approaches. Both stress-strain curves strain-life are used for life estimation. No clear difference between base joints has been found curves. Transient effects comparison hysteresis loops initial loading, at cyclically stabilized state crack initiation. Cyclic hardening concluded from state. By curves, number cycles to initiation found. Cycles tested under strain control result over 50 % material’s 1·106 failure.