Prediction of Fatigue Life for Light Metals and their Welded Metals

Masatoshi Enomoto

doi:10.4028/www.scientific.net/MSF.794-796.273

Paper Titles

Effect of Alloying Elements on the Colour Development of Anodised Al-Mg-Si Alloys
p.247

Effect of Stabilizing Treatment on the Intergranular Corrosion Behavior of High Strength Al-Mg Alloys
p.253

Aging Process during Creep Deformation in an Al-Mg-Si Alloy Affected by Pre-Aging Condition
p.261

Effect of Heat Treatment and Alloying Element on Impact Energy Absorption of AlSi10 Casting Alloys
p.267

Prediction of Fatigue Life for Light Metals and their Welded Metals
p.273

Effect of Cold Plastic Deformation Prior to Ageing on Creep Resistance of an Al-Cu-Mg-Ag Alloy
p.278

Influence of Processing Route on the Work-Hardening and Ductile Fracture of an AA6060 Aluminium Alloy
p.284

Effect of Electroless Ni-P Plating on the Fatigue Strength of Dilute Al-Si Alloys
p.290

Influence of Particles on Short Fatigue Crack Initiation in 2050-T8 and 7050-T74
p.296

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Prediction of Fatigue Life for Light Metals and their Welded Metals

Abstract:

A6N01 (6005C in ISO) base metal is applied for cantilever type fatigue test over 10⁸ cyclic number. Fatigue strength decreases over 10⁷ and after testing, new prediction formula of fatigue life at high cycle regeion which named YENs formula is proposed for light metal and their welded joints. This formula is shown as below. Log (σa/σp) =k Log (Nf-N₀)+m σa is stress amplitude, σp is proof stress k is depend on stress concentration factor Nf is fatigue life without residual stress and No is discrepancy due to residual stress. m is material constant. This formula is a hypothesis and it is required to accumulate much more fatigue data for many kind of alloys and their welded joints.