Issue 49

M. J. Adinoyi et alii, Frattura ed Integrità Strutturale, 49 (2019) 487-506; DOI: 10.3221/IGF-ESIS.49.46

MPa megaPascal n

monotonic tensile strain hardening exponent

N f ref

fatigue life referenced specimen

Spec T1

metallographic sample from edge of transverse direction

T2 metallographic sample from midsection between the edge and center of transverse direction T3 metallographic sample from center of transverse direction α primary grains in the extrusion direction ε a axial strain amplitude ε e axial elastic strain amplitude ε f ‘ fatigue ductility coefficient ε p axial plastic strain amplitude σ a axial stress amplitude σ f ‘ fatigue strength coefficient σ m mean axial stress σ max maximum axial stress σ min minimum axial stress

506