1994 Volume 60 Issue 575 Pages 1530-1537
In order to clarify the physical basis of scatter in the fatigue life of age-hardened Al alloy 6061-T6, rotating bending fatigue tests of smooth specimens were carried out at several stress levels. Fifteen or seventeen specimens were fatigued at each stress level and the initiation and propagation behaviors of major cracks were examined for all specimens. The statistical treatment of each set of lifetime data was performed by assuming the Weibull distribution. The lifetimes studied here were the fatigue life, the initiation life of 30μm crack and the crack propagation lives from 30μm up to 100μm, from 100μm up to 1 mm and from 1 mm to fracture, respectively. The scatter characteristics of these lifetimes were investigated based on the CV vs σa relation (CV : coefficient of variation, σa : stress amplitude).
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
Transactions of the Japan Society of Mechanical Engineers Series C
Transactions of the Japan Society of Mechanical Engineers Series B
