Crack Paths 2012

Table 1. Mechanical properties of the investigated EN-GJS-400-18LT.

Young’s modulus E (Gpa)

tensile strength Vuts (MPa) yield stress Vy (MPa) elongation at rupture Hr (-)

Poisson’s ratio

Q (-)

374

179

0.27

242

0.229

The fracture mechanical properties of the investigated EN-GJS-400-18LT, which are of

importance in order to classify the detected overload effects, were determined in

constant amplitude tests. The threshold value 'Kth under constant amplitude loading

with a stress ratio of R = 0.5 and the critical stress intensity factor KIq for crack

initiation were found to be 'Kth = 6.0 M P a ¥ Pand KIq = 03D¥P.

Figure 1. Microstructure of the investigated EN-GJS-400-18LT.

Table 2. Graphite morphology parameters of the investigated EN-GJS-400-18LT.

particle diameter dG (Pm)

volume fraction f0 (-)

particle distance O (Pm)

noduFla(r-i)ty

particlesperunitarea

Na (mm-2)

0.12

41

58

0.53

124

237