ICF4 response: Discussion of “ductile fracture initiation and propagation in ferritic S.G. cast Iron,”

✍ Scribed by G. Jolley

• Publisher: Springer Netherlands
• Year: 1978
• Tongue: English
• Weight: 158 KB
• Volume: 14
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00016003

✦ Synopsis

In a recent paper by Jolley and Holdsworth [I] experimental data was produced to show that variation in graphite spheroid volume fraction and spacing within a ferrite matrix did not affect the value of 8i, the COD at fibrous crack initiation.

The authors also showed evidence of intergranular fracture in the initiation region and suggested that fracture in the material might initiate in the matrix by intergranular or transgranular means and not at the spheroid/matrix interface thus explaining the lack of dependence of 8i on interparticle spacing and volume fraction. In Discussion, Tait has forwarded a different interpretation on these results. On the basis of an analytical treatment he concluded that 8i would not be expected to vary in the range of particle spacings and volume fractions tested and that, presumably, the original conclusion that initiation of ductile fracture occurred away from the spheroids was not necessarily valid.

It is hoped in the following discussion to clarify the existing situation.