PSI - Issue 18

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Christoph Bleicher et al. / Procedia Structural Integrity 18 (2019) 46–62 Author name / Structural Integrity Procedia 00 (2019) 000–000

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Table 3. Results of the metallographic investigations of sound material EN-GJS-400-15 etched with 3%-igem Nital

Graphite form according to DIN EN ISO 945-1 [36] 98.6 % (V + VI) Graphite size according to DIN EN ISO 945-1 [36] 61,8 % (5 + 6) Nodularity 72,6 Fraction of Ferrite / Perlite / Graphite 83.8 / 5.0 / 11.2

Fig. 20. Classification of graphite and Dross according to Wehling (2016)

Table 4. Different forms of Dross discovered in the investigated Dross regions according to Ding (2017) Cluster String Chunk in the string

surface pit surface pit I surface pit II

normal Cluster

with vermicular graphite surroundings (Type A) with lamellar graphite surroundings (Type B)

flat chunk

smooth chunk