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Author Regordosa, Anna ♦ Llorca-Isern, Nuria ♦ Sertucha, Jon ♦ Lacaze, Jacques
Source Hyper Articles en Ligne (HAL)
Content type Text
Publisher Trans Tech Publications Inc.
File Format PDF
Language English
Subject Keyword Nodular cast iron ♦ Shrinkage ♦ Inoculation ♦ Carbon equivalent ♦ spi ♦ Engineering Sciences [physics]/Chemical and Process Engineering ♦ Engineering Sciences [physics]/Materials
Abstract Studying how shrinkage porosity changes size when varying the composition of ductile irons is still of interest for manufacturing sound cast parts and defining optimised processing conditions. Usual changes in carbon and silicon contents strongly affect shrinkage, so that a detailed analysis of the effect of alloy composition and of inoculation level on porosity was carried out in the present study. Two test castings have been used to evaluate the extent of porosity formed using different compositions and inoculation levels. It has been observed that increasing carbon content from hypoeutectic to near-eutectic compositions reduces the amount of defects while a further increase of shrinkage porosity is detected for hypereutectic compositions. Thus, a minimum in shrinkage tendency exists for slightly hypereutectic compositions. Although inoculation decreases shrinkage, the relevance of this parameter varies as a function of carbon equivalent.
ISSN 02555476
Educational Use Research
Learning Resource Type Article
Publisher Date 2018-06-01
e-ISSN 16629760
Journal Materials Science Forum
Volume Number 925
Page Count 8
Starting Page 28
Ending Page 35