Spongy shrinkage in ductile iron 2

[Hercules28]

Dear all,

Of the top of your heads,
what are the main reasons for spongy shrinkage in Ductile iron?

Thanks,

Herc

 

[berkshire]

There was something Fizzing in there when it was cast

The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them. Old professor

 

[metengr]

Nothing is off of the top of my head because I have a lousy memory as I age. However, I know here to find information

http://www.sandb.de/uploads/media/08_Micro-cavities.pdf

 

[arunmrao]

Spongy shrinkage is also referred to as secondary shrinkage or interdendritic shrinkage. Probable causes for these defects could be high C.E, heavy section thickness,weak mold strength .Hope it helps.

_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year