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casting failures list pg7 - Coggle Diagram
casting failures
list pg7
poor fit of casting
various reasons for each
too large
too small
distortion
surface roughness pg11
diff causes pg12-13
surface irregularities
know diff ones and causes
air bubbles
minute ridges or veins
voids
porosity pg 22
internal and external
caused by cooling n solidification
localised shrinkage porosity
microporosity
sub-surface porosity
back pressure porosity
causes
manifestation
due to turbulence
caused by gases
pin-hole porosity
gas inclusion
incomplete casting
causes
manifestation
contamination of casting
some random extra thing:
remelting of alloy