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The following data were obtained from impact tests performed on a ductile cast iron containing 0.30% manganese. The ductile b
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Answer #1

DBBT is the minimum impact energy absorbed in the given range of temperature. Hence, from the data of impact energy provided in the table which varies with test temperature shows that impact energy keeps on decreasing with decrease in temperature. and hence from given options energy absorbed by speciman is very low at -12.5oc. So, from the given options DBTT is option (a) -12.5oc.

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