Analysis of Ductile-to-Brittle Transition Temperatu re of Mild Steel
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Abstract
nomenon that is widely observed in metals.
Below critical temperature (DBTT), the material suddenly loss ductil
ity and becomes brittle. The controlling
mechanism of this transition still remains unclear despite of la
rge efforts made in experimental and
theoretical investigation. All ferrous materials (except the a
ustenitic grades) exhibit a transition from ductile
to brittle when tested above and below a certain temperature, calle
d as Transition Temperature. The paper
deals with the determination of the ‘Ductile to Brittle Trans
ition Temperature of stainless steel. Work
carried out in this is purchasing the material followed by test s
pecimen preparation. The specimens then
keep in the liquid nitrogen for cooling for soaking time of 15 min. Then th
e actual charpy impact testing of
the specimens at variable temperature ranging are carried out
in controlled atmosphere. The readings taken
are the impact energy (joules) of specimen at specific temper
ature. The graph of energy absorbed vs
temperature is plotted to get the range of transition temperature.
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