Analysis of Ductile-to-Brittle Transition Temperature of Stainless Steels
6 Pages Posted: 20 Apr 2018
Date Written: April 6, 2018
All ferrous materials exhibit a transition from ductile to brittle when tested above and below a certain temperature, called as Transition Temperature. The Ductile-to-Brittle Transition Temperature is a phenomenon which is mainly observed in metals. Below the particular temperature the material suddenly losses its ductility and it changes from ductile to brittle material. This paper mainly deals with the analysis and comparison of Ductile to Brittle Transition Temperature of Stainless Steels TP 304 and 316. Work is carried out in the Charpy impact test experiment, The Charpy impact test is a standardized high strain test which determines the amount of energy absorbed by different materials. The amount of energy absorbed gives the material's toughness and this property is used to study the ductile-brittle transition. The specimens then keep in the dry ice for cooling for soaking time of 15 min. Then the sample pieces are loaded into the apparatus and the pendulum hammer strikes the notched sample. The notch is put in the sample to initiate the crack propagation. After the impact the sample is removed and examined. If the material breaks on a flat surface then it is classified as brittle, if it is a jagged surface then it is classified as ductile. The graph of energy absorbed vs temperature is plotted to get the range of transition temperature.
Keywords: Ductile, Brittle
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