Answer / Harshita Pant

The ductile-brittle transition temperature (DBTT) of a metal can be determined by conducting impact tests, such as the Charpy V-notch test. The specimen is cooled at a controlled rate and then broken by a falling pendulum. The DBTT is the temperature at which the fracture behavior changes from ductile (high strain before breaking) to brittle (little or no plastic deformation before breaking).

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