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Ductile-Brittle Transition

2012; Springer Nature (Netherlands); Linguagem: Inglês

10.1007/978-94-007-4930-6_5

2214-7764

Dominique François, A. Pineau, A. Zaoui,

Metal Forming Simulation Techniques

For many materials impact tests display a ductile-brittle transition when temperature is lowered. Analyses of the limit moment of notched test pieces and of the stress distribution are given, especially for the Charpy specimen. Testing procedure including instrumented impact testing are described. Various ductile-brittle transition temperatures (DBT) can be defined. They are related to metallurgical variables. Drop weight tests are more representative of in-service situations. The failure analysis diagram puts together the results. Correlations exist between them. Modelling of test pieces, especially of the Charpy specimen, provides ways to predict the DBT.