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Instrumentierte Kerbschlagprüfung von Kleinproben aus Duplexstahl
Author(s) -
Wunder J.,
Karl A.,
Dwars A.,
Böhm A.
Publication year - 2013
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201300080
Subject(s) - charpy impact test , hammer , materials science , pendulum , duplex (building) , impact , brittleness , stiffness , embrittlement , composite material , isothermal process , metallurgy , structural engineering , mechanical engineering , engineering , toughness , physics , dna , biology , genetics , thermodynamics
The paper describes a new approach to characterize metallic materials by a novel instrumented notch impact test for samples with small specimen size. A piezo‐electric sensor mounted on the pendulum hammer provides force information during the fracture process. By numerical integration of the signal the absorbed impact energy can be calculated very exactly. Further information about the fracture behavior can be extracted from the resulting force‐displacement‐diagram. Several duplex stainless steels in different heat treatment conditions were tested and compared to standard Charpy impact testing specimen. It is concluded that different grades of embrittlement of duplex materials can be detected with high accuracy. Due to a data acquisition rate of 250 kilo‐samples/second and limited stiffness of the pendulum hammer impact energies of less than 7% of maximum energy materials with high brittleness can only be characterized qualitatively.