Journal
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
Volume 19, Issue 7, Pages 1058-1064Publisher
SPRINGER
DOI: 10.1007/s11665-009-9578-4
Keywords
crack arrester; distance of notch; functionally graded steel; impact energy; plastic zone
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Charpy impact energy of functionally graded steels produced by electroslag remelting composed of graded ferrite and austenite layers together with bainite or martensite intermediate layer in the form of crack arrester configuration has been investigated. The results obtained in the present study indicate that the notch tip position with respect to bainite or martensite layer significantly affects the impact energy. The closer the notch tip to the tougher layer, the higher the impact energy of the composite due to increment of energy absorbed by plastic deformation zone ahead of the notch and vice versa. Empirical relationships have been determined to correlate the impact energy of functionally graded steels to the morphology of layers.
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