The toughness of high hardness laminar composite steel as influenced by specimen and crack orientation
Tóm tắt
The toughness behavior of high hardness laminar composite steel (high carbon, ∼ Rc 60, hard layer metallurgically bonded to a medium carbon ∼Rc 50, softer layer) was investigated. The effort focused on the effect of test temperature, specimen orientation and crack location on toughness. Charpy V-notch specimens with the notch extending through both the hard and soft layers were tested over a series of temperatures to provide transition curves for both the longitudinal and transverse direction. These transition curves are compared to those obtained from specimens that were surface notched on either the hard or soft side. By precracking similarly oriented specimens, information on the fracture toughness (K
Q
andW/A) was obtained over approximately the same temperature range. These data show the effect of the interface between the hard and soft layer on the various toughness parameters. Lastly, stress corrosion cracking was investigated andK
ISCC
values provided.
Tài liệu tham khảo
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