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Impact of ferrite/martensite interface on nanohardness in a Dual-Phase steel: A combined experimental and theoretical study
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DOI：10.1016/j.ijplas.2026.104753.png)
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Abstract
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• The impact of ferrite/martensite (F/M) interface on nanohardness is reported. • For small indentation depths, an increase in nanohardness is observed near the F/M interface. • The increase in nanohardness follows a scaling law with the surface geometric distance to F/M interface. • A Strain Gradient Plasticity (SGP) model is used to explain the localized hardening behavior. • The increase in nanohardness is correlated to the estimated GND density near the F/M interface.
Keywords:
Nanoindentation
Hardness
Size-dependent strengthening
Ferrite/martensite interface
GND
Dual-phase steel
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