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Dynamic strain aging arises from the interaction between solute atoms and matrix dislocations in strained metallic alloy. It initiates jerky dislocation motion and abrupt softening, causing negative strain rate sensitivity. This effect leads to instable flow phenomena at the macroscopic scale, appearing as a serrated stress–strain response and deformation banding. These macroscopic features are referred...
Transmission electron microscopy and atom probe tomography (APT) were used to study carbide formation, solute clustering and solute segregation to dislocations in a warm rolled low carbon steel containing a Cr addition. It was shown that formation of Cr carbides in addition to iron carbide leads to the solute C depletion of the matrix. The presence of fine C–Fe–Cr clusters in the matrix and Cottrell...
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