Prediction Charpy impact energy of bcc and fcc functionally graded steels in crack divider configuration by strain gradient plasticity theory

摘要: Abstract In the present study, Charpy impact energy of bcc ferritic and fcc austenitic functionally graded steels produced by electroslag remelting process has been investigated. To produce steels, an electrode consists two different spot welded slices from plain carbon stainless were utilized. Functionally steel containing layers ferrite or austenite may be fabricated via diffusion alloying elements during stage. specimens obtained experimentally in crack divider configuration modeled with mechanism-based strain gradient plasticity theory. this regard, density statistically stored dislocations that geometrically necessary was related to Vickers hardness each layer. Afterwards, predicted layer its energy. Finally, specimen calculated using rule mixtures. The energies are good agreement those experiments.