Formation abilities of nano-twin and ε-Martensite (cas 12173-93-2) in laser surface modification of a mid-carbon steel

Add time:08/07/2019    Source:sciencedirect.com

The formation abilities of nano-twin and ε-martensite in Fe-based laser surface modification layer were investigated. The result shows that nano-twin and ε-martensite grow by the overlapping of stacking faults on each and two (111)γ planes respectively. Si atom obviously affects the formation ability of stacking fault. A single Si atom in the supercell is the most effective way to the stress-induced nucleus of nano-twin. The nano-twin and ε-martensite can form easily as the distance between two Si atoms along [111]γ is twice interplanar crystal spacing of (111)γ, and the formation ability of ε-martensite is higher than that of nano-twin.

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