Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1576289 | Materials Science and Engineering: A | 2013 | 5 Pages |
Abstract
Ultrafine micro-duplex structure (ferrite (α)+cementite (θ)) formed in a pearlitic Fe–0.8C steel after four passes of equal channel angular pressing (ECAP) at 923 K via route Bc. Subsequently the surface of the ultra-micro-duplex structure was treated by multiple laser shock processing (LSP) impacts with different laser pulse energies. The microstructure was obviously refined due to the ultra-high plastic strain induced by LSP. The lattice parameter of α-Fe increased with the laser pulse energy, indicating that the cementite dissolution was enhanced. In addition, residual stress and microhardness increased with the LSP pulse energy.
Keywords
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Yi Xiong, Tiantian He, Zhiqiang Guo, Hongyu He, Fengzhang Ren, Alex A. Volinsky,