Title of article
Effects of laser shock processing on surface microstructure and mechanical properties of ultrafine-grained high carbon steel
Author/Authors
Xiong، نويسنده , , Yi and He، نويسنده , , Tiantian and Guo، نويسنده , , Zhiqiang and He، نويسنده , , Hongyu and Ren، نويسنده , , Fengzhang and Volinsky، نويسنده , , Alex A.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2013
Pages
5
From page
82
To page
86
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
Pearlitic steels , Ultrafine grained microstructure , Laser shock processing , Equal channel angular pressing , Residual stress , Microhardness
Journal title
MATERIALS SCIENCE & ENGINEERING: A
Serial Year
2013
Journal title
MATERIALS SCIENCE & ENGINEERING: A
Record number
2172863
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