中南大学学报（英文版）
中南大學學報（英文版）
중남대학학보（영문판）
Journal of Central South University
2015年
12期
4515-4520
,共6页
熊毅%贺甜甜%李鹏燕%陈路飞%任凤章%Alex A. Volinsky
熊毅%賀甜甜%李鵬燕%陳路飛%任鳳章%Alex A. Volinsky
웅의%하첨첨%리붕연%진로비%임봉장%Alex A. Volinsky
pearlitic steel%laser shock processing%microstructure%microhardness%residual stress
Surface microstructure and mechanical properties of pearlitic Fe–0.8%C (mass fraction) steel after laser shock processing (LSP) with different laser pulse energies were investigated by scanning electron microscopy(SEM), transmission electron microscopy(TEM), X-ray diffraction(XRD) and microhardness measurements. After LSP, the cementite lamellae were bent, kinked and broken into particles. Fragmentation and dissolution of the cementite lamellae were enhanced by increasing the laser pulse energy. Due to the dissolution of carbon atoms in the ferritic matrix, the lattice parameter ofα-Fe increased. The grain size of the surface ferrite was refined, and the microstructure changed from lamellae to ultrafine micro-duplex structure (ferrite (α)+cementite (θ)) with higher laser pulse energy, accompanied by the residual stress and microhardness increase.
