Microstructure Evolution and Microhardness of Ultrafine-grained High Carbon Steel during Multiple Laser Shock Processing
Yi XIONG1,2,Tian-tian HE3,Feng-zhang REN1,2,Peng-yan LI1,Lu-fei CHEN1,Alex A. VOLINSKY4
1. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003,Henan, China 2. Henan Collaborative Innovation Center of Non-ferrous Metal Generic Technology, Luoyang 471003, Henan, China 3. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning,China 4. Department of Mechanical Engineering, University of South Florida, Tampa FL 33620, USA
Microstructure Evolution and Microhardness of Ultrafine-grained High Carbon Steel during Multiple Laser Shock Processing
Yi XIONG1,2,Tian-tian HE3,Feng-zhang REN1,2,Peng-yan LI1,Lu-fei CHEN1,Alex A. VOLINSKY4
1. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003,Henan, China 2. Henan Collaborative Innovation Center of Non-ferrous Metal Generic Technology, Luoyang 471003, Henan, China 3. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning,China 4. Department of Mechanical Engineering, University of South Florida, Tampa FL 33620, USA
ժҪ Surface microstructure and microhardness of (ferrite+cementite) microduplex structure of the ultrafine-grained high carbon steel after laser shock processing (LSP) with different impact times were investigated by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and microhardness measurements. Equiaxed ferrite grains were refined from 400 to 150 nm, and the cementite lamellae were fully spheroidized, with a decrease of the particle diameter from 150 to 100 nm as the impact times increased. The cementite dissolution was enhanced significantly. Correspondingly, the lattice parameter of ��-Fe and microhardness increased with the impact times.
Abstract��Surface microstructure and microhardness of (ferrite+cementite) microduplex structure of the ultrafine-grained high carbon steel after laser shock processing (LSP) with different impact times were investigated by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and microhardness measurements. Equiaxed ferrite grains were refined from 400 to 150 nm, and the cementite lamellae were fully spheroidized, with a decrease of the particle diameter from 150 to 100 nm as the impact times increased. The cementite dissolution was enhanced significantly. Correspondingly, the lattice parameter of ��-Fe and microhardness increased with the impact times.
Yi XIONG,,Tian-tian HE,Feng-zhang REN,,Peng-yan LI,Lu-fei CHEN,Alex A. VOLINSKY. Microstructure Evolution and Microhardness of Ultrafine-grained High Carbon Steel during Multiple Laser Shock Processing[J]. �й������ڿ���, 2015, 22(1): 55-59.
Yi XIONG,,Tian-tian HE,Feng-zhang REN,,Peng-yan LI,Lu-fei CHEN,Alex A. VOLINSKY. Microstructure Evolution and Microhardness of Ultrafine-grained High Carbon Steel during Multiple Laser Shock Processing. Chinese Journal of Iron and Steel, 2015, 22(1): 55-59.
2015, Vol. 22 
