Impacts of multiple laser shock processing on microstructure and mechanical property of high-carbon steel
Yi Xiong1,2? Tian-tian He1 ? Yan Lu1 ? Han-sheng Bao3 ? Yong Li3 ? Feng-zhang Ren1,2 ? Wei Cao4,5 ? Alex A. Volinsky6
1 School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, Henan, China 2 Collaborative Innovation Center of Nonferrous Metals, Luoyang 471023, Henan, China 3 Institute for Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China 4 Nano and Molecular Systems Research Unit, University of Oulu, 90014 Oulu, Finland 5 School of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu 241000, Anhui, China 6 Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USA
Impacts of multiple laser shock processing on microstructure and mechanical property of high-carbon steel
Yi Xiong1,2? Tian-tian He1 ? Yan Lu1 ? Han-sheng Bao3 ? Yong Li3 ? Feng-zhang Ren1,2 ? Wei Cao4,5 ? Alex A. Volinsky6
1 School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, Henan, China 2 Collaborative Innovation Center of Nonferrous Metals, Luoyang 471023, Henan, China 3 Institute for Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China 4 Nano and Molecular Systems Research Unit, University of Oulu, 90014 Oulu, Finland 5 School of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu 241000, Anhui, China 6 Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USA
ժҪ Multiple laser shock processing (LSP) impacts on microstructures and mechanical properties were investigated through morphological determinations and hardness testing. Microscopic results show that without equal channel angular pressing (ECAP), the LSP-treated lamellar pearlite was transferred to irregular ferrite matrix and incompletely broken cementite particles. With ECAP, LSP leads to refinements of the equiaxed ferrite grain in ultrafine-grained microduplex structure from 400 to 150 nm, and the completely spheroidized cementite particles from 150 to 100 nm. Consequentially, enhancements of mechanical properties were found in strength, microhardness and elongations of samples consisting of lamellar pearlite and ultrafine-grained microduplex structure. After LSP, a mixture of quasi-cleavage and ductile fracture was formed, different from the typical quasi-cleavage fracture from the original lamellar pearlite and the ductile fracture of the microduplex structure.
Abstract��Multiple laser shock processing (LSP) impacts on microstructures and mechanical properties were investigated through morphological determinations and hardness testing. Microscopic results show that without equal channel angular pressing (ECAP), the LSP-treated lamellar pearlite was transferred to irregular ferrite matrix and incompletely broken cementite particles. With ECAP, LSP leads to refinements of the equiaxed ferrite grain in ultrafine-grained microduplex structure from 400 to 150 nm, and the completely spheroidized cementite particles from 150 to 100 nm. Consequentially, enhancements of mechanical properties were found in strength, microhardness and elongations of samples consisting of lamellar pearlite and ultrafine-grained microduplex structure. After LSP, a mixture of quasi-cleavage and ductile fracture was formed, different from the typical quasi-cleavage fracture from the original lamellar pearlite and the ductile fracture of the microduplex structure.
Yi Xiong,? Tian-tian He ? Yan Lu ? Han-sheng Bao ? Yong Li ? Feng-zhang Ren, ? Wei Cao,5 ? Alex A. Volinsky6. Impacts of multiple laser shock processing on microstructure and mechanical property of high-carbon steel[J].Journal of Iron and Steel Research International, 2018, 25(4): 469-475.
Yi Xiong,? Tian-tian He ? Yan Lu ? Han-sheng Bao ? Yong Li ? Feng-zhang Ren, ? Wei Cao,5 ? Alex A. Volinsky6. Impacts of multiple laser shock processing on microstructure and mechanical property of high-carbon steel. , 2018, 25(4): 469-475.
2018, Vol. 25 
