|
|
|
| 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 |
|
|
|
|
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.
|
|
Received: 18 April 2017
Published: 15 October 2018
|
|
|
|
| [1] |
Qi-long Yong,,*,Zheng-yan Zhang,Xin-jun Sun,Jian-chun Cao,Zhao-dong Li. Effect of dissolved niobium on eutectoid transformation behavior[J]. Chinese Journal of Iron and Steel, 2017, 24(9): 973-980. |
| [2] |
Ming MA,Hua DING,Zheng-you TANG,Jing-wei ZHAO,Zhou-hua JIANG,Guang-wei FAN. Effects of Temperature and Strain Rate on Flow Behavior and Microstructural Evolution of Super Duplex Stainless Steel under Hot Deformation[J]. Chinese Journal of Iron and Steel, 2016, 23(3): 244-252. |
| [3] |
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]. Chinese Journal of Iron and Steel, 2015, 22(1): 55-59. |
| [4] |
Han MA,Shu-lun LIAO,Shi-fang WANG. Effect of Ti on Austenite Grain Growth Behavior in High Carbon Steels[J]. Chinese Journal of Iron and Steel, 2014, 21(7): 702-709. |
| [5] |
Wang SU,Wei-ling WANG,Sen LUO,Dong-bin JIANG,Miao-yong ZHU. Heat Transfer and Central Segregation of Continuously Cast High Carbon Steel Billet[J]. Chinese Journal of Iron and Steel, 2014, 21(6): 565-574. |
| [6] |
Tao WU,Yu-wei GAO,Ming-zhi WANG,Xiao-pu LI,Yu-cheng ZHAO,Qin ZOU. Influence of Initial Microstructure on Warm Deformation Processability and Microstructure of an Ultrahigh Carbon Steel[J]. Chinese Journal of Iron and Steel, 2014, 21(1): 52-59. |
|
|
|
|
2018, Vol. 25 
