Impacts of multiple laser shock processing on microstructure and mechanical property of high-carbon steel
Impacts of multiple laser shock processing on microstructure and mechanical property of high-carbon steel作者机构：School of Materials Science and Engineering Henan University of Science and Technology Luoyang 471023 Henan China Collaborative Innovation Center of Nonferrous Metals Luoyang 471023 Henan China Institute for Special Steels Central Iron and Steel Research Institute Beijing 100081 China Nano and Molecular Systems Research Unit University of Oulu 90014 Oulu Finland School of Mechanical and Automotive Engineering Anhui Polytechnic University Wuhu 241000 Anhui China Department of Mechanical Engineering University of South Florida Tampa FL 33620 USA
出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)
年 卷 期：2018年第25卷第4期
页 面：469-475页
核心收录：
学科分类：070207[理学-光学] 07[理学] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
基 金：国家自然科学基金 Education Department of the Henan Province the Science and Technology Innovation Team of the Henan University of Science and Technology by Program for Science, Technology Innovation Talents in Universities of the Henan Province the Science and Technology Project of the Henan Province International Scientific and Technological Cooperation Project from Science and Technology Department of Henan Province
主 题：Laser shock processing High-carbon steel Ultrafine-grained microduplex structure Mechanical property
摘 要：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.
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