Impacts of multiple laser shock processing on microstructure and mechanical property of high-carbon steel
|Author:||Xiong, Yi1,2; He, Tian-tian1; Lu, Yan1;|
1School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, Henan, China
2Collaborative Innovation Center of Nonferrous Metals, Luoyang 471023, Henan, China
3Institute for Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China
4Nano and Molecular Systems Research Unit, University of Oulu, 90014 Oulu, Finland
5School of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu 241000, Anhui, China
6Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USA
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe201902054028
|Publish Date:|| 2019-04-05
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.
Journal of iron and steel research international
|Pages:||469 - 475|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
214 Mechanical engineering
This work was supported by the NSFC (50801021, 51201061) and by Program for Science, Technology Innovation Talents in Universities of the Henan Province (17HASTIT026), the Science and Technology Project of the Henan Province (152102210077), International Scientific and Technological Cooperation Project from Science and Technology Department of Henan Province (172102410032), Education Department of the Henan Province (16A430005) and the Science and Technology Innovation Team of the Henan University of Science and Technology (2015XTD006).
© China Iron and Steel Research Institute Group 2018. This is a post-peer-review, pre-copyedit version of an article published in J. Iron Steel Res. Int. The final authenticated version is available online at: https://doi.org/10.1007/s42243-018-0047-x.