Acta Photonica Sinica, Volume. 49, Issue 4, 0414004(2020)
Experimental Study on Dislocation Configuration and Grain Refinement of 690 High Strength Steel Treated by Laser Shock Processing
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Fig. 1. SEM image of 690 high strength steel with power density of 5.09 GW/cm2
Fig. 3. TEM image of 690 high strength steel with power density of 5.09 GW/cm2
Fig. 4. HRTEM image and corresponding IFFT filtered image of the precipitated phase
Fig. 6. HRTEM image of 690 high strength steel matrix by laser shock processing
Fig. 7. Dislocation configurations in the matrix of laser shocked 690 high strength steel
Fig. 8. Schematic diagram of screw dislocation motion at different cutting heights
Fig. 9. TEM image and selective electron diffraction pattern of different regions of the surface of 690 high-strength steel by laser shock
Fig. 10. Dislocation change characteristics of IFFT filtered image on the surface of 690 high-strength steel by multiple strong laser shock
Fig. 11. Grain refinement mechanism dominated by dislocation movement of 690 high-strength steel by laser shock
Table 1. Chemical composites of 690 high-strength steel and mechanical capacity
View tableView in ArticleTable 1. Chemical composites of 690 high-strength steel and mechanical capacity
Chemical composites(mass fraction/%) Mechanical capacity C Si Mn Cr σ b/MPaσ s/MPa≤1.72 ≤0.45 ≤1.24 ≤0.74 ≥690 835
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Yu-peng CAO, Cong YANG, Wei-dong SHI, Guo-ran HUA, Bin LI, Rong LI. Experimental Study on Dislocation Configuration and Grain Refinement of 690 High Strength Steel Treated by Laser Shock Processing[J]. Acta Photonica Sinica, 2020, 49(4): 0414004
Paper Information
Category: Lasers and Laser Optics
Received: Dec. 20, 2019
Accepted: Feb. 9, 2020
Published Online: Apr. 24, 2020
The Author Email: SHI Wei-dong (wdshi@ntu.edu.cn)
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