Experimental Study on Dislocation Configuration and Grain Refinement of 690 High Strength Steel Treated by Laser Shock Processing

2020 ◽  
Vol 49 (4) ◽  
pp. 414004-414004
Author(s):  
曹宇鹏 Yu-peng CAO ◽  
杨聪 Cong YANG ◽  
施卫东 Wei-dong SHI ◽  
花国然 Guo-ran HUA ◽  
李彬 Bin LI ◽  
...  
Keyword(s):  
Experimental Study ◽  
Grain Refinement ◽  
High Strength Steel ◽  
High Strength ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Dislocation Configuration ◽  
Shock Processing

Strengthen Experimental Study of High Strength Steel 40CrNi2Si2MoVA Based on Laser Shock Processing

2013 ◽  
Vol 774-776 ◽  
pp. 1122-1126
Author(s):  
Yong Hua Wu
Keyword(s):  
Residual Stress ◽  
High Strength Steel ◽  
Compressive Residual Stress ◽  
High Strength ◽  
High Fracture Toughness ◽  
Laser Shock ◽  
High Fracture ◽  
Laser Shock Processing ◽  
Testing Specimen ◽  
Shock Processing

40CrNi2Si2MoVA high-strength steel is widely used in aircraft industry because of its unique combination of ultrahigh strength with high fracture toughness. However, 40CrNi2Si2MoVA is vulnerable to both corrosion fatigue and stress corrosion cracking failures with catastrophic consequences for aircraft. The high strength steel 40CrNi2Si2MoVA is enhanced and strengthen by usage of laser shock processing (LSP) with a optimal shock processing parameters, and after a series of comparion experiment in different overlap rate,the surface compressive residual stress in the testing specimen is measured and compared, and the experiment results show that the specimen surface has-962MPa compressive residual stress. Finally, the enhanced effect of compressive residual stress in surface of specimen by laser shock is discussed. The results of laser shock processing has a guiding significance to the engineering applications of high strength steel.

Experimental Study on Actual Role Area of Plasma in Laser Shock Processing

2009 ◽  
Vol 36 (5) ◽  
pp. 1224-1228 ◽  
Author(s):  
张凌峰 Zhang Lingfeng ◽  
任凤章 Ren Fengzhang ◽  
周合玉 Zhou Heyu ◽  
熊毅 Xiong Yi
Keyword(s):  
Experimental Study ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Actual Role ◽  
Shock Processing

Experimental Study of Residual Stress Formation Mechanism of 7050 Aluminum Alloy Sheet by Laser Shock Processing

2016 ◽  
Vol 43 (7) ◽  
pp. 0702008
Author(s):  
曹宇鹏 Cao Yupeng ◽  
徐影 Xu Ying ◽  
冯爱新 Feng Aixin ◽  
花国然 Hua Guoran ◽  
周东呈 Zhou Dongcheng ◽  
...  
Keyword(s):  
Residual Stress ◽  
Experimental Study ◽  
Aluminum Alloy ◽  
Alloy Sheet ◽  
Laser Shock ◽  
Aluminum Alloy Sheet ◽  
Laser Shock Processing ◽  
7050 Aluminum Alloy ◽  
Stress Formation ◽  
Shock Processing

Experimental Study on Residual Stress of K24 Superalloy in Laser Cladding Zone by Laser Shock Processing

2007 ◽  
Vol 353-358 ◽  
pp. 453-456
Author(s):  
Jin Zhon Lu ◽  
Yong Kang Zhang ◽  
Y.Y. Xu ◽  
De Jun Kong ◽  
H.B. Yao ◽  
...  
Keyword(s):  
Residual Stress ◽  
Experimental Study ◽  
Laser Cladding ◽  
Compressive Residual Stress ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
X Ray ◽  
Tempering Treatment ◽  
Shock Processing ◽  
Improve Fatigue

The surface of K24 superalloy was processed with laser cladding & LSP (laser shock processing). Residual stress in the laser cladding zone by LSP was measured with X-ray stress tester X-350A, and the variational rule of residual stress in the cladding zone by tempering treatment of 8 hours and 16 hours was measured, respectively. The experimental results show that compressive residual stress of K24 superalloy surface by laser cladding & laser shock processing is above -600MPa, which exceeds residual stress by mechanical peening treatment; and there is no clear effect on residual stress by tempering treatment at 600°C for 8 hours and 16 hours, respectively, which can improve fatigue life of K24 superalloy.

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