Effects of laser shock peening on the hot corrosion behaviour of the selective laser melted Ti6Al4V titanium alloy

2021 ◽  
pp. 109558
Author(s):  
Haifei Lu ◽  
Zhao Wang ◽  
Jie Cai ◽  
Xiang Xu ◽  
Kaiyu Luo ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Hot Corrosion ◽  
Corrosion Behaviour ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Ti6al4v Titanium Alloy ◽  
Shock Peening

scholarly journals Improvement of Damping Property and Its Effects on the Vibration Fatigue in Ti6Al4V Titanium Alloy Treated by Warm Laser Shock Peening

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 746 ◽  
Author(s):  
Xiankai Meng ◽  
Yaomin Zhao ◽  
Jinzhong Lu ◽  
Shu Huang ◽  
Jianzhong Zhou ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Elevated Temperatures ◽  
Damping Ratio ◽  
Fracture Morphology ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Damping Properties ◽  
Ti6al4v Titanium Alloy ◽  
Vibration Fatigue ◽  
Shock Peening

In order to increase the vibration life of Ti6Al4V titanium alloy, warm laser shock peening (WLSP) is used to improve the damping properties and thus decrease the vibration stress in this study. Firstly, the Ti6Al4V specimens are treated by WLSP at different treatment temperatures from 200 °C to 350 °C. Then the damping ratios of untreated and WLSPed samples are obtained by impact modal tests, and the improvement of damping properties generated byWLSP is analyzed by the microstructures in Ti6Al4V titanium alloy. Moreover, the finite element simulations are utilized to study the vibration amplitude and stress during the frequency response process. Finally, the vibration fatigue tests are carried out and the fatigue fracture morphology is observed by the scanning electron microscope. The results indicate that the damping ratios of WLSPed specimens increase with the increasing treatment temperatures. This is because elevated temperatures during WLSP can effectively increase the α phase colonies and the interphase boundaries, which can significantly increase the internal friction of materials. Moreover, due to the increasing material damping ratio, the displacement and stresses during vibration were both reduced greatly by 350 °C-WLSP, which can significantly decrease the fatigue crack growth rate and thus improve the vibration fatigue life of Ti6Al4V titanium alloy.

Laser shock peening of laser additive manufactured Ti6Al4V titanium alloy

2018 ◽  
Vol 349 ◽  
pp. 503-510 ◽  
Author(s):  
Wei Guo ◽  
Rujian Sun ◽  
Binwen Song ◽  
Ying Zhu ◽  
Fei Li ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Ti6al4v Titanium Alloy ◽  
Shock Peening

Effect of laser shock peening on microstructure and hot corrosion of TC11 alloy

2018 ◽  
Vol 335 ◽  
pp. 32-40 ◽  
Author(s):  
Zhaopeng Tong ◽  
Xudong Ren ◽  
Yunpeng Ren ◽  
Fengze Dai ◽  
Yunxia Ye ◽  
...  
Keyword(s):  
Hot Corrosion ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Shock Peening

scholarly journals Investigation of Corrosion Behaviour of Aluminium Alloy Subjected to Laser Shock Peening without a Protective Coating

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
U. Trdan ◽  
J. Grum
Keyword(s):  
Shock Waves ◽  
Protective Coating ◽  
Corrosion Behaviour ◽  
Laser Shock Peening ◽  
Anodic Current Density ◽  
Strain Rates ◽  
Laser Shock ◽  
Near Surface ◽  
Shock Peening ◽  
Chloride Environment

The effect of shock waves and strain hardening of laser shock peening without protective coating (LSPwC) on alloy AA 6082-T651 was investigated. Analysis of residual stresses confirmed high compression in the near surface layer due to the ultrahigh plastic strains and strain rates induced by multiple laser shock waves. Corrosion tests in a chloride environment were carried out to determine resistance to localised attack, which was also verified on SEM/EDS. OCP transients confirmed an improved condition, that is, a more positive and stable potential after LSPwC treatment. Moreover, polarisation resistance of the LSPwC treated specimen was by a factor of 25 higher compared to the untreated specimen. Analysis of voltammograms confirmed an improved enhanced region of passivity and significantly smaller anodic current density of the LSPwC specimen compared to the untreated one. Through SEM, reduction of pitting attack at the LSPwC specimen surface was confirmed, despite its increased roughness.

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