Study on the Experiment Laser Cladding and Shock Processing TC4 Titanium Alloy

2012 ◽  
Vol 538-541 ◽  
pp. 1823-1827
Author(s):  
Cheng Wang ◽  
Lei Zhou ◽  
Zhi Lin Lai ◽  
Zhi Bin An ◽  
Liu Cheng Zhou
Keyword(s):  
Titanium Alloy ◽  
Laser Cladding ◽  
Fatigue Tests ◽  
Fatigue Properties ◽  
Surface Residual Stress ◽  
Treatment Technology ◽  
Laser Shock Processing ◽  
Tc4 Titanium Alloy ◽  
Before And After ◽  
Shock Processing

In order to study the application of laser cladding and laser shock processing (LSP) combinatorial treatment technology, the laser cladding samples of TC4 titanium alloy was shocked by pulse laser, then the surface residual stress, the fatigue life were compared with those without LSP in this paper. High cycle tension-compression fatigue tests were carried out in laser cladding titanium alloy before and after LSP treated. The results indicate that LSP treatment can improve the high cycle fatigue endurance limit of laser cladding titanium alloy effectively. The nano-crystal grained surface layer with residual compressive stress makes great contributions to the improvement in fatigue properties of titanium alloy.

Fatigue Properties Research of Titanium Alloy Repaired by Laser Cladding and Laser Shock Processing

2015 ◽  
Vol 42 (11) ◽  
pp. 1103008
Author(s):  
何卫锋 He Weifeng ◽  
张金 Zhang Jin ◽  
杨卓君 Yang Zhuojun ◽  
杨竹芳 Yang Zhufang ◽  
李玉琴 Li Yuqin ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Laser Cladding ◽  
Fatigue Properties ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Shock Processing

Laser Shock Processing of Titanium Alloy Blade and FEM Simulation

2013 ◽  
Vol 456 ◽  
pp. 125-128
Author(s):  
Bing Yan ◽  
Rui Wang
Keyword(s):  
Residual Stress ◽  
Titanium Alloy ◽  
Residual Stresses ◽  
Fem Simulation ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Tc4 Titanium Alloy ◽  
Compressive Stresses ◽  
Maximum Value ◽  
Shock Processing

The aim of this article is to analyze the residual stresses field in a TC4 titanium alloy blade by laser shock processing (LSP).LSP is a new surface processing technology, it uses the laser shock wave to act on the surface of the target and form residual compressive stresses field. The ABAQUS software is applied to simulate the LSP of TC4 titanium alloy blade, and the distributions of the residual stresses field are analysed.After single LSP,the maximum value of residual stress on the surface is 309 MPa.The residual stresses on the surface increase first and then decrease.The residual stresses at the depth continue decreasing with the increase of the depth.After multiple LSP,the maximum value of residual stress on the surface is increased and plastically affected depth is increased.

scholarly journals Experimental Study on Forged TC4 Titanium Alloy Fatigue Properties under Three-Point Bending and Life Prediction

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5329
Author(s):  
Bohan Wang ◽  
Li Cheng ◽  
Dongchun Li
Keyword(s):  
Titanium Alloy ◽  
Life Prediction ◽  
High Cycle Fatigue ◽  
Fatigue Cracks ◽  
Fracture Morphology ◽  
Fatigue Tests ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Three Point Bending ◽  
Tc4 Titanium Alloy

Ultrasonic fatigue tests of TC4 titanium alloy equiaxed I, II and bimodal I, II obtained by different forging processes were carried out in the range from 105 to 109 cycles using 20 kHz three-point bending. The results showed that the S-N curves had different shapes, there was no traditional fatigue limit, and the bimodal I had the best comprehensive fatigue performance. The fracture morphology was analyzed by SEM, and it was found that the fatigue cracks originated from the surface or subsurface facets, showing a transgranular quasi-cleavage fracture mechanism. EDS analysis showed that the facets were formed by the cleavage of primary α grains, and the fatigue cracks originated from the primary α grain preferred textures, rather than the primary α grain clusters. From the microstructure perspective, the reasons for better equiaxed high-cycle-fatigue properties and better bimodal ultra-high-cycle-fatigue properties were analyzed. The bimodal I fatigue life prediction based on energy was also completed, and the prediction curve was basically consistent with the experimental data.

Prediction of micro indention depth of TC4 titanium alloy during laser shock processing

2018 ◽  
Vol 57 (12) ◽  
pp. 122703
Author(s):  
Boyong Su ◽  
Yongkang Zhang ◽  
Guifang Sun ◽  
Zhonghua Ni
Keyword(s):  
Titanium Alloy ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Tc4 Titanium Alloy ◽  
Shock Processing

Effects of Laser Shock Processing on Fatigue Performance of Ti-17 Titanium Alloy

2017 ◽  
Vol 36 (3) ◽  
pp. 285-290 ◽  
Author(s):  
Shuai Huang ◽  
Ying Zhu ◽  
Wei Guo ◽  
Hongchao Qiao ◽  
Xungang Diao
Keyword(s):  
Titanium Alloy ◽  
Electron Microscope ◽  
Stress Ratio ◽  
Fatigue Performance ◽  
Fatigue Properties ◽  
Basic Material ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Transmission Electron ◽  
Shock Processing

AbstractTi-17 titanium alloy was treated by laser shock processing (LSP) and the high-frequency fatigue properties were evaluated. The fatigue fracture and the microstructures were observed by scanning electron microscope (SEM) and transmission electron microscope (TEM). The result shows that the average fatigue life of the LSP sample increases 2.62 times at maximum stress 300 MPa under stress ratio is 0.1. The micro-hardness of the samples subjected to LSP increases 20 % compared with the basic material. The proliferation and tangles of dislocations of Ti-17 occurs and the density of dislocation increases after LSP treatment. The high dislocation density of LSP impacts changes the initiation of crack from corner to subsurface, and hinders the crack extension, thus increases the fatigue performance of the Ti-17.

Laser Shock Processing of Ni-Base Superalloy and High Cycle Fatigue Properties

2011 ◽  
Vol 697-698 ◽  
pp. 235-238 ◽  
Author(s):  
L. Zhou ◽  
Y.H. Li ◽  
W.F. He ◽  
X.D. Wang ◽  
Q.P. Li
Keyword(s):  
High Cycle Fatigue ◽  
Laser Pulses ◽  
Fatigue Properties ◽  
Treatment Technique ◽  
Cycle Fatigue ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
First Order ◽  
Shock Processing ◽  
Base Superalloy

A plasma sound wave detection method of laser shock processing (LSP) technology is proposed. Speciments of Ni-base superalloy are used in this paper. A convergent lens is used to deliver 1.2 J, 10 ns laser pulses by a Q-switch Nd:YAG laser, operating at 1 Hz. The influence of the laser density to the shock wave is investigated in detail for two different wavelength lasers. Constant amplitude fatigue data are generated in room environment using notch specimens tested at an amplitude of vibration 2.8 mm and first-order flextensional mode. The results show that LSP is an effective surface treatment technique for improving the high cycle fatigue performance of Ni-base superalloys having a factor of 1.62 improvement in fatigue life.

Effect of Y2O3on Microstructure and Wear Resistantce of Laser Cladding TiC Coating on the Surface of TC4 Titanium Alloy

Applied laser ◽  
2010 ◽  
Vol 30 (3) ◽  
pp. 199-203 ◽  
Author(s):  
王慧萍 Wang Huiping ◽  
李军 Li Jun ◽  
张光钧 Zhang Guangjun ◽  
戴建强 Dai Jianqiang ◽  
奚文龙 Xi Wenlong
Keyword(s):  
Titanium Alloy ◽  
Laser Cladding ◽  
Tc4 Titanium Alloy
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