Analysis the Dynamic Strain of AM60 Magnesium Alloy by Means of a Single Laser Shock Processing

2011 ◽  
Vol 314-316 ◽  
pp. 1876-1880
Author(s):  
Ai Xin Feng ◽  
Gui Feng Nie ◽  
Fen Shi ◽  
Chuan Chao Xu ◽  
Huai Yang Sun ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Magnesium Alloy ◽  
Dynamic Response ◽  
Dynamic Strain ◽  
Strain Gauges ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
One Dimensional ◽  
Spot Center ◽  
Shock Processing

In order to study the dynamic response of metal of laser shock processing, dynamic strain curves of AM60 Magnesium alloy during laser shock processing were measured by resistance strain gauges. Dynamic strain curves of three equiangular rosette near the shock spot and three strain gauges of different distances from the spot center were studied. The results indicated that the strain rate of AM60 Magnesium alloy decreased and plastic deformation increased with increasing impact times. And one dimensional strain hypothesis of laser shock processing was reasonable.

Phenomenon and Analysis of Periodic Ripple Structure on Magnesium Alloy Surface Induced by Laser Shock Processing

2010 ◽  
Vol 30 (9) ◽  
pp. 2613-2619
Author(s):  
张永康 Zhang Yongkang ◽  
裴旭 Pei Xu ◽  
陈菊芳 Chen Jufang ◽  
顾永玉 Gu Yongyu ◽  
任爱国 Ren Aiguo ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Alloy Surface ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Ripple Structure ◽  
Shock Processing

Friction and Wear Properties of AZ31 Magnesium Alloy by Laser Shock Processing

2015 ◽  
Vol 42 (9) ◽  
pp. 0906003
Author(s):  
何换菊 He Huanju ◽  
张凌峰 Zhang Lingfeng ◽  
杨根妹 Yang Genmei ◽  
吕阳阳 Lü Yangyang
Keyword(s):  
Magnesium Alloy ◽  
Friction And Wear ◽  
Az31 Magnesium Alloy ◽  
Laser Shock ◽  
Wear Properties ◽  
Laser Shock Processing ◽  
Friction And Wear Properties ◽  
Shock Processing

The Fracture Microphology of the Ceramics by Strong Laser Shock Processing

2006 ◽  
Vol 532-533 ◽  
pp. 137-140 ◽  
Author(s):  
Ling Feng Zhang ◽  
Yong Kang Zhang ◽  
Ai Xin Feng
Keyword(s):  
Plastic Deformation ◽  
Brittle Fracture ◽  
Radial Crack ◽  
Laser Energy ◽  
High Energy ◽  
Laser Shock ◽  
Main Mode ◽  
Laser Shock Processing ◽  
Strong Laser ◽  
Shock Processing

The laser shocking to the Al2O3 ceramics was proceeded, and the fracture microphology that formed from the strong laser shock processing (LSP) was analyzed by the Scanning electron microscopy (SEM). It was discovered that the feature of ceramics responds differently when the laser energy was changed. The brittle fracture that consists of intergranular fracture and cleavage fracture was the main mode under high energy laser shocking (laser pulse enegry: 42J); the macroscopical fracture characteristic was the radial crack. When the laser energy reduced to a fit level (25J), the brittle fracture of ceramics appears to the characteristic of plastic deformation, its fracture microphology appears lots of slippage lines, and the macroscopical feature of radial crack under 42J become subulate crack. While the energy reduced to 15J, the Al2O3 ceramics did not fracture, its micro-hardness ascended, a feature of micro-plastic deformation was existed under the low energy. The reason of the brittle materials appears to the feature of plastic deformation was analyzed.

Surface nano-crystallization of AZ91D magnesium alloy induced by laser shock processing

2015 ◽  
Vol 86 ◽  
pp. 421-426 ◽  
Author(s):  
X.D. Ren ◽  
J.J. Huang ◽  
W.F. Zhou ◽  
S.D. Xu ◽  
F.F. Liu
Keyword(s):  
Magnesium Alloy ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Az91d Magnesium Alloy ◽  
Shock Processing

Study on High Cycle Fatigue Properties and Laser Shock Processing of AZ91D-T6 Cast Magnesium Alloy

2014 ◽  
Vol 41 (10) ◽  
pp. 1003008
Author(s):  
张青来 Zhang Qinglai ◽  
吴铁丹 Wu Tiedan ◽  
钱阳 Qian Yang ◽  
王荣 Wang Rong ◽  
洪妍鑫 Hong Yanxin ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
High Cycle Fatigue ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Cast Magnesium Alloy ◽  
Cast Magnesium ◽  
Shock Processing

scholarly journals The New Technologies Developed from Laser Shock Processing

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1453 ◽  
Author(s):  
Jiajun Wu ◽  
Jibin Zhao ◽  
Hongchao Qiao ◽  
Xianliang Hu ◽  
Yuqi Yang
Keyword(s):  
New Technologies ◽  
Dynamic Strain ◽  
Stress Effect ◽  
Metallic Materials ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Laser Induced Plasma ◽  
Technical Theory ◽  
Shock Processing ◽  
Plasma Shock

Laser shock processing (LSP) is an advanced material surface hardening technology that can significantly improve mechanical properties and extend service life by using the stress effect generated by laser-induced plasma shock waves, which has been increasingly applied in the processing fields of metallic materials and alloys. With the rapidly development of modern industry, many new technologies developed from LSP have emerged, which broadens the application of LSP and enriches its technical theory. In this work, the technical theory of LSP was summarized, which consists of the fundamental principle of LSP and the laser-induced plasma shock wave. The new technologies, developed from LSP, are introduced in detail from the aspect of laser shock forming (LSF), warm laser shock processing (WLSP), laser shock marking (LSM) and laser shock imprinting (LSI). The common feature of LSP and these new technologies developed from LSP is the utilization of the laser-generated stress effects rather than the laser thermal effect. LSF is utilized to modify the curvature of metal sheet through the laser-induced high dynamic loading. The material strength and the stability of residual stress and micro-structures by WLSP treatment are higher than that by LSP treatment, due to WLSP combining the advantages of LSP, dynamic strain aging (DSA) and dynamic precipitation (DP). LSM is an effective method to obtain the visualized marks on the surface of metallic materials or alloys, and its critical aspect is the preparation of the absorbing layer with a designed shape and suitable thickness. At the high strain rates induced by LSP, LSI has the ability to complete the direct imprinting over the large-scale ultrasmooth complex 3D nanostructures arrays on the surface of crystalline metals. This work has important reference value and guiding significance for researchers to further understand the LSP theory and the new technologies developed from LSP.

Effect of Residual Stress and Microstructures on 316 Stainless Steel Treated by LSP

2017 ◽  
Vol 898 ◽  
pp. 1261-1265 ◽  
Author(s):  
Yu Qin Li ◽  
X.D. Wang ◽  
F.L. Song ◽  
Y. Jao ◽  
S.H. Luo
Keyword(s):  
Residual Stress ◽  
Plastic Deformation ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Stress Corrosion ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
316 Stainless Steel ◽  
Stress Corrosion Resistance ◽  
Shock Processing

In order to improve the stress corrosion resistance of 316 stainless steel, a new technology was proposed and studied. The 316 stainless steel sample was treated by laser shock processing (LSP). The residual stress and microstructures of 316 stainless steel with and without LSP were measured and compared by the methods of X-ray, transmission electron microscopy (TEM) and Electron Back-ScatteredDiffraction (EBSD), and the strengthening mechanism was discussed. It showed that the high residual compressive stress introduced by laser shock processing was about-112 MPa. The TEM and EBSD results showed that severe plastic deformation and nanocrystals layer were formed by LSP, and the orientation of the grains had evident rotation in the process of plastic deformation. These helped to enhance the stress corrosion resistance of 316 stainless steel.

Research on the Theory of the Laser Shock Processing Technology

2014 ◽  
Vol 610 ◽  
pp. 1021-1028
Author(s):  
Jin Lan Lin ◽  
Jian Hong Fan
Keyword(s):  
Theoretical Model ◽  
Transmission Coefficient ◽  
Plasma Layer ◽  
Processing Technology ◽  
Laser Shock ◽  
Incident Laser ◽  
Laser Shock Processing ◽  
One Dimensional ◽  
Shock Processing ◽  
Maximum Transmission

In this paper the laser shock processing technology (LSPT) is investigated theoretically. A one-dimensional theoretical model is presented to express analytically the transmission coefficient of the incident laser beam through four different layers, i.e., the air layer, the constrained layer, the plasma layer, and the absorbing coating. Based on this model, the key parameters of LSPT can be further optimized to obtain the maximum transmission coefficient and the best surface-hardening effect. This one-dimensional theoretical model presented can be further used in guiding the parameter optimization for this technology.

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