Determination of the endurance limit of the surface layer of a part after processing with a blade tool

2021 ◽  
pp. 56-61
Author(s):  
Keyword(s):  
Surface Roughness ◽  
Surface Layer ◽  
Fatigue Strength ◽  
Residual Stresses ◽  
Quality Indicators ◽  
Work Hardening ◽  
Endurance Limit ◽  
Layer Surface ◽  
Processing Mode

The dependences of the quality indicators of the surface layer of parts on the fatigue strength are analyzed. The dependences are given, taking into account both the quality indicators of the surface layer of the part after processing with the blade tool, and the parameters of the processing mode. Keywords: surface layer, surface roughness, residual stresses, work-hardening depth, endurance limit, blade tool processing. [email protected]

scholarly journals Rated definition of degree of cutter coating influence upon parameters of surface layer quality of parts worked

2017 ◽  
Vol 2 (7) ◽  
pp. 20-24
Author(s):  
Вячеслав Безъязычный ◽  
Vyacheslav Bezyazychnyy ◽  
Максим Басков ◽  
Maksim Baskov
Keyword(s):  
Surface Roughness ◽  
Surface Layer ◽  
Residual Stresses ◽  
Layer Surface ◽  
Wear Resistant Coatings ◽  
Cutter Wear ◽  
Definition Of ◽  
Surface Layer Quality ◽  
The Impact

The impact of cutter wear-resistant coatings upon cutting process parameters and characteristics of surface layer quality in the parts worked: residual stresses, a degree and a depth of work hardening of a surface layer, surface roughness is investigated.

Calculated determination of strength characteristics of assembly joints with tightness taking into account the technological conditions for processing the surfaces

2021 ◽  
pp. 30-34
Author(s):  
V.F. Bezjazychnyi ◽  
M.A. Prokofiev ◽  
F.R. Zhirnova
Keyword(s):  
Surface Roughness ◽  
Surface Layer ◽  
Quality Indicators ◽  
Strength Characteristics

The method of calculating the strength of the joint with tension taking into account the technological conditions for processing the mating surfaces, which determine the quality indicators of the surface layer of the material of these surfaces: the surface roughness and the degree of their hardening, was described.

Effect of shot peening residual stresses and surface roughness on fretting fatigue strength of Al 7075-T651

2020 ◽  
Vol 142 ◽  
pp. 106004 ◽  
Author(s):  
Vicente Martín ◽  
Jesús Vázquez ◽  
Carlos Navarro ◽  
Jaime Domínguez
Keyword(s):  
Surface Roughness ◽  
Fatigue Strength ◽  
Residual Stresses ◽  
Shot Peening ◽  
Fretting Fatigue ◽  
Al 7075

X-Ray Diffraction Analysis of Steel with Oxidised Surface Layer

2016 ◽  
Vol 368 ◽  
pp. 99-102
Author(s):  
Lukáš Zuzánek ◽  
Ondřej Řidký ◽  
Nikolaj Ganev ◽  
Kamil Kolařík
Keyword(s):  
Residual Stress ◽  
Surface Layer ◽  
Residual Stresses ◽  
Diffraction Analysis ◽  
Oxide Surface ◽  
X Ray Diffraction ◽  
X Ray ◽  
Electrolytic Polishing ◽  
Small Depth

The basic principle of the X-ray diffraction analysis is based on the determination of components of residual stresses. They are determined on the basis of the change in the distance between atomic planes. The method is limited by a relatively small depth in which the X-ray beam penetrates into the analysed materials. For determination of residual stresses in the surface layer the X-ray diffraction and electrolytic polishing has to be combined. The article is deals with the determination of residual stress and real material structure of a laser-welded steel sample with an oxide surface layer. This surface layer is created during the rolling and it prevents the material from its corrosion. Before the X-ray diffraction analysis can be performed, this surface layer has to be removed. This surface layer cannot be removed with the help of electrolytic polishing and, therefore, it has to be removed mechanically. This mechanical procedure creates “technological” residual stress in the surface layer. This additional residual stress is removed by the electrolytic polishing in the depth between 20 and 80 μm. Finally, the real structure and residual stresses can be determined by using the X-ray diffraction techniques.

Technological support of physical-mechanical properties surface layer in parts at electro-mechanical finishing

2020 ◽  
Vol 2020 (12) ◽  
pp. 22-30
Author(s):  
Vladimir Fedorov ◽  
Anatoliy Suslov ◽  
Maksim Nagorkin
Keyword(s):  
Mechanical Properties ◽  
Surface Layer ◽  
Residual Stresses ◽  
Work Hardening ◽  
Mechanical Treatment ◽  
Cold Work ◽  
Alternating Current ◽  
Experimental Investigations ◽  
Processing Factor ◽  
Technological Support

The problems in the parameter formation of cold work hardening and residual stresses of a surface layer in steel 45 parts at electro-mechanical finishing with the use of alternating current are considered. There are presented proce-dures for experimental investigations and their standard results as tables and diagrams. The analysis of processing factor impact upon characteristics under investigation is carried out. The simulators of their formation in the course of processing which can be used in practice are obtained. With the use of the method of simulation there is defined para-metric reliability of the technological system of electro-mechanical treatment on the characteristics of physical-mechanical properties of a surface.

Influence of Microshot Peening on Surface Layer Characteristics of Cold Tool Steel

2007 ◽  
Vol 561-565 ◽  
pp. 897-900 ◽  
Author(s):  
Yasunori Harada ◽  
Kenzo Fukaura ◽  
Toshinori Aoki ◽  
Daien Yokoi ◽  
Yasushi Haruna
Keyword(s):  
Residual Stress ◽  
Surface Roughness ◽  
Surface Layer ◽  
Fatigue Strength ◽  
Tool Steel ◽  
Compressive Residual Stress ◽  
Heating Furnace ◽  
Cemented Carbide ◽  
Compressed Air ◽  
New Type

Shot peening is a surface treatment and improves the performance of engineering components. More recently, a new type of microshot has been developed to enhance peening effect. In the present study, the influence of microshot peening on the surface layer characteristics of cold tool steel was investigated. In the experiment, the microshot peening apparatus with a heating furnace was produced experimentally. The projective method of the microshot was a compressed air type. The peening microshots of 0.1mm diameter were cemented carbide and the workpiece was commercially cold tool steel SKD11. Surface roughness, compressive residual stress, and hardness in the peened workpiece were measured. The effect of microshot peening on the fatigue strength of cold tool steel was also examined. The use of hard microshot such as cemented carbide was found to cause a significantly enhanced peening effect for cold tool steel.

Experimental Research on Grinding Surface Layer Behavior and Process Parameter Optimization of Spiral Bevel Gears

2014 ◽  
Vol 936 ◽  
pp. 1707-1715
Author(s):  
Xing Zu Ming ◽  
Zhong Gun Li ◽  
Xian Wen Xiong ◽  
Jing Zhou
Keyword(s):  
Surface Roughness ◽  
Surface Layer ◽  
Residual Stresses ◽  
Grinding Process ◽  
Micro Hardness ◽  
Layer Depth ◽  
Spiral Bevel Gears ◽  
Bevel Gears ◽  
Layer Behavior ◽  
Spiral Bevel

Based on the test analyses of grinding surface layer behavior of spiral bevel gears, many conclusions are gotten. Compressive residual stresses are occurred on grinding tooth surface, tensile residual stresses are located in tooth layer, and change laws of grinding residual stresses are different from ones of grinding surface roughness Ra as the grinding process parameters. A temper layer is occurred in tooth layer after normal grinding, and the micro-hardness of grinding surface is lower. When arriving at the critical condition, namely grinding temperature is above 600 degree Celsius, and metamorphic layer depth is greater than 0.2mm, different degree of grinding burn is produced, and their microstructures are changed. Based on grinding orthogonal test L16(45), the optimizing configuration of grinding process parameters of spiral bevel gear is obtained by using a mean variance analysis of integrated balance method. Based on the test optimization of grinding surface layer behavior, the comprehensive performances of grinding surface, such as grinding residual stresses, surface roughness, micro-hardness and structure, metamorphic layer depth et al, are better. These provide a basis for improvement of grinding surface quality of spiral bevel gears.

Application of the Concept of Local Fatigue Strength after Shot Peening of Notched Components Based on Numerical Simulations

2010 ◽  
Vol 638-642 ◽  
pp. 912-917
Author(s):  
Manuel Klemenz ◽  
Volker Schulze
Keyword(s):  
Surface Layer ◽  
Fatigue Strength ◽  
Fatigue Limit ◽  
Shot Peening ◽  
Surface Characteristics ◽  
Complex Stress ◽  
Simulated Surface ◽  
Induced Changes ◽  
Notched Components

Shot Peening is a well established mechanical surface treatment to induce compressive residual stresses and work hardening into the surface layer of components exposed to cyclic loading. Due to the induced changes in the surface layer, the fatigue limit increases significantly. The concept of local fatigue strength is based on the comparison of the locally effective fatigue limit with locally active loads in order to estimate the maximum outer loading that will not exceed fatigue limit. In this paper an approach of using simulated surface characteristics after shot peening for the determination of the local fatigue strength will be presented. The complex stress distribution due to cyclic bending of notched geometries will also be determined by FEM. Finally the simulated estimation of the fatigue limit of differently notched specimens of AISI 4140 will be verified with experimentally determined fatigue limits.

Sign in / Sign up

Export Citation Format

Share Document