Plastic deformation and sliding friction of metals

Wear ◽  
1979 ◽  
Vol 53 (2) ◽  
pp. 345-370 ◽  
Author(s):  
D.A. Rigney ◽  
J.P. Hirth
Keyword(s):  
Plastic Deformation ◽  
Sliding Friction

Friction Force and Stresses Analysis for Contact of Assembled Details

2006 ◽  
Vol 113 ◽  
pp. 334-338
Author(s):  
Z. Dreija ◽  
O. Liniņš ◽  
Fr. Sudnieks ◽  
N. Mozga
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Plastic Deformation ◽  
Friction Force ◽  
Sliding Friction ◽  
Friction Model ◽  
Contact Interface ◽  
Finite Element Program ◽  
Elastic Plastic ◽  
Element Program

The present work deals with the computation of surface stresses and deformation in the presence of friction. The evaluation of the elastic-plastic contact is analyzed revealing three distinct stages that range from fully elastic through elastic-plastic to fully plastic contact interface. Several factors of sliding friction model are discussed: surface roughness, mechanical properties and contact load and areas that have strong effect on the friction force. The critical interference that marks the transition from elastic to elastic- plastic and plastic deformation is found out and its connection with plasticity index. A finite element program for determination contact analysis of the assembled details and due to details of deformation that arose a normal and tangencial stress is used.

Coulomb Friction, Plasticity, and Limit Loads

1954 ◽  
Vol 21 (1) ◽  
pp. 71-74
Author(s):  
D. C. Drucker
Keyword(s):  
Plastic Deformation ◽  
Coulomb Friction ◽  
Limit Theorems ◽  
Sliding Friction ◽  
Cohesionless Soil ◽  
Limit Loads ◽  
Perfectly Plastic

Abstract Additional attention is given to the somewhat subtle but extremely important difference between Coulomb friction and the apparently corresponding resistance to plastic deformation. It is shown that the limit theorems previously proved for assemblages of perfectly plastic bodies do not always apply when there is finite sliding friction. Theorems are developed which relate the limit loads with finite Coulomb friction to the extreme cases of zero friction and of complete attachment, and also to the case where the frictional interfaces are “cemented” together with a cohesionless soil.

scholarly journals Investigation of tribotechnical and corrosion behaviour of material for light-alloy drill pipes

2018 ◽  
Vol 18 (1) ◽  
pp. 21-27
Author(s):  
Alina I. Shakirova ◽  
Rustem A. Ismakov ◽  
Akhtyam Kh. Agliullin ◽  
Nikolai K. Tsenev
Keyword(s):  
Plastic Deformation ◽  
Aluminum Alloys ◽  
Severe Plastic Deformation ◽  
Sliding Friction ◽  
Corrosion Behaviour ◽  
High Strength ◽  
The Arctic ◽  
Light Alloy ◽  
Pipe Surface ◽  
Drill Pipes

Special aluminum alloys appear to be promising materials for manufacture of high-strength light-alloy drill pipes (HSLADP) that can be used in areas with a severe climate and challenging geology. The effect of using light-alloy drill pipes (LADP) depends directly on the properties of the aluminum alloys from which such pipes are made. As the wells become deeper and horizontal wellbores get longer, use of LADPs becomes more relevant. Since light-alloy pipes are 2.8 times softer than steel pipes, LADPs offer the same performance as steel drill pipes of the lowest strength grade even in the case of rotary drilling. The materials from which such pipes are made have a number of unique advantages: extra light weight in the drill mud, allowing the coefficient of sliding friction between the pipe surface and the borehole wall to be reduced; high corrosion resistance in aggressive media with A high concentration of hydrogen sulfide and carbon dioxide; and high magnetic inductive capacity that allows LADPs to be used as a housing for MWD (measurement while drilling) and LWD (logging while drilling) telemetry systems during well-drilling operations. This study suggests methods for industrial production of submicrocrystalline (SMC) structure in aluminum alloys with the help of severe plastic deformation. Through the example of model aluminum-lithium alloys 1420 (Al-Mg-Li-Zr) and 1460 (Al-Сu-Li-Zr), the researchers demonstrate that SMC structure helps significantly increase resistance to wear and reduce the rate of corrosion depending on the pH value. The research team also states that severe plastic deformation methods may be used to develop highly promising technologies for manufacture of high-strength LADPs with advanced strain-stress properties for use during operations in the Arctic.

Study on Tribological Behavior and Mechanisms of Weldox960 Steel

2011 ◽  
Vol 415-417 ◽  
pp. 2191-2195
Author(s):  
Ye Fa Tan ◽  
Bin Cai ◽  
Long He ◽  
Sheng Qiang Hao ◽  
Hua Tan ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Abrasive Wear ◽  
Work Hardening ◽  
Wear Mechanisms ◽  
Sliding Friction ◽  
Tribological Behavior ◽  
Critical Value ◽  
Dry Sliding ◽  
Wear Rates ◽  
Oxidation Wear

Weldox960 steel is widely used in mechanical structure of military equipments as anti-wear parts. The tribological behavior and mechanisms of weldox960 steel were investigated under dry sliding friction conditions. The results show that friction coefficient of the steel increases from 0.268 to 0.365 with the increase of load. When the loads are smaller than 8N, the wear rates of the steel are in the range of 0.57~0.67×10-3 mm3/m, and the wear mechanism is multi-plastic deformation wear. If the loads are bigger than 10N, the wear rates increase to the range of 1.29~1.43×10-3 mm3/m, and the wear mechanisms change into delamination of the work-hardening layer and abrasive wear. The friction coefficients keep in a steady state of about 0.31 when the sliding speeds change from 0.05m/s to 0.2m/s. At the low speeds of 0.05m/s and 0.1 m/s, the wear rates are in the range of 1~1.3×10-3 mm3/m and the wear mechanisms are multi-deformation wear and abrasive wear. When the sliding speed increases to a critical value of 0.15m/s, the wear rates increase to 6.2×10-3 mm3/m and the wear mechanisms change into fatigue delamination of the work-hardening layer and multi-plastic deformation wear as well as oxidation wear.

scholarly journals Comparative Study on the Dry Sliding Friction Properties of In-Situ Micron and Submicron (Ti-V)C Reinforced Fe-Based Laser Cladding Layers

Metals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 742 ◽  
Author(s):  
Yunpeng Liu ◽  
Hui Zhang ◽  
Guangchun Xiao ◽  
Wei Zhao ◽  
Hui Xu
Keyword(s):  
Plastic Deformation ◽  
Laser Cladding ◽  
Sliding Friction ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Cladding Layer ◽  
Average Grain Size ◽  
Dry Sliding Friction ◽  
Cladding Layers

By optimising the particle size of cladding alloy powders, in situ micron and submicron (Ti-V)C reinforced Fe-based laser cladding layers were prepared and the dry sliding friction properties were comparatively studied. Results showed that there were same phases of α-Fe, γ, TiC, and TiVC2 in the two cladding layers. The average grain size of the Fe-based matrix was 3.46 μm and 3.37 μm, the microhardness was 731 HV0.2 and 736 HV0.2, and the area ratio of carbides was 11.14% and 11.02%, respectively. The dry sliding wear resistance of the cladding layer reinforced by 1.95 μm carbides was 2.76 times higher than that of the 0.49 μm carbides. The failure mechanism of the cladding layer with the micron carbides was mainly caused by plastic deformation of the cladding layer matrix, whereas that of the submicron carbides involved both the plastic deformation of the cladding layer matrix and the abrasion that was caused by the peeled carbides.

Microstructural evolution and dynamic strain-hardening in friction-induced deformation layers of 30CrMnSi steel

2019 ◽  
Vol 71 (7) ◽  
pp. 965-971
Author(s):  
Peng Zhu ◽  
Shuang Liang ◽  
Yudan Yang ◽  
Xicheng Wei ◽  
Wurong Wang
Keyword(s):  
Plastic Deformation ◽  
Strain Hardening ◽  
Microstructure Evolution ◽  
Sliding Friction ◽  
Dynamic Equilibrium ◽  
Wear Behavior ◽  
Stable State ◽  
Dynamic Strain ◽  
Wear Loss ◽  
Content Type

Purpose This paper aims to investigate the correlation between wear behavior and microstructure evolution in friction-induced deformation layers (FDL) of 30CrMnSi steel, especially the role of strain-hardening induced by plastic deformation in FDL, which accordingly alters the wear behavior. Design/methodology/approach Dry sliding friction and wear behaviors of the 30CrMnSi steel against quenched and tempered GCr15 steel were studied using a pin-on-disc tester. The microstructure, hardness and plastic deformation of FDL were investigated. Findings It was found that the evolution of microstructure and strain-hardening induced by plastic deformation were occurred in the subsurface. When the microstructure, hardness and depth of the plastic deformation layer (PDL) reached a relatively steady state, the friction process transformed into stable-state stage. The wear loss and depth of the PDL was in dynamic equilibrium at stable wear stage. Originality/value In this paper, the correlation among the microstructure evolution, the strain-hardening and wear behavior were systemically analyzed. This paper could provide a theoretical reference for optimizing the microstructure and strain hardening properties of tribo-pairs materials.

Finite Element Modeling Method of Centrifugally Rotary Processing

2019 ◽  
Vol 889 ◽  
pp. 140-147 ◽  
Author(s):  
Van Tho Nguyen ◽  
Arkady N. Soloviev ◽  
M.A. Tamarkin ◽  
I.A. Panfilov
Keyword(s):  
Plastic Deformation ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Contact Region ◽  
Abrasive Particle ◽  
Contact Problems ◽  
Normal Pressure ◽  
Temperature Fields ◽  
Dynamic Problems ◽  
Boundary Contact

In the present work, the process of interaction of an abrasive particle with the surface of a component is modeled in the framework of dynamic problems of the theory of thermoelasticity, considering plastic deformation, friction and wear of the surface in the contact region. Two boundary contact problems are considered. The first problem deals with the contact interaction of an element of an abrasive particle in the form of a truncated cone and the surface of a part. The circle of smaller diameter of the cone contacts the surface of the part taking into account the friction and plastic deformation of this surface. Kinematic or force boundary conditions are applied to the circle of greater diameter. In the case of kinematic conditions, the normal and tangential displacements of the circle and its rotation are specified. In the case of force conditions, the force and moment are given. In the second task, the hard stamp slides at a constant speed along the flat boundary of the workpiece, the value of the die insertion is set. In the contact area, the sliding friction force is expressed through normal pressure and heating due to the friction and wear. The stress and temperature fields near the contact region are investigated.

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