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Surface texture, as one of the typical surface integrity characteristics, plays a vital part in efficiently and systematically evaluating the surface integrity and relevant mechanical properties of machined parts.
Surface quality is considered to be closely related to functional performance and it shows particular sensitivity in the field of micro/nano manufacture and aerospace industry where the surface behaviors strongly affect the mechanical properties and fatigue life of parts [1-2].
Common roughness parameters are summarized here and the relationship between these surface roughness parameters and final parts fatigue properties are also discussed and studied through the quantity of surface concentration factor Kt which is a key to analyze and predict the mechanical performance and fatigue life of parts [7].
However, establishing a more accurate and direct link between surface texture parameters and the final fatigue properties is really a necessity no matter for the purpose of theorecical research or in practiacl producion appliaction.
Pilkey, D.F. pilkey: Peterson's Stress Concentration Factors(3rd edition) (John Wiley & Sons, Newyork 2008) [8] International Standard ISO 4287: 1997/Cor.2: 2005 (ISO, Switzerland) [9] D.

The main disadvantages of these cermets are their relatively poor mechanical properties and wear resistance mainly caused by their coarse-grained structure (the carbide grain size is usually over 4 μm).
Sintering temperature and time are among the most important factors determing the structure and properties of Cr3C2-Ni cermets.
Decreasing the carbide grain size allows to increase the mechanical properties such as hardness and transverse rupture strength and wear resistance [8].
a b Fig. 3. a – microstructures of Cr3C2-Ni cermets prepared by SPS; b – liquid phase sintering (2000× Mechanical properties.
Yuga, Production, mechanical and tribological properties of layered composite materials based on a chromium carbide alloy, Powder Metall.

The results of this work suggest that the Inconel 713C turbine wheel was damaged by two factors: fatigue cracking at low frequencies and grain boundaries oxidation.
The turbine wheel is the most affected element.
As far as the internal combustion engines in the private cars are concerned, nickel base superalloys offer the best combination of the mechanical properties, corrosion resistance and creep with their price [1].
Due to the competitive price and good casting properties, Inconel 713C is used is the as-cast condition.
The destruction of the turbine wheel can be attributed to both of these factors.

Therefore, research on the heat - structural properties of marine stern shaft mechanical seal has important theoretical significance and practical value[2].
The stern shaft mechanical seal materials and boundary conditions setting The stern shaft mechanical seal materials.Floating ring (static ring and the bracket) using M106H graphite impregnated with epoxy resin embedding CESTIDUR (polyethylene, polyamide, poly synthetic materials formaldehyde resin), namely the friction face is CESTIDUR material; static ring bracket adopts M106H graphite; ring adopts 3Cr13 stainless steel.The structure parameters and property parameters of bracket and static, moving ring as listed in Table 1.
Before and after the experiment system operation of the physical properties do not change with temperature.
Calculation of friction heat.In the actual operation process of mechanical sealing device, the friction heat generated at the same time in the two seal.Due to the frictional heat generation and distribution is affected by many complicated factors, the size of the friction heat are difficult to determine, heat load calculation only according to the total frictional heat.Due to the introduction of contact theory, the model of computation can be obtained in the radial position of the contact surface of the sealing pressure, which can lay a good foundation for the calculation of heat flux load, so this paper uses the following simplified formula for calculating the friction power loss[4]
Calculation of Mechanical Engineering Society of Heilongjiang province. 2002 journal, design of mechanical seal of Heilongjiang: Heilongjiang Institute of mechanical engineering, 2002:242-246

When the object has the shape feature of film or sheet the, the tensile stress generated inside will determine whether there will be damage zone; Object with the thick plate shape feature, the determinate factor would be the pressure stress and shear stress.
α b M t3 t1 t4 t2 t5 2 1 3 4 B Fig.1 geometrical factors of bolt support that two sides is thick anchorage plate Method of Quantitatively Determining the Anchorage Support Parameters Anchoring parameters include: anchorage strength (anchoring force distributed in the unit area of the two sides surfac), bolt row-to-row distance, bolt length and depth, etc.
Bolt row-to-row distance calculation The row-to-row distance is calculated according to anchoring strength and the mechanical properties of the selected bolt.
Bolt length calculation The length of bolt includes: the anchorage section, the thickness of the bolt head that affected non-overlapped area, the thickness of bolt structure, the thickness of bolt end that affected non-overlapped area, the length of exposed bolt.
The influence of bolt action force to the mechanical property of rocks, Rock and Soil Mechanics Vol. 24 (2003), p. 376-381, in Chinese

The findings suggest that optimizing these factors can significantly enhance the properties of MMSs and contribute to their durability.
Steel after heat treatment at 650 °C showed excellent mechanical and impact properties.
These changes highlight the importance of optimizing the microstructure to improve the mechanical properties of the alloys.
The heat treatment of these samples was carried out at different temperatures, which affected their resulting microstructural and mechanical properties.
Jiang, A review of key factors affecting the wear performance of medium manganese steels, Metals 13 (2023) 1152

The mechanical properties of Low Carbon Si-Mn Q&P steel are strongly affected by the conditions of heat treatment.
At the same time, the relationship between mechanical properties and microstructure was analyzed.
Q&P steel’s heat treatment technology was analyzed by microstructure and mechanical properties.
Microstructure Observation and Experiment Result Analysis Mechanical properties.
It is shown that partitioning temperature and holding time have a strong effect on the mechanical properties.

Effect of substrate bias voltage on the mechanical and tribological properties of low concentration Ti-containing diamond like carbon films Jinfeng Cui1,a, Li Qiang1,2,b, Bin Zhang2,c, Xiao Ling1,2,d, Junyan Zhang2,e* 1 School of Petroleum Chemical Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China 2 State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China acuijf@lut.cn, bqiangli1413@163.com, cbzhang@licp.cas.cn, dlingxiao014226@163.com, ezhangjunyan@licp.cas.cn Keywords: Diamond-like carbon film; Low concentration Ti doping; Substrate bias voltage; Mechanical properties; Tribological properties Abstract.
Moreover, other ion bombardment (such as re-sputtering, etching and so on) can seriously influence the properties of the film [12-13].
Hence, the bias was used to control the ion bombardment energy in order to modify the mechanical and tribological properties of the films.
The effect of substrate bias voltage on the mechanical and tribological properties of films was investigated systematically.
As a matter of fact, there is another factor to be considered.

Introduction Human knee joint is one of the most complex joints in the human body, taking into account the number of its components, their spatial geometry and their mechanical properties, the contacts between elements and the pressures acting on them.
Knee misalignment is considered one of the biomechanical key factors that influence the progression of knee osteoarthritis [3].
During the progressive stages of the osteoarthritis, the menisci and the cartilage change their structures and their material properties.
Material properties used for knee geometric components are presented in Table 1.
[mm] Healthy 800N 2.41 1.17 2.12 7.17 5.88 6.05 Case OA 800N 4.36 3.95 4.32 3.11 3.35 3.04 Healthy 1500N 4.48 3.67 4.27 9.43 7.06 7.89 Case OA 1500N 7.32 6.98 7.59 5.45 5.89 5.93 Conclusions The biomechanical behavior of human knee cartilages is important in order to understand the OA phenomenon due to mechanical factors, because it could be possible to find solutions to help people to prevent or diminish the OA effects.

The paper deals with physico-mechanical properties of the threshold coupling made of secondary raw materials, which could be used not only at newly built houses, but also at the rehabilitation and reconstruction work of existing buildings.
It consists of at least two boards of recycled polymer and allows variable connection of waterproof membrane and also variable height setting for different heights of detail, based on various thicknesses of the existing floor and other local factors.
Physical properties were measured by using a contact sensor.
The thermal conductivity coefficient of polymer materials is affected by their basic properties, which are the ratio of polymer to the added admixture, etc.
Duchacek, Polymers – production, properties, processing, applications, Institute of Chemical Technology in Prague (2006) p. 274