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Stress corrosion cracking occurs, when three factors are combined: tensile residual stress due to welding, material sensitization in the heat-affected zone, and the corrosive environment.
In other words, eliminating one of these factors might prevent from generating stress corrosion cracks, and it is expected to extend the fatigue life of nuclear reactors [3].
Because the shot peening treatment involves the combinations of many factors in the collision between shot grains and the specimen’s characteristics, and the mechanism of micro-structural transformation is also important point to consider the process’s effect.
Tables 2 and 3 show the chemical composition and the mechanical properties of HT780, and Figure 2 shows the stress-strain curve of HT780 [9].
Table 2 Chemical compositions of specimen (HT780) Table 3 Mechanical properties of specimen (HT780) Fig. 2 Stress-strain curve of HT780 When the residual stress distributions were evaluated, the block-type specimen of 49 mm length, 28 mm width and 5 mm thickness was used.

Ultrasonic testing uses transmission of high frequency sound waves into a material to detect imperfections or to locate changes in material properties.
Hosur et al. (1998) Investigated ultrasonic through-transmission or pulse-echo techniques rely on the use of high-frequency mechanical oscillations for the detection of damage mechanisms; by measuring the signal amplitude and/or the time-of-flight of the ultrasonic signal the location and size of the defects can be estimated.
Therefore, it is not only the energy but the velocity and the mass which are the decisive factors affecting the response of a laminate.
[5] Zongjie Cao, Huaidong Chen, Jin Xue, Yuwen Wang (2005) Evaluation of mechanical quality of field-assisted diffusion bonding by ultrasonic nondestructive method.

Introduction The development of modern constructional materials with specified functional properties implies the need for a detailed study of the physical-chemical properties of suspensions derived from nanoscale materials of various nature.
Also, the molecules of sulfonaphthalene formaldehyde, concentrating in the surface layer of CNTs, form gel-like films from the radicals of the backbone chain (6), which have enhanced structural-mechanical and hydrodynamic properties, which ensures the stabilization of CNTs.
Films, possessing mechanical strength and elastic properties, prevent aggregation and fusion of particles as they approach each other, and thus cause a structural-mechanical factor of aggregative stability [14-15].
When considering the stabilizing effect of a plasticizer on a CNTs suspension, it is noted that the stabilization of nanotube particles is also achieved due to both electrostatic and adsorption-solvate factors of aggregative stability.
Vysotskaya, Influence of carbon nanotubes on the properties of polymer-bitumen binders and asphalt concrete, Vestnik MGSU. 11 (2015) 110-119

In the simulation, three main factors such as an intersecting angle of Ф = 90°, 100°, 110° a 120°, outer corner angle R (ψ) and inner corner angle (r) were being varied.
INTRODUCTION Ultra-fine grained materials are currently of great interesting due to their unusual mechanical and physical properties [1-5].
Outer corner angle ψ (or outer radius R) is a next parameter significantly affecting the distribution of plastic deformation in a sample.
[8] Matvija, M., Fujda, M., Milkovič, O., Kvačkaj, T., Vojtko, M., Zubko, P., Kočiško, R., The effect of ECAP and subsequent Post-ECAP annealing on the microstructure and mechanical properties of AlSi7Mg0.3 alloy.
Effect of die parameters and material properties in ECAP with parallel channels.

Wind turbines suffer much environmental interference; moreover, data-based fault prediction is vulnerable to occur false alarms by the impact of these factors.
So this paper presents a fault prediction method for the pitch-controlled system, which is based on the mathematical model of wind turbines physical properties.
Fault statistics can be seen from from domestic and foreign wind turbines[1,2], pitch system is one of the high incidence of fault mechanical components.
In view of the above analysis, this paper presents a fault prediction method for the pitch actuator, which is based on the mathematical model of wind turbines physical properties.
The model parameters rather than the operating parameters of the system parameters are utilized, which effectively reduces the impact of environmental factors and the input change.

So mastering the dynamic distribution law of temperature field in the process of sintering gauge for the reasonable control of laser sintering forming process, and improving the mechanical properties of the sinter forming is of a practical guidance meaning by powder sintering temperature field simulation experiment.
(3) (4) Thermal conductivity of powder bed is the decisive factors in laser sintering, which is determined by the above formula.
Selection and load of laser heat source, thermal physical property parameters calculation of composite powder, and the set of boundary conditions are the main factors wood powder /PES composite powder SLS forming.
The gap of sintering part is big, causing the decrease of sintering parts mechanical properties and dimensional accuracy.
Laser power is too large , sintering temperature is high, local sintering areas produce burnt phenomenon, powder of sintering parts size edge melt and bond surface of sintering parts, also causing the mechanical properties of sintered parts and dimensional accuracy.

Theformer two factors eliminate adsorptive gas and impurities on surface of the power particles and the latter two promote sintering [12]; (2) Joule heating sintering mechanism: T.
In fact, most of the reported mechanisms of the SPS sintering process are close relationship with the pulse current which plays an important factor affecting the sintering.
Teramoto, et al., Microstructures and mechanical properties of titanium/biodegradable-polymer FGM for bone tissue fabricated by spark plasma sintering method, J.
Jiang, Effect of sintering temperatures on the room temperature properties of Al90Mn8Ce2 alloys, J.
Andersen, et al., Effect of spark plasma sintering (SPS) on the microstructure and mechanical properties of randomly packed hollow sphere (RHS) cell wall, Mater.

Modal testing is a form of vibration testing which is able to determine the Frequency Response Function (FRF) of the mechanical test structures.
Nowadays, Finite Element Analysis Method (FEM) widely used for stability simulation and prediction [8-10]. [11-12] also agreed both the finite element simulations and experimental measurements reveal that the linear guide with different preload greatly affects the vibration behavior and milling stability agrees well with the cutting tests.
The properties of cutting tool were inserted into analysis process, which is made of Tungsten with several properties.
Besides, a few factors that can lead to an accurate FEA include incorrect estimates of material properties, masses, stiffness, and boundary conditions.
Acknowledgement The authors would like to thank the Faculty of Mechanical Engineering in Universiti Malaysia Pahang (UMP) and Universiti Malaysia Pahang for financial support under RDU110316.

The first type usually has a low frequency and does not affect the product surface quality.
The coefficients (k2) and (c2) define the elastic and damping properties of the rolls and their interaction between work roll and backup roll.
These constants were calculated after linearization of nonlinear properties around the steady state rolling condition.
Parameters for mill stand configuration and material properties in this research were taken from Johnson and Qi [15] and are listed in the following tables.
It is found that, the elastic properties of the strip out of the roll gap have essential effect on chattering of the stand.

The influence of rare-earth masterbatch’s content and knitting technologies on the properties of DTY fibers with porous superfine-denier is also particularly discussed.
Figure 2 The morphology of superfine-denier fiber (A) and normal fiber (B) Table 1 The influence of masterbatch on the mechanical properties of Nylon 6 POY fiber In addition to the influence of rare-earth content on the spinning process, other parameters, such as the spinning temperature, oiling agent concentration, quenching unit and spinning speed, etc., could affect the spinning process and the fiber properties as well.
All of above the parameters could influence the process and the properties of the DTY fiber, especially for that of the porous superfine-denier DTY fiber.
Here, the effect of draw ratio on the process and properties is discussed in details.
The draw ratio is usually determined by the elongation at break of the POY fiber, which directly affects the physical and chemical properties of DTY fiber, such as the fineness, breaking strength, elongation at break, crimp percent and curling stability.