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It was found that although the grain size is a prime microstructural parameter determining mechanical strength, second order factors such as grain size distribution and distribution of grain boundary misorientation angles also play a significant role.
Introduction Aluminium alloys play a key role in modern engineering due to their good corrosion resistance, relatively high mechanical properties and low weight [1,2].
For many industrial applications higher and higher mechanical properties are required, which in most cases exceeds the values possible to obtain by conventional coarse grained aluminium alloys.
All these microstructural factors will affect mechanical behaviour of UFG and nanostructural materials.
Only the sample after ECAP has a slightly worse combination of these properties.

The Q factor can be extracted from hamonic spectra after modal analysis, and the amplitude of Q factor was about 105.
Another important parameter is the Q value of the resonator [3], which affects the stability and use of the device.
Q factor.
This means that the performance of the device depends almost exclusively on the vibration structure, and mechanical properties such as microstructure geometry, material properties, etc.
In fact, the accuracy of the Q value thus obtained is greatly affected by the frequency interval in the harmonic response analysis.

Selected levels for input factors Input factors Level 1 Level 2 Level 3 Tool rotational speed (rpm) 300 400 500 Traverse speed (mm/min) 10 20 30 Tool plunge (mm) 2.7 2.8 2.9 All dimensions in mm Fig 1.
Grey relational grade plot of input factors level-wise Fig 3.
Yurzhenko, Structure and properties of the welded joints of single-type polyethylenes formed under the action of constant magnetic fields, Materials Science, 53 (2017) 186-193
Czigany, Effect of welding parameters on the heat affected zone and the mechanical properties of friction stir welded poly(ethylene-terephthalate-glycol), Journal of Applied Polymer Science, 125 (2012) 2231-2238
Shishavan and Richard Eungkee Lee, Mechanical properties of friction-stir-welded polyamide sheets, International Journal of Mechanical and Materials Engineering, 10 (2015) 1 - 8

With the development of materials, the polyurethane as a new kind of high–performance material with its superior mechanical properties is widely used in marine engineering, ocean engineering and civil engineering.
Example design In order to research the mechanical properties of PFDSST members under axial compression, the author has divided all the members into four categories which are SPa, SPb, SPc, SPd.
(a) SPa (b) SPb (c) SPc (d) SPd Fig. 1 N–ε cures of four categories Influence factors Influences of hoop coefficient on mechanical properties of members.
Influences of slenderness ratio on mechanical properties of members.
Research on The Mechanical Properties of Polyurethane Filled Steel Tube under Axial Load.

Degradation of the gas turbine hot-gas-path components, the 1 st stage blades and vanes, serviced for a period was evaluated by measuring the mechanical properties.
The mechanical properties of the serviced blades were degraded by about 30% comparing with those of unused ones.
These factors might be affected by service conditions [5].
Degradation on the blades were tested by measuring the mechanical properties and the microstructural changes.
Results and discussion Blades. 1) Mechanical properties.

However, their combination is challenging due to their significantly different thermo-mechanical properties.
The chemical composition and some thermo-mechanical properties of the materials are given in Table 1.
Song, Influence of welding parameters on interface evolution and mechanical properties of FSW Al/Ti lap joints, Journal of Materials Science & Technology 35 (2019) 1543–1554
Song, Dissimilar friction stir welding of AA6061 and Ti6Al4V alloys: A study on microstructure and mechanical properties, Journal of Manufacturing Processes 48 (2019) 119–126
Fuji, Factors dominating joint characteristics in Ti – Al friction welds, Science and Technology of Welding and Joining 7 (2002) 149–154.[1] M.

Mechanical properties of two stoichiometric NiAl intermetallic alloys processed by hot hydrostatic extrusion were investigated.
The last way is based on the fact that the mechanical properties of a single crystal of NiAl are very anisotropic in spite of its high symmetry, cubic (B2) structure [4].
Mechanical properties of as-extruded materials.
Mechanical properties of as-annealed materials.
Summary Mechanical properties of the polycrystalline stoichiometric NiAl at room temperature depend strongly on its texture.

Simulation of Cracks in Fiber Reinforced Composite Plate Pramod Kumar1a, Ashish Kakyal 2 1 Department of Mechanical Engineering Dr B R Ambedkar National Institute of Technology, Jalandhar, India 2 Department of Mechanical Engineering Dr B R Ambedkar National Institute of Technology, Jalandhar, India 1a kushwahapramod@nitj.ac.in Keywords: Glass fiber composite; Strain energy release rate; Cracks; stress intensity factor Abstract.
Micro mechanical approach is used for modelling the crack in composite materials.
Material properties chosen for a glass fiber reinforced epoxy composite given in Table 2[8].
Table 2 Basic properties of GFRE constituents Properties E-Glass fiber Epoxy E(GPa) 72.4 2.76 G(Gpa) 30.2 1.02 υ 0.2 0.35 Loss factor 0.0018 0.015 Fig. 2 Von misses stress contour of composite Fig. 3 Deformation of composite RVE.
(iv) The matrix crack affects the damping of the glass fiber epoxy composite.

Such a material has its own properties that differ from the properties of its components.
In terms of density, i.e. according to the type of pressing, the boards differ in physical and mechanical properties.
As a result, it acquires new properties such as resistance to mechanical and temperature influences.
It is considered to be one of the most sensitive methods that depicts or describes individual mechanical properties of materials.
Thachil, Study On The Properties Of Epoxy-Wood Ash Composites: Mechanical Properties, Thermal Properties and Dynamic Mechanical Properties, Volume 72 (2023) 3100-3103

In FSW process three zones develop [2]: Heat Affected Zone (HAZ), Thermomechanically Affected Zone (TMAZ) and Weld Nugget Zone (WNZ).
The geometry, the thermocouples position, the material properties are presented in Fig. 5 and Table 1.
AA2014-T6 material properties [2].
Material Properties AA2014 -T6 HS Steel Tool Thermal conductivity, K (W/mK) 155 20 Yield stress at room temperature, (MPa) 400 - Yield stress at FSW temperature, (MPa) 12 - Onset melting temperature, Tm (ºC) 507 - (a) (b) Figure 6.
Effect of rotational speed (a), translational speed (b) and stick factor (c) on the temperature distribution.