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Small amounts of various alloying elements were added to a high strength Al-Zn-Mg-Cu alloy and their effects on the microstructure, mechanical properties, and casting characteristics were investigated.
Experimental To investigate the effects of alloying elements on the mechanical properties, plate-shaped castings (60x100x24mm) were fabricated in the metallic mold.
Solidification range that is known as an important factor affecting castability remained almost unchanged by Zr or RE additions.
Although there are various parameters affecting hot cracking phenomena in casting processes, two of the most important parameters should be the amount of last freezing liquid and the freezing range because the stress on the solidifying body has to be accommodated by a grain boundary displacement and this movement is facilitated by available liquid [4,6].
Tensile properties of heat-treated alloys Fig. 6.

However, the formability of tapered part was restricted by many factors, such as mechanical properties of metal, blank holding force (BHF), drawbead resistance, friction coefficient between die and blank, etc.
The detailed mechanical properties of material are listed in table 1.
Actually many factors should be considerate in the forming process as analyzed above.
Factors and levels of the experiment are given in table 2.
Especially, the drawbead resistance and friction coefficient affect more on the forming performance than the other factors according to the simulation result.

The curing characteristics, mechanical properties and morphology of these compounds were investigated and compared with those of the original compound.
A fill factor of 0.7 and constant rotor speed of 60 rpm were used.
Physical Properties.
The main reasons for the influence on the mechanical properties are inhomogeneities in the blend, migration of curatives and contaminations in the feedstock for the D-GTR.
If these problems are overcome, a considerable amount of D-GTR can be added to the original compound without significant loss in properties.

Final user properties of concrete and other silicate composite structures are conditioned by their early-age history.
Introduction Over the past few decades a number of studies try to develop a computational model of hygro-thermo-chemo-mechanical behaviour of cement-based composites where the cement particles, activated by water, make the structure of cement paste matrix.
The diffusion factor of the hydrate layer for water is affected by the tortuosity of gel pore and the radius of gel pore in hydrate.
However, the composition of cement affect on the rate of hydration significantly because clinker minerals, such as alite (C3S, typically 65% of the total mass in the Portland cement), belite(C2S, 15%), aluminate (C3A, 7%), ferrite (C4AF, 8%), have their own reactions with water.
Since some aspects of such multi-component hydration process have not been cleared yet, all quantitative predictions contain some phenomenological factors, coming from macroscopic observations and measurements.

Finally, with the material fatigue property and some uncertainty factors, carbody fatigue damage distribution and life was calculated and evaluated.
There are many factors which affect the fatigue properties of high speed railway vehicle structural components, but there are three main factors: the material properties, the load time histories, and structural geometrical features.
These factors also easily lead to the generation of structural failure.
The structural components welded quality, manufacturing process are another factors which led the structure failure and destruction.
Quasi-static stress method is adapted for most of the mechanical systems.

The weld characteristics were designed as spot welds using a U-bending type simulation, considering factors influencing cracking, such as residual stress levels of 154 MPa and 220 MPa, and welding durations of 3 and 6 seconds.
Table 2 Mechanical properties of JIS G4404 SKD 11 [14] Parameters Details Yield strength 154 MPa Tensile strength 231 MPa Elongation 56 % Fig. 4 Schematic an illustration of experiment Fig.5 Position of checking weld crack The weld cracking was verified by liquid penetrant testing (PT), and eddy-current testing (ECT) for seeking the crack depth when compared with the reference standard block.
The results indicate that the welding process alters the microstructure of the material due to thermal influences, which subsequently affects its mechanical properties.
Among the factors studied, welding time emerged as the most critical parameter affecting crack formation when compared to residual stress levels.
[5] Wenchen Xu, et al., Combination of eddy current and heat treatment for crack healing and mechanical-property improvement in magnesium alloy tube, Journal of Magnesium and Alloys 9 (2021), pp. 1768–1781

In the process of calculating reliability index, the factors such as size, assembly error, and space environment influence have been taken into consideration, and the method of MFOSM (Mean First Order Second Moment) has been applied.
The main influencing factors have been analyzed and the improvement has been put forward.
It directly affects the attitude stability of the mast expansion and even affects whether or not the satellite mission will be successful [4].
The Determination of the Probabilistic Properties of Velocities & Accelerations in Kinematic Chains with Uncertainty,Transactions of the ASME,1991,113(3):84-90
Harbin Institute of Technology, Mechanical design and theory,2009.

Rapid degradation can deteriorate the mechanical strength and generate a significant amount of hydrogen gas via corrosion in physiological environments, negatively affecting bone healing and the surrounding tissues.
These analyses are performed across different combinations of laser process parameters, with the specific goal of enhancing corrosion resistance, biocompatibility, and mechanical properties. 2.
The crystallographic texture significantly influences surface energy, consequently affecting the corrosion behavior of Mg alloys [16].
Conclusions WE43 Mg alloys show great potential in biomedical implants, attributed to their biodegradability, biocompatibility, and mechanical properties.
LSM has emerged as a promising solution to enhance surface-dependent properties crucial for biomedical implant applications.

In some cases are often required unique material properties.
However, different material properties of matrix and reinforcing phase cause problems during conventional machining, such as delamination of composite and rapid tool wear.
However, different mechanical properties of each compound in composite material is challenging to machine.
Producer determine following mechanical properties: modulus of elasticity 21 GPa, tensile strength 190 MPa, yield strength 140 MPa, density 1,850 kg.m-3.
Machine tool load was not affected in this case

As the heart of the aircraft, aircraft engine is the decisive factors of aircraft performance.
All these properties mean that it will produce a higher and more concentrated cutting force when the blades are being machined then generate cutting vibration.
The main factors affecting the deformation are as follow
(1) The impact of impeller blade material and structural properties on processing deformation.
To sum up, different processing routines will produce different work-piece deformation for the same material and structural properties because of complex interaction of these factors