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While there are many factors affecting forming accuracy including powder’s physical and chemical properties (powder particle size, composition, and fluidity), laser and machine tools’ characteristics (laser power, scan spacing, scan speed, sinter thickness, and the preheating temperature).
Analysis of the influncing factors for the parts’ precision and desity Laser sintering is a thermal process which uses laser to heat materials, so sintering temperature is one of the main factors affecting the accuracy of SLS parts.
A better thickness should be selected according to the materials’ particular size, thermal properties and etc.
When the scanning speed increases, the error may continually decline; this will be opposite to the affecting trend of laser power on the parts’ properties.
There are many factors affecting the density and accuracy of laser sintered parts.

Hence there is a large scope seen in enhancing the mechanical properties of 5086-O in the interest of its industrial applications.
Vickers hardness test and tensile tests of base material and friction stir processed material was performed at room temperature for evaluating mechanical properties.
Fig. 3 Color coded orientation maps (a) As received condition (b) Single pass FSP (c) Multipass FSP (d) Inverse pole fig. key Mechanical properties Hardness.
Fig. 4 Hardness in the NZ centre for as received and friction stir processed condition Fig. 5 Mechanical properties in the as received and friction stir processed condition Tensile Properties.
The results reveal an increase in yield and ultimate tensile strength of FSP material for both type of processing than the as received material, grain refinement looks to be the dominant factor for the increase in strength properties [11].

Introduction On the properties of the connector in the welding process influenced many factors: the physicochemical properties of welded materials arising from their chemical composition and structure, the used technologies, equipment and consumables.
The high temperature mechanisms adversely effects on the mechanical properties of the obtained joints.
These factors make this, that the welding technology MIG, MAG gas-shielded must consider limiting heat input arc.
The method allows for fast, precise reduction of weld-faces temperature, a positive influence on its structure (grain refinement) and improves its mechanical properties (especially toughness).
Majewski, Tribological properties of Super Field Weld with Micro-Jet Process, Adv.

Effect of Fiber Coating on Properties of Ni-MF/Al2O3 Composites Luhao Liu, Zhi Wang*, Guopu Shi, Yan Ma, Shuai Feng and Chao Wu School of Materials Science and Engineering, University of Jinan, Jinan 250022, China * Correspondening author: wangzhi@ujn.edu.cn Keywords: Ni; Mullite Fiber; Al2O3 Coating; Mechanical Properties Abstract.
Given the characteristic of the Al2O3 coating, a series of factors are taken into consideration so that the transition layer can do well in combining fiber and matrix.
Mechanical Property Analysis of Composite.
Through the design of orthogonal test, the mechanical properties of MF-Ni/Al2O3 composite were studied with the addition of MF and Ni.
At the same time, Ni phase can serve as the second phase in order to improve mechanical properties of composites.

Finite element method was used to calculate stress intensity factors by ABAQUS software.
Stress intensity factors from residual stress with and without bonded retarders were calculated and compared.
Effects of bonded retarder on stress intensity factors were calculated.
Fig. 3 Residual stress intensity factors at each crack length Fig.4 illustrates the stress intensity factors curve with crack length when the load is applied.
So it’s important to control the welding position and welding process for enhancing damage tolerance properties.

Results indicate that lubrication significantly affects friction factors, with oil to black graphite performing the best, yielding a friction factor of 0.15.
The heat generated due to friction might lead to undesirable material property changes and affect surface finish.
Material and Experimental Procedure Material Properties.
The experimental results indicate that the lubrication significantly affects the friction factors and dimensional changes in the ring samples.
Furthermore, it is noteworthy that Oil to Black Graphite exhibited the lowest friction factor at 0.15, suggesting its superior lubrication properties.

Mechanical Properties.
The mechanical properties of the PBIA fibers were significantly enhanced during the annealing treatment.
Orientation is an important parameter to determine the mechanical properties of fibers.
The enhanced mechanical properties are usually linked to a higher degree of orientation.
Looi, Effects of heat treatment on the mechanical properties of Kevlar-29 fibre, Compos.

High-strength, low-alloy (HSLA) steels are widely used in the automotive and oil industries due to their good mechanical properties and weldability.
The selection of the welding process depends on several factors, including the quality of the weld bead and the production capacity.
The selection of the welding process for the manufacture of components such as automotive wheels depends on several factors, including the quality of the weld bead and the production capacity.
The performance of the welded joint is affected by metallurgical changes, different mechanical properties in the regions of the weld bead, discontinuities, residual stresses and complex stress states related to the joint geometry [2, 3].
Honeycombe: Steels Microstructure and Properties (Elsevier Butterworth-Heinemann, United Kingdom 2006, 3rd ed)

The results showed that the counterface roughness is the most significant factor in affecting the wear rate, followed by applied load, sliding speed, and fiber loading.
The ANOVA is to investigate which control factor significantly affects the tribological properties of the composites.
This shows that the number of yarn reinforced into the polymer matrix is important in affecting the frictional contact between composites and the sliding counterface.
This can be attributed to the increase in composite’s surface mechanical properties with the increase of fiber loading and different properties of transfer layer materials produce during wear process.
Mi, "Bamboo fiber-reinforced polypropylene composites: A study of the mechanical properties," Journal of Applied Polymer Science, Vol. 69, (1998) 1891-1899

When the experiment has been carried out constant and variable technological factors have been determined and the impact of these factors on the values of mechanical properties has been observed: Constant technological factors: · liquid alloy temperature: 700°C · mold temperature: 220°C · plunger pressing velocity: 2,6 m.s-1 · pressing chamber diameter: 70 mm · height of metal rest inside a pressing chamber: 25 mm Variable technological factors: · increase pressure: 10; 15; 20; 25 MPa The impact of the increase pressure cavity on the value of mechanical properties has been verified on experimental samples (fig. 1) cast on a die casting machine with horizontal cold pressing chamber Müller Weingarten 600.
Fig. 4 to Fig. 6 represent individual shapes of relations between selected mechanical properties and studied casting parameters.
Table 2 Reached results of studied mechanical properties Studied technological casting parameters Studied mechanical properties measured values Permanent deformation „s“ [mm] Porosity „f“ [%] Hardness „HB“ Increase pressure [MPa] No.
The casts made under higher pressure during hardening present better mechanical properties with the lowest porosity proportional rate.
Pasko: Influence of technological factors of die casting on mechanical properties of castings from silumin, Lecture Notes in Electrical Engineering, Vol. 240, 2013, p. 713-722 [4] P.