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The review end with the discussion about critical factors and suggestions to incorporate nanocomposites into AM to get functional 3D printed parts.
For example, the viscosity of a UV-curing resin can affect the mobility and dispersion of NP which can lead towards lack of dispersion and affect overall desired properties.
The lower cross linking density leads to poorer mechanical properties.
MWNTs enhanced the mechanical properties (except tensile elongation at rupture), thermal stability, and electrical conductivity properties of the PA11.
Furthermore, the sensors can be easily printed in different geometries, expanding their utility to wearable form factors.

In addition, the AM parameters will affect the weld bead size, thus affecting the path planning of the forming process.
Mechanical and oxidation properties of Ti-xFe-ySi alloys, Mater.
Microstructure and mechanical properties of wire and arc additive manufactured Ti-6Al-4V, Metall.
Characterization of microstructure and mechanical properties of laser melting deposited Ti-6.5Al-3.5Mo-1.5Zr-0.3Si titanium alloy, Mater.
Williams, Paul Colegrove, Microstructure and mechanical properties of wire and arc additive manufactured Ti-6Al-4V, Metall.

Discuss the amount of initiator, the molar ratio of monomer, reaction temperature, which the influence on the properties of the polymer.
Through the infrared spectrum, thermo-gravimetric analyzer, viscometer, such as instrument on its microstructure and properties were characterized.
Table 1 The factor levels table of orthogonal experiment Factors level A B C D E (NH4)2S2O8(ml) NaHSO3 (ml) Ratio of monomers AMPS:DMAA Reaction time(h) pH value 1 1.3 0.5 3:2 0.8 8.5 2 3.0 1.3 3:1 1.0 10.0 3 4.6 2.6 2:2 1.5 11.0 4 6.9 3.9 2:1 2.0 12.0 By 16 sections orthogonal, we can get the best conditions of polymerization is A3B4C1D3E3 from the average size of the various factors.
Every kind of factors is important influence factors of the novel fluid loss additive, so we should optimize the individual factors to obtain the most economic and effective solution.
[7] Jinku Xie, Xin Zhao, Jinchun Sheng, Xiang Guan, Synthesis and Properties of High Temperature-Resistant Starch Filtrate Reducer for Drilling Fluid.

In addition, the factors affected the runoff and response of soil moisture on the runoff coefficients was also discussed.
Introduction The rainfall-runoff process is an important component of the hydrologic cycle, the hydrological response of watershed to the rainfall is determined by several key factors controlling the runoff formation.
In arid and semi-arid areas, in addition to the spatio-temporal variability of rainfall, surface conditions, such as crust, vegetation type and terrain characteristics were the main factors affecting the runoff [8], and the sensitivity of the initial moisture content to the rainfall-runoff process was related to the runoff mechanism [9].
Table 1 Basic physical and chemical properties of soil in the experimental base Saturated moisture content Field capacity Wilting points Saturated hydraulic conductivity Mechanical composition (%) [m3/m3] [m3/m3] [m3/m3] [mm/min] <0.002 0.002~0.02 >0.02 0.392 0.256 0.134 0.013 11.8 25.8 62.4 Table 2 Date of rainfall and designed rainfall intensity Wheat Green- turning stage Middle stage Late stage Wheat-stubble land Precipitation date 20/04 09/05 15/06 23/06 15/07 03/08 Rainfall intensity [mm/min] 0.45 0.75 0.42 0.75 0.49 0.72 Results and discussion Surface runoff process The rainfall-runoff process of wheat was shown in Fig. 2.
The long and slow recession process was also slightly affected by slope angle.

The environmental factors included dry and wet cycles of saltwater, the coupled action of freeze and thaw cycles and dry and wet cycles.
The single and multi-factor coupling effects of the main marine environmental factors such as saltwater immersion, dry and wet cycles in saltwater, freeze and thaw cycles were also considered.
Tab.1 Material properties of a resin Tensile bonding test Tensile test Compression test Bonding strength / MPa Tensile strength /MPa Elastic Modulus / MPa Ultimate strain / ％ Compression strength /MPa 3.62 40.6 2080 2.2 81.5 Tab.2 Tensile properties of CFRP sheet (UCP—200g) Cross-sectional area /mm2 Tensile strength / MPa Elastic Modulus / 105MPa Ultimate strain / ％ 1.665 4430 2.54 1.7 RC column specimens were square-section reinforced concretes with dimensions 100mm×100mm ×400mm.
(4) External environment affected the bearing capacity of columns, and multi-factor coupling effects were more than a single factor effect
But the durability performances of CFRP sheets and concrete were the key factors.

In the present work, the link between the microstructural factors and the susceptibility to inter-granular high temperature creep failure is considered.
Indeed inter-granular creep cracks have been observed in the heat affected zones (HAZs) of thick section weldments in high carbon austenitic stainless steel headers [2].
This confirmed the methodology of our previous study about the influence of thermo-mechanical history on grain boundary fracture [1].
The present work demonstrates that these two factors have a detrimental influence on creep ductility, although the quantitative assessment of these two factors was not established yet.
Spindler, Effects of multiaxial stress state and microstructure on creep properties of austenitic stainless steel, Int.

Palmiere3,c 1 Department of Mechanical Engineering, Institut Teknologi Nasional, Bandung, Indonesia Jl.
It is well-known that the mechanical properties of tool steel are strongly correlated with the carbides.
According to Boccalini and Goldenstein [1] the type, morphology and volume fraction of eutectic carbides were the important factors in contributing the mechanical properties of tool steels.
Peidao [3]studied the Fe-Mo-C alloys and the result showed that the as cast microstructure including carbide formation related to diffusivity of alloying elements and thermodynamic factors.
Peidao et.al [4] also found the alloy composition of the high speed steels affected the difference in morphology of eutectic carbides.

The side length of the cubic specimens (represented with a) are three kinds of 100,150 and 200 mm, also the impact of factors of porosity and coarse aggregate size of concrete are studied.
Values in table 4 do not have the statistical properties due to the small number of samples, great discreteness of material and change of Cv with a variety of factors, however, there is a certain degree of rules in the data.
There is a certain correlation between these two factors and the impact of size on strength.
Experimental Study on Size Effect of Mechanical Properties of Large Size Fly Ash Concrete, Proc.
BARRAGÁN, Variability of the Bond and Mechanical Properties of Self-compacting Concrete, Volume 1, Number 1 (March, 2008) pp. 31-57.

However, it is commonly believed that the fracture toughness is affected by the constraint effects.
The parameters α and k are dependent on the material properties and the fracture mechanism.
The GCF and T11-stress are affected by the size and integrity of the stiffeners.
It can be seen from Fig. 4 (a) that the size and integrity of the stiffeners have important influences on fracture toughness, the reason can be explained by the fact that T11-stress is dependent on these factors.
Dai, Crack arrest behavior of central-cracked stiffened plates under uniform tensions, International Journal of Mechanical Sciences, 133 (2017) 704-719

The certain properties of alloy layer are higher than the substrate, so achieve the purpose of surface modification treatment [1, 2, and 3].
Low carbon ductile iron has low cost, use scrap steel as raw material; in the cast state, low carbon ductile iron can get excellent comprehensive mechanical property, its tensile strength can reach 854MPa,and has certain toughness and plasticity; low carbon ductile iron has superior machine performance, cutting strip is ribbon, similar to the steel scraps[6].
But the temperature gradient G is the maximum, so shape control factor G / V tends to be infinite, solidification structures only grow in low-speed flat.
The transition zone and heat affected zone.
Fine structure, highly dispersed carbides and the existence of a large number of dislocations, the microstructure of laser transformation hardening has more excellent properties than conventional quenching.