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Precipitation hardening is by far the most effective way for increasing the mechanical strength of aluminum alloys.
The resulting mechanical properties of the age hardenable aluminum-magnesium-silicon alloys (6xxx series) depend strongly on the precipitation hardening mechanism.
Best mechanical properties are achieved by metastable precipitates of the fully coherent β''- and the semi-coherent β'-phase.
The stable β-phase has generally a negligible influence on mechanical properties.
The results illustrate the significant loss in strength near the fusion as well as heat affected zone (HAZ).

Introduction AA6061 is considered to be one of the most common aluminum alloys for general purpose use due to its good mechanical properties.
Hara, Effects of environmental factors on atmospheric corrosion of aluminium and its alloys under constant dew point conditions.
Nayeb-hashemi, The effect of pH on the mechanism of corrosion and stress corrosion and degradation of mechanical properties of AA6061 and Nextel 440 fiber-reinforced AA6061 composite.
Hack, Structural, mechanical and corrosion resistance properties of Al2O3–CeO2 nanocomposites in silica matrix on Mg alloys by a sol–gel dip coating technique.
Farzaneh, A ZnO-based nanocomposite coating with ultra water repellent properties.

Advances in electronics and electrical engineering now enable measurement and analysis of the specimens being tested and evaluating their material properties.
In civil engineering, investors and designers constantly require better properties of building materials, especially those properties that guarantee the material’s quality.
Great caution must be taken during the design of the composites because their final physico-mechanical properties are determined by the properties of the components and their uniform distribution.
Some studies show that the final distribution of the fibers is affected by the placement process [6, 7].
The properties of fresh SFRC are measured by standard tests, identical to those used for testing ordinary concrete, i.e. the set of standards ČSN EN 12350 [8].

Application of Wavelet-based Fractal Dimension Threshold Denoising Method to Load Time History of Engineering Vehicle Yingshuang Zhang1, a, Guoqiang Wang1,b , Jixin Wang1,c and Lijuan Yang1,d 1 College of Mechanical Science and Engineering, Jilin University, Nanling Campus, Changchun, China ayingshuangz@jlu.edu.cn, bwgq@jlu.edu.cn, cCorresponding author: jxwang@jlu.edu.cn, d948756904@qq.com Keywords: Engineering vehicle, Load time history, Fractal dimension, Wavelet, Denoise.
It is unavoidable that the measured signals could be polluted by the interference from transmission, channel noise and external environment factors.
Since the wavelet transform is a time/frequency analytical approach, which has multiresolution analysis property, it could identify the abrupt change features and noise efficiently.
The threshold estimation was affected by the length of signal [4].
In order to overcome the problems, Pan, Zhang [5] provided an intuitive selecting method of threshold, which was impacted by anthropogenic factors.

The Influence of Rolling Schedule on the Dynamic Properties of Accumulatively Roll Bonded Nano-Layered Cu-Nb Ellen K.
Due to differences in the mechanical properties of the component layers, multilayer composites are comprised of periodic heterogeneities that can produce impedance differences at the interfaces [10-15].
Each iteration resulted in a doubling of the number of layers in the composite and a factor of two reduction in individual layer thickness.
Results Dynamic experiments were conducted to examine the effect of rolling schedule induced microstructures on the dynamic properties of the Cu-Nb nanocomposite materials.
To understand how this difference in processing affected the dynamic properties of such materials, the differently processed ARB nanocomposite structures were subjected to plate impact loading.

The hydric properties of this zone can be assumed to be different from the inner concrete, with a higher porosity and higher permeability.
For these reasons scientists have studied the influence of specimen size on several properties of concrete and among them drying shrinkage.
Thus, the largest specimen was relatively less affected by the drying depth and its kinetics of drying were slower.
The depth was actually not affected by specimen size
Kreijger, “The skin of concrete Composition and properties,” Mater.

While the geometrical features of human faces are freeform surfaces with complex properties, it is the fundamental requirement for the model to have the ability of representing both primitive and freeform surfaces.
The other important properties of the B-Spline basis function are also shown in Eq. (1).
This is called local support property which means the shape of the curve is only affected by a certain number of control points.
It can be changed freely by either control points or weights factors.
Compact robot face with simple mechanical components.

The results demonstrate that the material properties of TRIP600 and DP600 are noticeably influenced by the pre-strain when the strain rate was over 1/s.
And this pre-strain will affect the dynamic tensile properties of sheet metals when car crash occurs at high strain rates.
In this study, the dimension of specimen was selected from the finite element analysis result considering the shape factors to induce the uniform deformation[12].
The material properties of TRIP-type and DP-type sheets were obtained from the static test as shown in Table 1.
This result informs that the material properties of TRIP600 and DP600 are noticeably influenced by the pre-strain at the intermediate strain rate.

Analysis of organic pollutants from biologically treated coking wastewater in a multiple barrier method Huiqin Zhang1,2,a, Chunsong Ye1,b, Fan Yang1, Xian Zhang1, Hong Yang3,c and Guangrong Liu1 1School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China 2Hubei university of technology, Wuhan 430068, China 3CSIC Environmental Engineering Co.
Table 1 The properties of coking wastewater biologically treated pH COD (mg/L) TOC (mg/L) Turbidity NH3-N (mg/L) Total hardness (mg/L) 7.70 790.0 129.1 151 112.6 696.4 2.2 Materials and instruments The solutions were prepared with FeCl3 (AR, ≥99.0%), APAM (AR, ≥85.0%), FeSO4·7H2O (AR, ≥99.0%), H2O2 (AR, 30%, w/w), CH2Cl2 (AR, ≥99.5%) provided by National Pharmaceutical Group Chemical Reagent Co., Ltd (Shanghai, China).
Results and discussion 3.1 the CF process FeCl3 and APAM were selected as coagulant and organic polymer coagulant-aid in the CF process[12]. the purpose of this experiment is to investigate the effect of the coagulation elixir on the COD removal of coking wastewater (Fig. 1), the optimized concentration of APAM was fixed to 0.8 mg/L discussed by single factor experiment, the Fig. 1 showed that 320.0 mg/L of FeCl3 solution with the pH value approached to 3.5 was best in the CF process and the COD removal increased to 72.0%.
The pH value limits the performance of FO process and affects the speciation of iron and decomposition of H2O2[15], the water sample after FO process contains a lot of iron ion and pH was 3.0-3.5.

It was assumed that impact of the sample size would affect the supporting bodies, so called size effect [3].
Wu, "Experimental Study on Size Effect in Strength of Pervious Concrete and its Associated Factor", Advanced Materials Research, Vols. 634-638, pp. 2684-2692, Jan. 2013
Bittner et al., Experimental Investigation of the Mechanical Properties of Textile Glass Reinforcement, Applied Mechanics and Materials (2015), Vol 732, pp. 45–48, 10.4028/www.scientific.net/AMM.732.45