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Also, only limited systematic investigations have been focused on HAZ properties.
Figure 1 shows the HAZ properties both with and without PWHT.
Fig. 1 Influence of PWHT on properties of HAZ Effect of PWHT on microstructure.
However, taking into account the applied environment of ASTM4130 steel, PWHT is the only measure to improve HAZ properties.
The reason may lie in two factors.

Research on Erosion Mechanical Parameters of Wind-Sand Environmentin the Central and Western Region of Inner Mongolia Hao Yunhong 1,a, He Peiyuan1,b and Wu Anli 1,c 1School of Civil Engineering, Inner Mongolia University of Technology, Hohhot, Inner Mongolia , 010051, China ahaoyunhong_hyh@163.com, bhepeiyuan3504@163.com, cwuanli139@163.com Keywords: Wind-Sand environment; erosion; mechanical parameters Abstract.
The central and western region of Inner Mongolia is a high activity area of sandstorm in northern China, the infrastructures in this region have been long-time eroded by wind-sand environment, those durability and safety have been seriously affected.
Grade of the sandstorm strength Strength grade Maximum wind speed/m·s-1 Minimum visibility Very strong ≥25m/s 0-grade 0～50m strong ≥20m/s 1-grade 50～200m middle ≥17m/s 2-grade 200～500m Weak ≥10m/s 3-grade 500～1000m The Erosion Mechanical Parameters of Sandstorms (1)Sand particles Characteristics Sand particles characteristics are an important factor that affects sandstorm intensity.
Table.3 The grade of wind-speed Wind grade Wind speed range Average wind speed 4 5.6～8.0 7 5 8.1～10.8 9 6 10.9～13.9 12 7 14.0～17.2 16 8 17.3～20.8 19 9 20.9～24.8 23 10 24.9～28.8 26 11 28.9～33.6 31 12 33.7～38.6 35 (3)Dust concentration Dust concentration is an important factor that affects sandstorm intensity, it is an important parameter that measure the sand amount of sandstorms.
Research on the Mechanical-Properties of Flexible Surface material by Erosion in Sandstorm Environment.

Young equation show that any change in the wetting angle factor will affect the wettability of solder alloy.
So, modifying the composition of any phase in soldering system is correspondingly changed surface tension, which will affect the wetting properties of the solder.
Mechanical properties of solder joint.
The Mechanical properties of Sn0.3Ag0.7Cu-Pr solder joints were greatly improved with adding Pr.
Sn0.3Ag0.7Cu-0.05Pr solder joint has the best mechanical properties.

This paper focuses on the effect of different fiber content on the mechanical properties of specimens with and without weld lines.
The mechanical properties of these composites were determined by quasi-static (standard tensile testing) and dynamic (Charpy impact test) testing methods and the corresponding weld line factors were calculated.
From the results of the tensile and Charpy-impact tests, it was ascertained that the temperatures and the holding pressures during injection molding did not affect the tensile and impact properties, but fiber length had a major impact on the mechanical properties of this specific composite.
Further experiments were carried out wherever the mechanical properties of the produced specimens were investigated.
However the fiber content decreased both mechanical properties except the tensile strength of the weld line free specimens.

Numerical simulations to identify the association of those factors with peak temperature have generated the investigations of specific heat, thermal conductivity and density.
· Material properties are uniform
d) Material properties.
Fatigue properties of friction stir overlap welds.
,Weldability and mechanical properties of dissimilar aluminum–copper lap joints made by friction stir welding, Journal of Alloys and Compounds, Vol. 490, Issue 1-2,2010, 652–655

Laser-arc hybrid welding properties of aluminum alloy 6005A JIN Xing Ye1, a SONG guang hao2,b ZHENG Wei gang3,c 1School of Energyand Power Engineering，Wuhan University of Technology, Wuhan 430063, China 2School of Energyand Power Engineering，Wuhan University of Technology, Wuhan 430063, China 3Engineering Training Center, Wuhan University of Technology, Wuhan 430063, China a593392509@qq.com, b1053087993@qq.com, czfeidiao@126.com Keywords: Aluminum alloy 6005A; Laser-arc hybrid welding; joint microstructure; joint mechanical properties.
Optional 6005A-T5 aluminum alloy sheet be 11 kinds of process parameters laser - arc hybrid welding, by comparison, select standardized test results carried out to optimize weld joints microstructure, mechanical properties of weld performance analysis.
Introduction:6005A aluminum 6005A aluminum alloy medium strength is Al-Mg-Si heat treatment, the alloy has excellent processing property and good corrosion resistance.
(a)The parent material (b)The fusion zone (c)Weld line Fig.2 The optical microstructure of laser - aluminum alloy 6005A arc hybrid welding Mechanical properties of joints 4.1 Tensile strength Static tensile strength test to obtain the process number 11 welding parameters of welded joint specimen sampling.
The heat affected zone also appeared a certain degree of softening, but the heat affected zone is very narrow, it is one of the arc hybrid welding characteristics and advantages of laser.

Ulm et al. [7-11], obtained key mechanical properties of C–S–H that should be helpful to identify the link between morphology and mechanical properties of C–S–H by novel grid-indentation technique.
It is seen that the mechanical properties of all samples are obviously decreased.
This indicates the mechanical properties decrease with the increase of the dry-wet cycle times.
This indicates that the water-cement ratio has little influence on mechanical properties of each phase, which approves the theory reported by literature [11] that the mechanical properties measured by nanoindentation are indeed intrinsic material properties.
(3) Water-cement ratio has little influence on mechanical properties of each phase.

Factors Affecting the Metal Recovery Yield During Induction Melting of Aluminium Swarf Hélder Puga1a, Joaquim Barbosa1,b and Carlos Silva Ribeiro2,c 1CT2M – Centre for Mechanical and Materials Technologies, Universidade do Minho, 4800-058 Guimarães, Portugal 2FEUP, Departamento de Engenharia Metalúrgica e de Materiais, 4200-465 Porto, Portugal apuga@dem.uminho.pt, bkim@dem.uminho.pt, csribeiro@fe.up.pt Keywords: Aluminium swarf; Recycling; Melting; Environment Abstract.
Swarf moisture reduction, induction melting under protective atmosphere and a specially developed degassing technique were found the most important factors influencing the recycling process.
Nevertheless, yields obtained for 300 and, particularly, 500 bar, were also very high, revealing that melt protection and ultrasonic processing are perhaps the most crucial factors in the recovery process.
Conclusions · An efficient and environmentally friend swarf recycling technique was developed and its is ready for widespread dissemination; · The combined effect of induction melting, argon protective atmosphere and ultrasonic vibration of the melt during the entire processing are the crucial factors of the process, and can lead to 95% Al recovery yield; · Besides those factors, the briquetting pressure is also a major factor of the process.
Chino et al., Mechanical properties of Mg-Al-Ca alloy recycled by solid-state recycling.

The effects of surface topography fractal parameters of B104a-70 mechanical seal on contact properties of the end faces are analyzed by theoretical simulation.
According to established model, effects of surface topography fractal paremeters on contact properties of the end faces for mechanical seals are analyzed.
Effect of Surface Topography Fractal Parameter on Contact Property Take B104a-70 mechanical seal for example.
Asperity contact friction factor fc = 0.1 [1,4] is took for theoretical calculation.
(2) The surface topography fractal parameters of sealing ring have great effects on contact properties of the end faces of friction pair for mechanical seal.

A New Method Forecasting Physical and Chemical Properties of the Shale Based on Quantum Neural Network Yuxue Sun1,a, Yuanlong Xiang1,b, Zehua Wang1,c, Liming Zheng2,d 1Petroleum Engineering Department in Northeast Petroleum University, Daqing, Heilongjiang, China 163318; 2 Shallow Water Oil Development Company PetroChina Liaohe Oilfield Branch Company, Panjin, Liaoning, China 124010 afengxuexyl@126.com, b121533370@qq.com, c1175820014@qq.com, dfengxuexyl123@126.com Keywords: sidewall instability; shale; quantum neural network; prediction; influence factors Abstract: Influence factors of sidewall stability contain mechanical factors and chemical factors.
Based on the collection of the influence factors of physical and chemical properties of the shale, we decided the main factors that influence the stability through the simple correlation analysis and applied a kind of quantum neural network based on the multilayer excitation function.
Influence Factors of the Sidewall Stability Using the quantum neural network to predict the physical and chemical properties of the shale, firstly, the main influence factors should be determined.
There are many factors which affect physical and chemical properties(recovery rate, expansion rate, cation exchange capacity, etc.) of shale.It is difficult that all factors are collected to train.
Physical and chemical properties of shale are the main factors which influence sidewall stability.