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The effect of single pulse, double pulse and forceArc MIG welding technology on mechanical properties of Welding joint for 5083 aluminum alloy used in high-speed train body Lei Su 1,a, Yuan Nie1,b , Hua Ji1,c , Chuanping Ma1,d , Shaohua Yan1,e , Lijun Wang1,f , Hui Chen1,g , Lichun Meng2,h. 1.
Therefore，the demand for welding quality of aluminum alloy train body is very high，and the mechanical properties of joints severely affected the overall strength of welded components.
To solve this problem ,we use the 421 EXPERT forceArc MIG of PHOENIX series of German EWM company to perform three types of experiments of single pulse, double pulse, and forceArc welding ,and then effect of three welding methods on mechanical properties of Welding joint for 5083 aluminum alloy used in high-speed train body is compared.
In this paper, mechanical properties, micro shear properties and weld ability of the joints welded by Force Arc are researched.
The sample is mechanical cleaning.

Mechanical Properties of Ultrafine Grained Steels Processed by Large Strain-High Z Deformation-A Review S.V.S.
a susarla.murty@gmail.com, btorizuka.shiro@nims.go.jp Keywords: Ultrafine Grained Steel, Large Strain Deformation, Mechanical Properties, Ductility, Strength, fatigue properties Abstract.
Mechanical Properties of ultrafine grained steels Strength Properties It may be noted that one of the key differences between the earlier [36,37] and present works probing in to the effect of grain size on the mechanical properties of materials is the difference in the microstructure of the materials under comparison at different length scales.
It is known that the grain size is one of the major factors determining the cleavage fracture unit [43].
Fatigue properties Fatigue strength is one of the key properties that permit the practical use of ultrafine grained steels, since it is a frequently required characteristic of mechanical components.

According to experiments by comparing with normal cement concrete and other fiber reinforced concrete, they analyze the mechanical properties and features of sisal fiber reinforced concrete.
This research is mainly on different contents of sisal fiber reinforced concrete’s mechanical properties and failure mechanism.
They find out the relationship of content of sisal fiber and mechanical properties of concrete, analyse the causes of these variations, and compare with other fiber reinforced concrete on mechanical properties, they provide the basis for practical project.
Mechanical properties Mix proportion design Cement: 42.5# ordinary Portland cement, produced by Duxiu Cement Plant in Guilin.
The mechanism analysis The bonding strength analysis The bonding strength of sisal fiber feinforced concrete is mainly affected by these factors, such as density, water cement ratio and maintenance condition, etc.

Study on Properties of Foam Concrete Based on Fractal Theory Wenling Tiana, Jiangbo Yangb and Xiaoyan Zhaoc Civil Engineering Institute of Hebei University of Technology, (Civil Engineering Technology Research Center of HeBei Province), Tianjin 300401,China awltian@henbut.edu.cn, byang113117@163.com, czhaoxiaoyan@hebut.edu.cn Keywords: Foam Concrete; Fractal Dimension; Mechanical Property; Thermal Property Abstract.
To improve properties of foam concrete microstructure is studied with the help of fractal theory, fractal dimension related to mechanical properties and thermal performance of foam concrete is calculated by MATLAB language program.
However, general low strength of foam concrete is seriously affecting its further promotion and application[1].
The relationship between microstructure and mechanical properties and thermal property of foam concrete is studied.
It’s difficult to build the mathematical model of fractal dimension with both factors.

Ren reported that the key factors affecting composite strength were the fiber length and fiber content and wood density [3].
Influences of basalt glass powder contents on mechanical properties of fir sawdust panels.
The content of basalt crystal glass powder (%) 0% 5% 10% 15% 20% Tensile strength (MPa) 11.772 14.864 21.455 21.964 18.867 Elongation at break (%) 1.580 1.627 1.857 1.897 1.647 Bending strength (MPa) 27.422 29.747 37.900 35.850 33.798 The linking fastness of material interface is key factor affecting the mechanical properties [5].
The mechanical properties went down after then.
Properties of Polymer.

The mechanical properties were significantly affected by the iPP content.
Thus, an efficient method to improve the mechanical properties of HDPE monofilaments by introducing iPP component was established.
The effect of the iPP content on crystallisation, dynamic mechanical relaxation behavior and mechanical properties was investigated.
Fig. 6 Frequency of blending monofilaments as a function of a-relaxation temperature 3.4 Tensile mechanical properties of HDPE/iPP blending monofilaments The tensile mechanical properties of HDPE/iPP blending monofilaments are given in Table 3.
The mechanical properties were significantly affected by the iPP content.

Each sub-zone of a spot weld has its own mechanical properties.
Mechanical material properties of SPCC steel (%wt).
Mechanical material properties of SPCC steel.
Hardness is one of mechanical properties of material.
It relates to other mechanical properties, such as yielding and ultimate strength.

In this paper, the mechanical properties of this material which includes compressive strength, elastic modulus, flexural strength and bond strength are highlighted.
After years of service, however, the safety factor of the reinforced concrete slab can decrease due to a variety of factors, which in turn leads to an inadequate safety margin.
Mechanical Properties.
The main finding of the experimental investigation of mechanical properties will be given in this section.
Fig. 8 Deflection at the centre of slabs Conclusions UPR-mortar poses superior mechanical properties compared to the corresponding cementitious-based repair mortar.

In addition, fibers size and the mixing process have direct impact on mechanical properties of fiber-reinforced mortar and concrete.
Multiple factors influence the mechanical properties of vegetal fiber reinforced materials such as surface, type and fiber morphology [10-12].
Mechanical properties of date palm fibers and concrete reinforced with date palm fibers in hot-dry climate.
Properties and performance of natural-fiber composites.
A review of the factors affecting the properties and performance of hemp aggregate concretes.

The microstructure and mechanical properties of the rods and the effects of extrusion temperature on them were investigated.
The results showed that the microstructure and mechanical properties of the extruded rods were strongly affected by the extrusion temperature.
These factors prevent extensive applications of titanium alloys for making numerous products for which the favorable properties of titanium alloys are highly desired [5].
To obtain comparable mechanical properties as wrought alloys, PM Ti alloys should be fully densified and fully sintered, have fine and homogeneous microstructures and low content of impurities, especially O, N and C interstitial elements which can cause the mechanical properties of Ti alloys to deteriorate dramatically[6].
Dong, et. al., Microstructure and Mechanical Properties of Highly deformed Ti-6Al-4V, Materials Science and Engineering.