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Analysis on the friction and wear properties of friction stir jointing for 7022 aluminum alloy joining region H.
Zhu1 1College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 2School of Mechanical Electronic & Information Engineering, Huangshan University, Huangshan 245041, China; awanghnfeng@163.com Keywords: Friction stir jointing; Friction and wear; 7022 aluminum alloy; Solar support and solar cell frame; Friction coefficient and wear capacity Abstract: The friction and wear properties of the friction stir jointing 7022 aluminum alloy joining region were tested in this paper.
Due to the random factors influence in friction process, the law of the friction coefficient reflecting friction and wear was not the same with the law of wear volume reflecting friction and wear.
Contrasting the hardness and the wear volume of jointing area, can be found that the hardness was one of the important factors affecting the friction and wear performance.
Due to the effect of random factors in the process of friction, the friction coefficient reflection the law of the friction and wear was not agree with wear volume reflection the law

So the characters of aggregates have an important defect on the mechanical properties of rock-fill in self-compacting concrete.
In view of the large number of influence factors on mechanical properties of the strength of concrete, this paper only discusses the influence factor of particle size distribution on the mechanical properties of recycled aggregate concrete.
However, the reasonable aggregate gradation is also influenced by other factors.
And the particle type and particle distribution will affect the properties of concrete.
And the particle type and particle distribution will affect the properties of concrete.

Flocculation process is a method of ballast water treatment process which can satisfy the security, effective, environmental protection, operation and economic request , on the treatment of ballast water has been studied widely at home and abroad .The paper summarizes the flocculation process application treatment about ballast water of ship, introduced the affecting flocculation process factors , and discussed the application prospect of flocculation technology in ballast water treatment application field .
There are mechanical treatment, physical treatment, chemical treatment, quantitative ballast and other methods divided into ballast water treatment methods at present, among them the chemical method is widely applied[5].
The clay mineral types, structure and surface properties are the agglomerate factors effect on the harmful algae, and the bentonite is the best among other clay minera; the removal rate related to whether clay minera can form floccule with harmful algae or the size of "floc formation" , the floc forming larger with higher removal rate.
Else M test research on combined electric flocculation with flocculation sediment technology which based on electric flocculation experiment, Electric flocculation process also act a good effect on removing efficiency of total phosphorus in seawater, which increases with the current density and the electrolysis time extend; the residual concentration of total phosphorus in seawater and electrolytic current was first order reaction relation, and study the factors which affecting the flocculation removal of CODMn in seawater, extending the time of power on and improve the current density was favorable for CODMn removal.
The affecting flocculation effect factors: l The influence of the flocculant type.

Thus, annealing on anisotropy and mechanical properties of Al-Mg-Si alloy is discussed in present work.
Results and Discussion Mechanical properties of the T4P treated alloy sheets is summarized in Table 1.
Their mechanical properties are different in the three directions, especailly r value.
Table 1 Mechanical properties of the T4P treated sheets.
The following results can be drawn: The mechanical property anisotropy of the alloy sheet in T4P state is affected by intermediate annealing treatment.

In this paper, shelf sediment resistivity property off northwest of the South Yellow Sea is studied by analyzing the influence factors and relations, for providing valuable information to the marine sedimental environment around this area.
Therefore, it is very meaningful to study properties of marine sediments through accurate measurement of sediment resistivity values.
The resistivity of sediment samples from the South Yellow Sea are measured by the micro-probe and the factors of sediment resistivity characteristics and its correlation were analyzed.
Then the influence factors of sediment resistivity in the study area are analyzed.
The main factors that affect resistivity are porosity and moisture content in this paper.

NaCl solution and the tensile mechanical properties before and after corrosion of rebar were investigated.
The research on rebar corrosion and its effect on the mechanical properties of rebar are increasing [7-10].
The cylindrical samples (Φ14mm×450mm) are used for corrosion rate measuring and mechanical properties tests.
The tensile mechanical properties, including yield strength, tensile strength and elongation, are tested by a hydraulic pressure universal testing machine.
These will affect the strength properties of rebar.

At the same time, the influence factors of fracture mechanics analysis of RPV under PTS condition are analyzed.
Fig.1 Finite element model Fig. 2 Axial crack indication Fig. 3 Circumferential crack indication Fig. 4 Pressure and temperature load transients Material Properties.
In order to investigate the effects of material properties, especially neutron irradiation flux, on fracture toughness and stress intensity factor, the fracture toughness obtained with the internal surface fast neutron fluence of 0 and 1×1019 n / cm2 are calculated as well, as shown in Fig. 10.
Conclusion Pressurized thermal shock is an important factor affecting the long-term operation of reactor pressure vessels.
Design and construction rules for mechanical components of PWR nuclear islands. 2000

A Mechanical Investigation on Altered Rocks in Tunnel Construction Kai Cui1, a, Zhong Cheng Ling1, b 1School of Civil Engineering Southwest Jiaotong University, Chengdu, China acuikai80@hotmail.com, b526255259@qq.com Keywords: Altered rocks, Mechanical properties, Physical tests, Mechanical tests Abstract.
It is necessary to study mechanical properties of alteration zone for guarantying construction safety and ensuring the reliability of supporting structures.
Finally, it makes a brief summary about the major determinants of engineering properties of the alteration zone through an overall understanding of mechanical characteristics of the typical altered rocks.
Finally, more attentions are suggested on the engineering properties of altered sandstone which relates to establish the tunnel excavation and supporting program.
Fu, Study on project altered rock shear strength characteristics factors, Research and Exploration Laboratory, 28 (2009), 42-44.

Nowadays, dimensions of commercial cables with Al-C e wire are determined by workability of these alloys rather than their physical properties; a lowest 1mm diameter is determined by technological factors.
Thus, the aim of the present study is to evaluate the effect of ECAP on mechanical properties and electric conductivity.
Mechanical properties.
It is worth noting that increase temperature from 550 to 600oC affects insignificantly mechanical properties.
Effect of 3h annealing on mechanical properties of the Al-Ce alloy subjected to ECAP up to ε~4 at room temperature.

The recent development in FEA of mechanical behaviour of FSW joints is described with particular reference to two major factors that influence the performance of FSW joints: static behaviour and fatigue behaviour.
For most configurations, the local and global mechanical properties decrease as the thickness ratio increases.
Micro-tensile and indentation testing were applied by Rao et al. [21] to determine the local mechanical properties in a FSW joint.
The local stress-strain curves exhibited a drastic change at the advancing side due to a steep gradient of mechanical properties.
The mechanical properties were evaluated by means of tensile and fatigue tests at room temperature.