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Microstructure and Mechanical Properties of Friction Stir Welds in Aluminium Alloys 2024-T3, 5083-O and 6063-T6 R.
The aim of this research is to study the effect of the welding process on the microstructure and mechanical properties of friction stir welded joints in aluminium alloys 2024T3, 5083-O and 6063-T6.
Some authors account the improvement of mechanical properties in the weld region [3].
The chemical composition and the state of treatment of aluminium alloys are determinant factors of the degradation of mechanical properties that occurs during welding operations. 0 20 40 60 80 100 120 140 160 180-30 -20 -10 0 10 20 30 Distance [mm] Hardness HV1 2024FSW 5083PM 5083FSW 6063PM 6063FSW 2024PM Fig. 3 - Hardness evolution in friction stir welds (FSW) on aluminium alloys 2024-T3, 5083-O and 6063-T6; PM - parent material; TMAZ - thermal and mechanically affected zone; AS - advancing side; RS - retreating side.
Therefore the change in mechanical properties of the welded joint is function not only of the welding technology but depends also of the chemical composition and of the thermal and mechanical treatments of the aluminium alloys.

Factors Affecting Bond Generally, bond strength between masonry units and mortars is determined by two microstructures that are the amount of hydrate products and bond area between units and mortars.
However, those two factors are determined by mortar and brick mechanical and physical properties, testing methods, curing condition, age and workmanship.
However, those two factors are determined by mortar and brick properties
Materials and Structures (2010) 43:913–922 [5]Venkatarama Sugo, Factors Affecting Bond Strength of Masonry.
I., "Factors Affecting Bond Strength and Resistance to Moisture Penetration of Brick Masonry," Symposium on Masonry Testing, ASTM STP 320, American Society for Testing and Materials, Phila- delphia, 1963, pp. 16-30 [10] Isberner, A.

Microstructure characteristics and mechanical properties of the rapid solidified ribbon of 7A09 aluminum alloys are studied by means of X-ray diffraction (XRD), scan electron microscopy (SEM) and hardness measurement.
The results show that the rotate speed of the roller is the key factor affecting the ability of the forming ribbon.
All above are beneficial to increase the mechanical properties, to improve machining performances and to enhance corrosion resistance of the alloys [1~4].
Microstructural features and mechanical properties of the rapid solidification ribbon of 7A09 aluminum alloys are studied.
Conclusions (1) The most important factor affecting the forming ability of ribbon is the rotating speed of the cooling rotor.

Welded joint is a mechanical heterogeneous body, which is composed of base metal, weld metal and heat affected zone (HAZ).
The strain rate near crack tip reaches 10 3 under the impact velocity of 5m/s, so dynamic properties under corresponding strain rate should be used in dynamic analysis.
Welded joint is a mechanical heterogeneous body, which is composed of base metal, weld metal and heat affected zone (HAZ).
In this paper, dynamic J-integral is used to characterize the dynamic fracture behaviour of welded joints with mechanical heterogeneity, and the effects of geometry factors on dynamic J-integral is studied.
Base Metal σyd[MPa] n Weld σyd[MPa] n 620 10.32 496 8.09 Table 1 Mechanical properties of the computational model The present 3D FEM computations are performed using a commercial FEM code of MARC.

Improvement in Mechanical and Metallurgical Properties of Friction Stir Welded 6061-T6 Aluminum Alloys through Cryogenic Treatment K.
Subsequently, mechanical properties drastically improved and the joints achieved a maximum joint efficiency of 74% of the base material.
Even though aluminum alloys have better corrosion resistance, welding atmosphere, conditions, and parameters are the factors which control the corrosion resistance.
Schaper, Characterization of microstructure, mechanical properties and corrosion behaviour of an AA2219 friction stir weldment, J.
Liu, Effect of welding parameters on microstructure and mechanical properties of friction stir welded joints of 2060 aluminum lithium alloy, Int.

"Applicable and durable configuration" can effectively solve these problems, "applicable and durable" include durability, mechanical properties, enforceability and economy.
Impact factors.
Material properties.
If mechanicals can not meet the needs, durability and other properties are out of the question.
The factors weights were also determined as follows: {Environment, Traffic loads, Material properties} = {0.44, 0.29, 0.27}.

Hard Thermosetting Polyurethane Plastic Degradable Test and Its Influential Factors Zhifeng LIU 1, a, Jian ZHAO 1,b , Hui XIA1,c, Zhongwei WU 1,d 1 School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei China 230009 apeak.liu@263.net, b136212178@qq.com, c 872991151@qq.com,d9458319@qq.com Keywords: mechanical and physical methods; hard polyurethane; ATR-FTIR; degradation Abstract.
Finally, the cutting blades of the millstone edge begin to rotate, through collision and impact of the powder particles under the action of centrifugal force, materials are further degradated and softened [2]. 2 3 1 Fig. 1 Three-dimensional structure of shear shredders (1) Central area (2) Millstone area (3) Blade area 1.2 Orthogonal test arrangement To analyze the influence factors of polyurethane degradation, at the early stage of experimental basis, experimental plane parameters, test the inherent properties and external environment is the main reason affecting the degradation speed in which the increase of rotating speed will make the material pressed by shearing, extrusion and friction; extension of time can make material accumulate more mechanical energy, material activity further enhanced; The increase of the feed quantity can reduce the clearance between materials and the cavity wall, meanwhile it can increase the friction; ATR-FTIR test results will be different in
different sizes, so the changes in particle size should be also treated as the factors.
The pulverizer considers three factors and one by one test process is more cumbersome, so in the actual test we base on the orthogonal experiment table to arrange test, without affecting the accuracy of the results.
= （1） is the rate of mass loss, is the increases rate of specific surface. 3.2 The analysis of the degradation factors The machine’s parameters and external environmental factors will affect the degradation effect and rate.

Multiscale Mapping of Mechanical Properties by Instrumented Indentation Test Kug-Hwan Kim1, a , Young-Cheon Kim1, b , Seung-Kyun Kang1, c Kwang-Ho Kim 2, d , and Dongil Kwon1, e 1 Dept. of Materials Science and Engineering, Seoul National University, Seoul, Korea 2 Frontics Inc., Seoul, Korea a samadhi0@snu.ac.kr, b im01000@snu.ac.kr, ckskg7227@snu.ac.kr d khkim@frontics.com, edongilk@snu.ac.kr Keywords: Instrumented indentation test, mechanical mapping, tensile properties, residual stress Abstract.
Thus, mechanical testing methods that can measure multiscale properties are essential for the safe and economical operation of macro/micro systems.
In addition, the tensile properties and residual stress distribution of weld joints with very rapid mechanical gradients were tested using a macroindentation system made by Frontics, Inc.
The results show that IIT is effective as an in-service inspection method in order to monitor the strength variation and mapping of mechanical properties.
This implies that IIT can be used not only for nano/microscopic mapping but also macroscopic mapping of mechanical properties.

The tension and bending properties were investigated experimentally, and then dual variance analysis was used to show the significant difference of the mechanical property in the transverse and longitudinal orientation as well the appreciable impact of different fiber ratios to the mechanical property.
So according to the anisotropy, grasping the difference of mechanical properties in the transverse and longitudinal has the vital significance to the design of composite board.
This is because the property of the composite board is also affected by other factors such as the interfacial bond strength between CBF and PP.
This is probably due to a slight deviation, in the control of hot pressing process, which makes the adhesion property of the board in the fiber ratio of 30/70 worse and then affects its mechanical property.
The board in the fiber ratio of 30/70 is mainly scattered wire fracture, so the mechanical properties are weaker than the other two boards.

The separation force is one of the most important properties of artificial leather industry.
The result of cause and effect analysis shows that there are three laminating factors directly affect the separation force.
Table 1 Levels of laminating factors.
Based on the analysis of variance (ANOVA), all main factors are significantly affected to MD and TD, whereas there is no interaction effect from all combinations of the main factors.
Hajjaji, Quantification of the effects of manufacturing factors on ceramic properties using full factorial design, J.