Search results

The properties of steels can be influenced in a wide range by changing the thermodynamical properties by suppression of the equilibrium states during cooling [6].
Annealing, normalizing, hardening/quenching and tempering are the most important heat treatments often used to modify the microstructure and obtain desired mechanical properties in steel [7].
Types of adhesive bonding failure Rahman et al. [8] stated the failure strength of adhesively bonded joints depends on many factors such as material properties, specimen geometries, test environments, surface preparation procedures.
It will be focusing on the effect of heat treatment to the mechanical properties, surface roughness, microstructure of selected steel and how it influence the strength of adhesive joint.
A systematic experiment will be conducted to evaluate optimum factors that contribute to strength of adhesive joint by using DOE approach (Anova).

He2,d 1Department of Chemical and Materials Engineering, the University of Auckland, Private Bag 92019, Auckland 1142, New Zealand 2State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China aemail: hbi001@aucklanduni.ac.nz, bemail: cyu060@aucklanduni.ac.nz, cemail: p.cao@auckland.ac.nz, demail: yuehui@mail.csu.edu.cn Keywords: Powder sintering; Mechanical properties; Porous alloy; Ti-6Al-4V Abstract.
Introduction Titanium and its alloys offer very attractive mechanical properties and exceptionally corrosion resistance, and hence have found a wide range of applications such as in aerospace, marine, medical and chemical processing industries [1, 2].
The characteristics of the porous microstructures, mechanical properties and corrosion evaluation are investigated.
Although the porosity is the main factor for the attendant mechanical properties, the chemical inhomogeneity may play some roles in this aspect.
Qian, Sintering of Ti-10V-2Fe-3Al and mechanical properties, Materials Science and Engineering A, 528 (2011) 6719-6726.

Unlike other forecasting models, the model input variables of wind power prediction model are not only historical wind power output but also major factors effecting wind power in order to improve prediction accuracy.
Major Factors Effecting Wind Power Wind farm output power comes from wind power captured by wind turbines.
Therefore, the major factors affecting wind farm electric output are simplified to air speed and air temperature.
As mentioned in previous section, the major factors affecting wind turbine output are air speed and air temperature, so they can be used as model input, and can be obtained from a Supervisory Control and Data Acquisition (SCADA) system installed at a wind farm.
Further studies will be carried out to improve this dynamic model, such as considering effects of other factors which are wind direction, humidity, etc.

These allow obtaining a change in properties in the direction parallel to the imposed gradient.
Changes in mechanical, optical, and electrical properties as well as in thermal conductivity, hardness, and brittleness, and combinations of the above, e.g. chemical resistance with increase in mechanical or electrical properties, can be achieved [6].
These materials possess different physical and chemical properties.
These factors can affect the mechanical and high temperature oxidation behavior.
The presence of the Ti3SiC2 phase in the matrix has a profound influence on the properties of the composite.

The quality of the parts produced is evaluated mainly in terms of their mechanical properties, dimensional accuracy, and the homogeneity of the material.
The quality of the parts is affected by a set of processing parameters and by the quality of powder used.
However, an effect human factor on the results of defect analysis should studied in more detail.
Van Humbeeck, Part and material properties in selective laser melting of metals, paper presented at 16 th International Symposium on Electromachining (ISEM XVI)Shanghai, China, Apr-2010 [3] D.
Olakanmi, “Selective laser sintering/melting (SLS/SLM) of pure Al, Al–Mg, and Al–Si powders: Effect of processing conditions and powder properties,” J.

This leads to a wide range of studies in metal powder manufacturing, compaction, sintering, and improvements of mechanical properties of powders.
Green compact maintains its shape by mechanical bonding, which is very fragile.
Mechanical or hydraulic presses with separate movements of multiple punches are used.
Figure 2: Powder Feeding Mechanism In this paper, design of the feedshoe and the number of shakes are considered to be the most important factors affecting the density distributions of P/M compacts.

In tensile strength test of load perpendicular to the weld axis, the specimens had same tensile properties as that of the raw material.
Compared with the conventional drawing steels, AHSS combines high strength and good formability properties, which make thinner steel sheet to be used possible and practical [1-4].
In this paper, main characteristics of CO2 laser welded 1000MPa grade thin TRIP steel plate, including microstructures and mechanical properties, were investigated.
Tensile properties were tested with the load perpendicular to and parallel with the weld axis at a crosshead moving speed of 5mm/min. on Automated Materials Testing System of Instron.
And porosity fraction of specimen was the determinant factor for the type of fracture likely to be occurred.

Research found that bonding between concrete and fibers is an important factor in the performance of the composites [3, 4].
These characteristics can influence the stability and the mechanical properties of the whole fabric, ultimately affecting the penetrability of the particulate cement matrix [11, 14].
Hegger et al. (2008) investigated the bearing behavior of samples strengthened with AR-Glass under tensile load and compared two fabrics which feature a different roving cross-sectional area at otherwise similar properties.
Mechanical properties of yarns were tested by tension universal machine with speed of 100 mm/min.
Mechanical properties Strain at break Modulus of elasticity (GPa) Tensile stress (MPa) Area section of yarn (mm2) Tensile force (N) Roving finesse (Tex) Type of yarn 0.20 3.5 405 0.18 73 213 Nylon 0.17 4 386 0.36 106 430 Nylon Yarn with 430 tex is consisting up two 213 tex yarns that are twisted.

Key words: Leachate; Garbage; Output Abstract: The influencing factors of landfill leachate are analyzed.
垃圾渗滤液产生量的影响因素The amount of leachate generated factors 影响垃圾渗滤液产生的因素很多,归纳起来,主要有以下几方面:区域降水及气候状况、垃圾性质与成分、填埋场水文地质条件、填埋场作业区大小、垃圾覆盖层状况等。
The main factors of rainfall is surface runoff and infiltration, rainfall intensity, rainfall duration, landfill cover conditions.
The water storage of garbage during its landfill process depends on the waste composition, landfill space temperature, the depth of the landfill, compacted layer level and coverage of closed properties.
Factors that affect evaporation and transpiration is mainly radiation, temperature and humidity, wind and other weather conditions, followed by vegetation and soil and waste water the size and distribution.

Lots of researches show that, the addition of organic matter can affect the microstructure of cement stone, and improve the physical and mechanical properties of the cement mortar and cement concrete [2-5].
Materials and methods in mechanical approach Materials and mixtures Cement The ordinary Portland cement was employed in the experiment.
Preparation of CA solution CA solution was obtained via the following equation (calcium carbonate was excessive to ensure acrylic acid react completely): 2CH2CHOOH+CaCO3→(CH2CHO2)2Ca+ H2O (1) Preparation of test specimen Table 2 shows the three factors and three levels of orthogonal test.
Table 2 Three factors and three levels of orthogonal test Levels Factors A(initiator/%) B(cross-linking agent/%) C(accelerator/%) 1 1 8 3 2 2 10 5 3 3 12 7 Results and discussions Compressive strength in different ages The early strength of CA modified cement is lower than blank sample.
(3) Through DTA-TG and XRD analysis, CA can inhibit the transformation of AFm from AFt, and affect the nucleation and precipitation of Ca(OH)2.