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Box 524, Auckland Park Kingsway Campus, Auckland Park, Johannesburg, South Africa. 2006. 2Doctorate Candidate, Department of Mechanical Engineering Science, University of Johannesburg, P.
FSP has great advantages, which include solid state microstructural evaluation, modifying the mechanical properties of materials by optimizing the tool design and the process parameters, the depth of processed zone and location which can be identified by the operator.
For the VFSP, the overlap ratio is an important factor for the evolution of the microstructure and alteration of the mechanical properties [7].
Nevertheless, FSW is associated with a number of unique defects which are undesirable in joints as they are known to adversely affect the joint integrity or the processed zone.
The quality of joints produced in FSW/FSP are affected by the choice of the tool profile, the rotational speed, feed rate, tilt angle, plunge depth and variation in plate thickness.

The mechanics properties of the geopolymers are complex and affected by a large variety of synthesis parameters, including the material properties, raw material polymerization degree, the chemical composition of the geopolymeric binder, the relatives fractions and the non-actives charges, inactive fillers characteristics, porosity and density, impurity elements and the associated parallel reactions [3].
Therefore, the factor influenced by the alkaline solution concentration and the metakaolin, will significantly affect the physical and mechanical properties at the end of the synthesis geopolymerization.
Mechanical resistance of the geopolymer with a cure time of 13 and 20 days.
Mechanical resistance of the geopolymer with a cure time of 7 and 28 days.
Davidovitis, Properties of geopolymer cements.

Journal Citation (to be inserted by the publisher) Copyright by Trans Tech Publications Production and Properties of Glass-Ceramic from Incinerator Fly Ash Hyung-Sun Kim 1* , Jae-Myung Kim 1, T.
In this work, we report the results of production and properties of a glass-ceramic derived from Korean incinerator fly ash with high Cl content.
It seems that Na and K components exist as a NaCl and KCl from the result of water-washing and high content of CaO in the fly ash affected a decrease in melting temperature.
The process of water-washing the fly ash, melting and then a single heat treatment, produced a good glass-ceramic in terms of economic, physical and mechanical properties.
The values for glass-ceramics are somewhat higher than those for glass, but it seems to be not affected very much.

These intermetallic phases decrease the corrosion resistance significantly, and their compounds affect the mechanical properties, because causes an uneven distribution of alloying elements [6,7].
The study concerns the influence of solution annealing parameters (time and cooling rates) on the microstructure and mechanical properties of a duplex stainless steel.
Among the treatment parameters analyzed, it was observed that for longer treatments, the cooling rate is an important factor to define the microstructure of the steel.
Welding processes, microstructural evolution and final properties of duplex and superduplex stainlees steels (edited by I.
Alvarez-Armas: Recent Patents on Mechanical Engineering Vol. 1 (2008), p. 51

This suggests that alloy design leading to a suitable distribution of second-phase particles can improve the properties and formability of wrought magnesium alloys.
Particular attention is paid to how this is affected by particle breakdown during deformation.
Vatne et al. [6] have proposed two factors to account for this phenomenon.
These factors play larger roles in cases where the PSN mechanism is not particularly efficient, e.g. in hot deformed alloys, where the dislocation densities are lower than in cold formed materials.
Hot compression tests suggest that high temperatures (above 300°C), strains (above 0.25) and strain rates (above 0.1/s) will lead to the presence of fine DRX grains in the deformed microstructure and therefore to improved mechanical properties and formability.

The theme of this paper concentrates on hydro- projects’ seepage field in rocks, including the properties of the seepage which flow through both hole qualitative like rocks and fractured rocks.
Seepage is an important factor which influences the distortion and stress state of the Dam, as well as the stability of the skewbacks.
The curtain is the important factor to influence seepage field, so we calculate the curtain that is 82 meters and 46 meters wide respectively[3], the curtain thickness is 4-5m.
Main physical mechanical parameters of rock 82m curtain 46m widened curtain Dam foundation 0.52 0.523 Left abutment 0.487 0.479 Right abutment 0.458 0.451 Result Analysis Head contour and the known head boundary and impervious boundary are mutual Perpendicular.
The shoulder of dam circle seeping is the important factors to affect abutment stability.

Under coupled effects with multi-factors.
Radial-axial ring rolling is a complex metal forming process under coupled effects with multi-factors.
The forming conditions and some main influence factors are listed in Table 1.
These materials properties parameters can be obtained by experiment or consulting material hand books.
Conclusions (1) Radial-axial ring rolling is a fully coupled thermo-mechanical metal forming process with dual-deformation-zone and extremely discontinuous nonlinearities under coupled effects with multi-factors

Factors affecting DDC are complex and numerous, such as precipitated phase, impurity element segregation and grain boundary properties [8, 9], etc.
However, it is normally difficult to evaluate the influence of grain boundary on DDC alone due to complex influencing factors.
In terms of macro properties, 305 sample has stronger grain boundary deformation ability and higher VoA than that of 315.
In addition to the microstructure and dislocation operation, there may be other influencing factors, which need to be further studied.
High Temperature Tensile Properties of FM-52M Nickel-base Alloy Cladding.

Introduction At present, hot pressure forming is regarded as one of the most important processes to manufacture products with good mechanical properties and fine metallurgical structures[1-3].
The flow stress during the hot deformation is influenced by many factors such as strain, strain rate, temperature, etc. and understanding their effects has been a difficult task due to their complex nature.
The mechanical properties of the workpiece under hot working are generally expressed by a constitutive equation, which connects flow stress and the variables such as strain, strain rate, temperature[13].
Based on experimental stress-strain data, a revised constitutive equation incorporating the effects of temperature, strain rate and work-hardening rate of the material is derived by compensation of strain and proposed to describe the plastic flow properties.
Dynamic recrystallization: Mechanical and microstructural considerations [J].

These factors are also disadvantages of microwave heating.
Additives must be conductive or have dielectric properties that are significantly different from the polymer matrix [7, 8].
Improvement in properties can be achieved by improving the quality of distribution of modifying additives during processing.
The aim of this work is to study the possibility of improving the properties of non-polar polymers by carbon nanotubes that absorb microwave waves.
Elsner, Twin-screw extrusion of multi walled carbon nanotubes reinforced polycarbonate composites: Investigation of electrical and mechanical properties, IOP Conf.