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The results highlight that the billet temperature and percentage deformation are critical factors affecting die wear.
Introduction Metal forging is one of the conventional manufacturing processes that produce products with exceptional mechanical properties while minimizing or eliminating material waste.
The billet material is AISI 1035 steel, and AISI H13 tool steel is used for the dies, with their properties detailed in Table 1.
Properties of billet and die material.
Analysis of variance (ANOVA) was applied to identify significant parameters, with billet temperature and percentage reduction identified as the most influential factors affecting the response.

The results reveal that friction pressure and friction time are the main factors of this welding process.
The properties and mechanical properties of welded samples were investigated to consider the effect of the condition process.
Because of the absence of the dendritic structure, this welding method produces better mechanical properties than other fusion welding methods.
This is the area that causes poor mechanical properties.
Mechanical Properties and Microstructure, in welded joints of Low and Medium Carbon Steels, Applying Rotary Friction.

In study conducted by Ong and Shen [7], various factors affecting the repair of 2.5 mm thick 2024-T3 aluminium plates have been investigated, especially patch materials.
Mechanical properties of this material in two orientations are presented in Table 1.
Mechanical properties of composite patch (Graphite/Epoxy) are presented in Table 2 and adhesive film used for patching is FM-73 where shear’s modulus is Gxy= 413.68 MPa and thickness t=0.15 mm.
Table 1: Mechanical properties of 7050 T7451 Al-alloy Orientation specimen (MPa) (GPa) () () L-T 455.06 71.70 34.06 68.13 0.33 T-L 448.16 71.70 27.47 54.94 Table 2: Mechanical properties Graphite/Epoxy (GPa) (GPa) 172.37 10.342 4.826 0.3 The stress intensity factor “DK” for Single Edge Notch Tensile specimen with semi circular edge notch “SENT” has been developed by Newman [18] and implemented in AFGROW code.
Results shown that threshold stress intensity factor was affected by R-ratio.

Rheological properties are significantly related to workability of concrete and to requirements of mixing water amount and thus affect the development of strength, durability of concrete and resistance of concrete to extreme conditions and to high temperature.
Introduction Rheological properties of fresh concrete are one of the factors determining its use and depend on a number of variables, such as cement type, dose and type of plasticizing admixtures, type of aggregate, type of ingredients used, environmental temperature and finally delivery time of fresh concrete to the construction site [1], [2].
Their properties are comparable with those of Portland cement.
Besides monitoring the physico-mechanical properties of concrete with Portland-composite cements and Portland-limestone cements their rheological properties must be also verified.
Rheological properties of cement pastes may be influenced by admixtures based on nanotechnology (carbon nanotubes), which affect also other physical and mechanical properties.

For braided hollow profiles, however, technical possibilities to achieve process integrated adaption of a components’ mechanical properties are limited.
Adaption of the braid angle allows adjustment of the laminate’s properties in the entire cross section (to what extend depends on braid type and choice of materials), affecting the haul-off speed at the same time.
Uniform mechanical properties can still be achieved over multiple braid layers and appropriate offset angles between the layers (the mandrel cross section defines the rotation plane).
The remaining factors and interactions (not displayed) have only minimal impact within the specified factor levels.
Drechsler, Characterization of Biaxial and Triaxial Braids: Fiber Architecture and Mechanical Properties, Applied Composite Materials 19:259, Springer Netherlands, 2012

The research on the tribological properties of C/C composites Wenxia Wang School of Mechanical & Electronic Engineering, Shanghai Second Polytechnic University, Shanghai 201209, P.R.
Results indicated that, the C/C composites show excellent mechanical and tribological properties.
When the volume fraction of CF reach 15vol%, the tensile properties increase greatly.
This means that the concentration of the inclusions is the main factor affecting the yield strength of a filled polymer.
Lim, High-speed tribological properties of some Al/SiCp composites: II.

It is the fundamental understanding of these complex relationships that often involves hundreds of factors, which improves quality without losing productivity and raising cost.
These materials offer stronger components with good machinability owing to their even hardness properties.
Introduction Research on cast solid solution strengthened ferritic spheroidal graphite iron with high silicon content (HSI), originally started in order to enhance machinability and reach the same or higher mechanical properties as ferritic/pearlitic GJS-500-7 [1].
The mechanical properties of more than 200 tensile specimens from industrial foundry melts have been compiled from over 30 years of research.
Fig. 3: Influence of tramp elements on the tensile properties.

Environment effects can influence mechanical performance of the bridge including carbonation of concrete, freeze-thaw damage, steel corrosion, acid rain et al., and it is one of main factors affecting concrete bridge deterioration.
The mechanical behavior of corrode steel has a great influence on long term performance and service life of concrete bridge.
The nominal properties bear a relation to initial cross-sectional area, and they indicate the mechanical performance of corroded bar.
Although it can’t show the essence of corrosion, it can simulate the time-dependent properties of the corroded reinforcing steel, and use in the prediction of long term performance of reinforced concrete structure.
Experimental study on the deterioration of mechanical properties of corroded steel bars, China Civil Engineering Journal, Vol. 12(2008), p. 42-47.

The Static Mechanical Property of Concrete at Elevated Temperature Jun-lin Tao 1,a，Li-bo Qin 1,b，Kui Li 1,c，Bin Jia 1,d 1Department of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang, Sichuan, China, 621010 a Junlintao@126.com, bQinlibo@126.com, clikui84@126.com, djiabin216@126.com Key Words: concrete, constitutive model, high temperature, static compression experiment, mechanical properties.
Owing to building may encounter fire in use, in order to protect live and property of people, it's necessary to know the mechanical property of concrete at high temperature.
Research shows that rapid heating is a barrier to research the mechanical property of concrete at high temperature.
The compressive strength is an important index of concrete mechanical property, the compressive strength of concrete under different temperature is shown in table 1.
Due to the complexity of concrete and the effect of mix proportion and other uncertain factors, the specific expression of n is very complex and needs further verification.

The Effect of Heat Treatment Temperature on Property and Structure of Ni Group Core-shell Particles ER Suokui TAN 1,2, a, Xiaoping SONG 2,b , li Qiao 1.c, Hongyan GUO 1,d, Song JI 1,e, Hong ZHAO 3,f 1Ningbo Branch of China Academy of Ordnance Science, Ningbo，China 2 Xi，an Jiaotong University，Xi，an China 3 Dalian University of Technology, Dalian, China atansuokui@126.com, bxpsong@mail.xjtu.edu.cn, cQiaoli040920@163.com , dnbguohongyan@163.com，ejisongnb@126.com，fzhaohong@dlut.edu.cn Key words：Electrorheological fluid, Morphology, Particle concentration Abstract：By means of mechanical properties test and microstructure graph observation，the relationship of heat treatment temperature of core-shell Ni/TiO2 group particles with mechanical properties under different electric field has been researched .It is found that the FT-IR，XRD morphology of heat treatment at350℃ is different from the one at100℃，the shear stress of same composition ER decreased with heat treatment temperature increasing
The heat treatment temperature of particles is one of most important of many factors affecting the ER property.
But the particle shows different structure and properties because of different modifier polar molecule giving different behaviour after heat treatment, and decides the properties of ER modified by Urea、SDBS、TEA and etc [3].
This paper focuses on the research of heat treatment temperature and structure, properties of electrorheological fluid under different electric fields. 1.
Conclusions The temperature of heat treatment of ER particles is very important factor on the structure and properties, Ni/TiO2/Urea particles would have heat treatment under 150℃, the higher of heat treatment temperature, the lower of ER property.