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Thermal Simulation on Mechanical Properties of Steel Q345for Continuous Casting Slab∗∗∗∗ D.F.
Introduction The quality of Continuous Casting slab is one of factors which influence the quality of steel [1-3].
The factors of continuous casting process can influence the quality of Continuous Casting slab.
Mechanical properties are the characteristic response of a material to applied forces.
At present, a few mechanical properties of Steel are public for rolled metals, but they are not system.

Dentine has different morphology near the enamel and in the inner part thus mechanical properties progressively change in correspondence of structure variation.
Furthermore, dentine exhibits time-dependent properties like creep and stress relaxation [7-11].
In this work different experimental techniques have been employed to measure the mechanical properties of dentine.
The imprint size allows an accurate mapping of mechanical properties but, at the same time, is large enough to avoid large scattering of data.
Therefore, FIMEC proved to be a reliable methodology to measure the mechanical properties of dentine on a local scale.

Stress intensity factors are widely used as the main factors for controlling the fracture behavior of materials(6).
The material used here was medium carbon steel S45C (be equal to No.45 steel in China).The chemical composition and mechanical properties are shown in table 1 and table 2 individually.
Fig.1 Dimension of the specimen with jig for manufacturing slant crack Table 1 Chemical composition mass% C Si Mn P S 0.47 0.22 0.70 0.015 0.019 Table 2 Mechanical properties Fig.2 Dimension of the specimen with slant crack Residual stress measurements The residual stress distribution along the fatigue crack was measured by moving an X-ray beam with an area of 1×1mm2 intermittently on the specimen surface.
This is because the mode Ⅰbehavior is affected by residual stress mainly.
For fatigue cracks with different slant angles, the ratio of modeⅠstress intensity factors (KⅠ)mes/( KⅠ) are not affected by change of the slant angle and show the same value approximately.

During storage, heat and oxidative aging is the most pervasive factor impairing the mechanical properties.
After heat and oxidative aging, the HTPB coating’s cross-linked network is destroyed, and the mechanical properties will deteriorate [2].
Aging of rubber materials will affect other mechanical properties, for instance dynamic properties.
The dynamic mechanical properties after aging were tested in the frequency range of 0-100Hz.
Xie, Experimental investigations on the dynamic mechanical properties of aged rubbers, Polym.

These defects could affect the properties of the welded joint.
This phenomenon can lead to hole defects in the weld and affect properties of the welded joint [11].
Jiao, Microstructures and mechanical properties of 6082 aluminum alloy joints welded by FSW, J.
Dong, Microstructure and mechanical properties of friction stir welded joints in 2219-T6 aluminum alloy, J.
Zhang, Influence factors of dynamic recrystallization of 7050 aluminum alloy friction stir weld, J.

The influences of processing parameters on the mechanical properties of KGM films were investigated through orthogonal experiments.
However, KGM membrane is not widely used because of its poor mechanical strength and water-resistance properties, anti-bacterial and anti-corrosion [1-4].
The effects of processing parameters on the mechanical properties of KGM films were investigated.
The mechanical properties of KGM film was measured on the ZL-300 Bob-paper tensile testing machine and the ZZD-025C E-paper-folding tester.
Fig.3 Range comparison of factors affecting on tensile strength of modified KGM membranes Fig.4 Range comparison of factors affecting on folding endurance of modified KGM membranes As can be seen from Figure 3, it is obvious that the addition amount of MA has the most important effect on tensile strength, while swelling temperature influence is the least.

The basic characteristics of the space environment and the complexity of tear damage mechanism are introduced, and this presentation also summarizes the research status of the tear damage mechanical mechanism and damage properties under the influence of the multiple space environment factors of high-performance airship envelope.
Affected by ultraviolet ozone factors, high performance yarn bundle presents photolysis; surface morphology change; optical properties; bearing capacity reducing; accelerates aging, degradation and low temperature embrittlement under high and low temperature alternating.
Bending fatigue mechanical properties of fiber bundle under light heat and UV effect got research.
High strength fiber Kevlar is eager to degradation of the mechanical properties under ultraviolet light.
Actually, tensile stress fatigue and bending fatigue further affect tear damage properties under overpressure condition.

Bi5Sb solder alloy with the melting point of about 280℃ has bad solderability and mechanical properties.
In the present work, the new BiSbCu ternary alloy was prepared by adding different contents of Cu to Bi5Sb solder alloy to improve its solderability and mechanical properties.
There are plenty of factors to impact the wetting property of liquid solder.
[8] YAN Yan-fu, LIU Jian-ping, SHI Yao-wu, et al.Effect of Ag and Ni particles on mechanical properties and wettability of SnPb composite solder[J].
Effect of Ag and Ni Fine Particles on Mechanical Properties of SnPb Composite Solder[J].Rare Materials and Engineering. 2005, 34(4):622~626

However, the research of FSW mostly focuses on mechanical properties of the weld material, a series of materials such as aluminum and copper have acquired great success, but the optimal research about the friction stir tool is still little.
A few major factors affecting FSW process, such as spin tool geometry, welding parameters, selection of tool material are addressed.
The mean analysis is performed based on the Signal/Noise ratios at quality characteristics of tensile properties, and is used to efficiently explore the important FSW factors that affect the quality of the welds The ranking in Table 1 further demonstrates that factors C,G, E, and F have relatively strong impact on functional variability, while A,B,D, and H have a relatively weak impact.
On the other hand, it suggests that the best levels for each control factors are A1, B2, C3, D3, E2, F1, G2, and H3 due to their high S/N ratios.
The optimal tool shoulder is found to be a cylindrical-screw type, which resulted in better mechanical properties such as the tensile test.

By improving and optimizing the welding technology of heavy and heavy parts of low alloy high strength steel, we can effectively avoid the cold crack and overheating of heat affected zone in the welding of heavy and heavy parts of low alloy high strength steel, and greatly improve the mechanical properties of welded joints.
Introduction Because low alloy high strength steel has high strength, good weldability and excellent comprehensive mechanical properties.
Low-alloy and high-tempered high strength steels usually obtain better mechanical properties by quenching and tempering [2].
These temperature parameters will have an important impact on the mechanical properties and crack resistance of joints .
In this way, the cooling rate of each weld is higher, and the secondary weld has heating effect on the front weld, resulting in tempering effect, which refines the structure of the weld metal and heat affected zone, and improves the mechanical properties of the weld.