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It is mainly composed of martensite, residual austenite large grains and some fine carbides. 3.The metamorphic layer influencing factors (1) on the punch and die material microstructure and elemental composition study found that spark discharge effect, cause the material of the surface layer microstructure has undergone significant changes, the formation of discontinuous, metamorphic layer of uneven thickness.
As EDM process is random in the same processing conditions, the thickness of the affected layer tends to be uneven.
Wire cutting starting point is also important and should be selected relatively flat, easy to finish, or material properties of the punch and die set is not the site of the starting point for the line cutting.
Increase the mechanical design of the reform measures [J].
Mechanical Design [M].

The experimental results above show that the carbon content is the main factor to affect the morphology of martensite in steel.
The new phase martensite keeps semi-coherent relationship with the parent phase austenite during the formation of martensite in steel and there are high density dislocations in the phase interface, so the strain energy depends on the volume difference between the new phase and the parent phase, the shape of the new phase and the mechanical property of the parent phase [1].
So carbon content is the main factor affecting the morphology of martensite.
Conclusions (1) The carbon content is the main factor to affect the morphology of martensite in steel.
Trans., Vol. 2(1971), p.2373 [9] Zhaoji He: Mechanical Properties of Metal (Metallurgical Industry Press, Beijing 1982) (In Chinese).

Wang Fig.5 Failure Mode Fig.6 Influence of mechanical properties Analysis of the finite element method.
Therefore, to study the influence of change in mechanical properties on the deflection of the beams, mechanical properties before and after welding were used.
It may be appreciated that there are differences in mechanical properties between flange and web (as Table 2), and since the flange contributes more to the bending member, the mechanical properties of flange were used to get the deflection.
Therefore, it can be concluded that the process of welding affects the mechanical properties of stainless steel, making the proportion of plastic deflection increase and nonlinearity more obvious.
The load-deflection curve calculated by mechanical properties after welding matches better with experimental results.

Introduction As one kind of potential structure materials which can be used in high temperature, TiAl alloys have shown high specific strength, high specific stiffness and excellent mechanical properties in high temperatures [1].
And the sandwich structure made of TiAl alloys has shown greater carrying efficiency and high temperature mechanical properties, which have demonstrated broad applications in the manufacture of aircraft fuselage, thermal protection system and so on [2,3,4].
However, the superplastic deformability of the TiAl sheet is determined by several complex parameters, such as the friction between metal sheet and mold, the size and shape of mold, material properties and loading process.
All these factors can lead to nonuniform thinning or rupture of the sheet, which limits the application of sheet superplastic bulging.
Table 1 Structure parameters of the 1/4 model Length [mm] width [mm] height [mm] Thickness of sheet [mm] Radius of mold fillet [mm] Side wall rake [1] 30 26 13 1 3 0.154 Material properties.

Properties of AMCs can be tailored by varying the nature of constituents and their volume fraction.
The machined surface quality of composites is one of the most important concerns affecting the actual application of the composites [3].
Table 1 shows the chemical composition and properties of reinforcements of AMCs used for this purpose.
All of these factors deteriorate the surface roughness and influence the measured values.
Ye, The effect of machining on the surface properties of SiC/Al composites, Journal of Materials Processing Technology, 138 (2003) 464–467

Introduction Shear connection plays an important role in the mechanical performance of composite steel and concrete structures.
In order to accurately understand the mechanical properties of shear studs in composite beams, experimental study was carried out.
In the design specifications, the reduction factor is calculated by the sizes of troughs of the profiled sheeting.
But the heat affected zone is still the weak area.
Additional welding can enhance the heat-affected zone, ensuring the welding completely reliable

The mechanical properties of the triblock copolymers were investigated in comparison to the P(nBA-co-St) statistical copolymers.
Modern polymer science revealed that the synthetic polymer properties (i.e. mechanical, rheology, etc) were dependent on chain sequence structure other than compositions [7].
The mechanical properties were measured by univeral material tester (Shimadzu AG-I) following the method in GB16421-1996.
However, being likely due to the experimental factors, clear microphase-separated morphology was only observed in the sample TC1 (30K-180K-30K).
However, their mechanical properties are quite different.

Therefore, proper method of stress-strain monitoring of the key components while construction of steel structure workshop, become particularly important factor to ensure the safety of construction process.
Main material of steel beam Table 1 Chemical composition and mechanical property of Q235B The steel beam which was monitored in this paper was made of Q235B.The chemical composition and mechanical property of Q235B are listed in Table 1.
The main monitoring parameters (1) Considering the strength factor, vertical direction displacement value should not more than 10mm according to the design requirement
(3) Deflection measurement method: measuring deflection values real-time while dismantling each beam, the need for, because of the position of each beam is very high, build a support frame also easily affected by the interference of construction and other factors, so it is to be adopted corresponding to each point drape a lead fall to deliver the deflection change, which cause transfer deflection not synchronous, accounting calculation, relative error time less than 50ms, therefore, the scheme is feasible.
According to the mechanical characteristics analysis of the structure of steel beams, suffer uneven loading, which will bending stress and torsional stress, so combined two beams form the closed thin section range, to ensure the bending capacity and reduce the influence of torsional stress

RFW, widely used in the aerospace and automotive industries, is known for producing strong welds with minimal heat-affected zones (HAZ).
This alloy, primarily composed of aluminum, magnesium, and silicon, offers mechanical properties suited for structural applications.
Accurately capturing the thermal-mechanical changes throughout the welding process is essential.
Key factors like axial shortening, temperature distribution, and stress distribution were well captured, demonstrating the model’s reliability in reproducing physical conditions.
Effects of rotational speed on the mechanical properties and performance of AA6061-T6 aluminium alloy in similar RFW. 

The interest in studying nano sized particles lies in its ability to produce single phase BHF which could affect value of its crystal parameters as well as affecting its overall physical properties.
As we know, a lot of factors affect the characteristics of BHF such as synthesis method, the ratio of Ba2+ to Fe3+, as well as the molar ratio of citric acid to the metal nitrate, pH in starting solution, the annealed temperature, etc.
In this research, we investigated the influence of molar ratio Ba2+/Fe3+ on shifting of diffraction peak which absolutely affected lattice parameter as well as the overall magnetic properties.
The water solution was left to evaporate at 80oC with continous mechanical stirring until a sticky and foamy gel was obtained.
There are no traces of impurity phase α Fe2O3 and intermediate phase BaFe2O4 which are canted antiferromagnetic may contribute to the reduction of magnetic properties.