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The determination of retained austenite of the HAZ is important in optimizing the welding parameters when welding TRIP steels, because this will greatly influence the mechanical properties of the welding joint due to the transformation of residual austenite into martensite due to work hardening.
TRIP steels differ of conventional steels in their chemical and mechanical properties, resulting multiphase microstructures such as ferrite, bainite and retained austenite traces, this structure transforms to martensite, improving higher mechanical properties, with less thickness equivalent in resistance of conventional steels [3].
Experimental Procedure In this work TRIP 780 steel of 2.8 mm thickness was used with a chemical composition of 0.10 C%, 0.002% S, 1.98 Mn, 0.002 % P, 2.35 % Si, 0.06% Cr, 0.04% Ni, 0.03% Mo, 0.012% Cu, 0.019% V,0.004% Nb and 0.01% Ti and mechanical properties of 652 MPa Yield Strength, 854 MPa Tensile Strength and 20% of elongation.
[A] Voltage [V] Low T44 GMAW ER70S-3 0.09 DCEP 235-255 23.6 111.76 80 Ar-20 CO2 55 0.248 High T36 GMAW ER70S-3 0.09 DCEP 235-255 23.6 91.44 80 Ar-20 CO2 55 0.304 The filler metal used was microwire Lincoln ER70S-3 0.9 mm diameter with a chemical composition of 0.08% C, 1.20% Mn, 0.55% Si, 0.008% P, 0.008% S and mechanical properties of 405 MPa stress yield strength, 510 MPa maximum stress and elongation of 26%, to prepare welding joints two plates of 150 mm wide x 300 mm long in overlap of 25 mm was used, to subsequently deposit a fillet weld with parameters currently used in production lines which are the average values.
This method is known as direct comparison method uses intensity ranges austenite phase (γ phase) and ferrite phase (α phase) and the correction factors of the scattering intensity of each phase.

Measured resonant frequencies and quality factors of the magnetomotively actuated MEMS exhibit a dependence on the Ge amount at the interface of the Si/SiC heterostructure.
Introduction Due to its superior temperature and chemical stability, as well as biocompatibility and excellent mechanical properties SiC is a preferable material for high power/high temperature [1] and high frequency devices [2].
To analyze the mechanical properties fres and Q the magnetomotively actuated beam resonators have been measured in vacuum conditions by a differential technique in the frequency domain [8].
The effect of the changed layer quality on the elastic properties above 1 ML is under investigation.
Therefore, within a certain range a Ge coverage prior to carbonization and epitaxial growth allows to adjust the dynamic mechanical properties, i.e.

In CMP process, material is removed by synergistic action of mechanical wear and chemical reaction, and it is a very complex process that affected by many factors related to the polishing pad, the slurry, the wafer carrier structure and processing parameters.
Material removal rate (MRR) distribution is a major concern in CMP processing, and amount of research focused on finding the dominant factors that affect the MRR distribution and the effective method to improve the uniformity of MRR.
MRR in CMP process is dominated by mechanical wear and chemical corrosion, and these two factors affected by the physical properties and geometric parameters of polishing pad, wafer, and carrier.
To clarify this problem and to build effective model to predict the WIWNU, more factors need to be considered in the simulation.
However, it is still very difficult to develop a simulation model of CMP involving all the factors simultaneously.

The two processes determine different surface properties due to various mechanical and thermal loads in grinding and complex chemical reaction in etching pretreatment.
The chemical composition and mechanical properties of YL10.2 cemented carbide are given in Table 1.
In order to analyze the trend of the residual stress with respect to the variation of the factors under study, a fractional factorial Taguchi experiment incorporating two factors at two levels is employed, see test No.1 to test No.4 in Table 2.
The result showed that wheel speed is a significant factor affecting residual stress.
The wheel velocity from 20 to 30 m/s is a significant factor affecting residual stress in the cup wheel grinding.

Sc and Zr can further enhance mechanical properties of Al-Zn-Mg-Cu alloy [18-20].
This kind of change feature made alloy mechanical properties larger difference.
Microstructures and mechanical properties of Al-Cu-Mn alloy with La and Sm addition.
Effect of Y on Microstructure and Mechanical Properties of Aluminum Alloy.
Effect of Zr on Microstructure and mechanical properties of 2E12 aluminum alloy.

Different concentrations of nanoclay, 1wt%, 3wt%, and 5wt%, were added to urethane dimethacrylate, and their curing behavior and mechanical properties were determined.
In this study, 3wt% was the ideal concentration since it had better mechanical properties than the control and exhibited the best curing characteristic.
Nanoclay agglomerates can act as stress concentration points, negatively affecting their mechanical properties [2].
The factors that affected the curing characteristics provided information such as the least thickness and curing time per layer [4].
Comparison of mechanical properties of neat UDMA and MMT-UDMA in terms of (a) tensile strength; (b) Young’s modulus.

Another drawback of using natural fibres is that their final properties will depend on their composition as well as on agricultural and processing factors.
Bacterial cellulose, which has a diameter of around 20nm, exhibits excellent mechanical properties.
To study how bacterial cellulose affects the properties of loose flax/polypropylene composites, a set of experiments was conducted.
It was found not to affect the tensile properties of the composites, although further investigation into how annealing affects these composites and a pretemperature (used to allow hornification) influences the properties is needed.
Even though no improvement on the mechanical properties after adding bacterial cellulose was detected, the handling of the preforms was improved.

FATIGUE PROPERTIES OF ALUMINIUM ALLOYS FOR UNIAXIAL CYCLIC LOADS Ewelina Böhm1,a*, Tadeusz Łagoda2,b 1Opole University of Technology, Faculty of Mechanical Engineering, Department of Mechanics and Machine Design, ul.
The load for which we are able to state for an individual cycle his properties as for example its amplitude is called cyclic.
Lately, a stronger interest in aluminum alloys for use in structures has grown, and therefore it is necessary to know the mechanical properties of aluminum alloys, including fatigue behavior [5,8].
The results of the cyclic tests have proved that the corroding atmosphere reduces the strength properties of aluminum.
The analysis of literature included many factors affecting the fatigue life of the aluminum.

Copper and magnesium strengthen the alloy matrix and improve the mechanical properties.
Heat treatment is one of the major factors used to enhance the mechanical properties of heat-treatable Al-Si alloys, through an optimization of both solution and aging heat treatment given to these alloys.
An understanding of these factors and exploring the heat treatment differences between T5 and T6 for 319 alloys would help in selecting the metallurgical conditions required to achieve the optimum mechanical properties.
The 2k factorial design [10] is the ideal choice for providing information on the main effect and interaction of metallurgical factors on the mechanical properties of the heat-treated alloys.
Table 2 Factors and Their Uncoded Levels No.

On the contrary, our previous work [8] studied on effect of graphene and surface treatment of graphene which was the carbon nanoparticle as reinforcing filler in NRF/carbon composites that showed the excellent mechanical properties with low carbon content.
The mechanical properties in term of tensile strength at break, elongation at break and young modulus were explored.
These referred to the high cell foam density per unit volume of rubber foam composites which might affect the mechanical properties of NRF/carbon composites.
Kim, Effects of foaming temperature and carbon black content on the cure characteristics and mechanical properties of natural rubber foams, J.
Somwangthanaroj, Effect of graphene treated with cyclohexyl diamine by diazonium reaction on cure kinetics, mechanical, thermal, and physical properties of natural rubber/graphene nanocomposite foam, Polym.