Search results

After sintering, all the physical, chemical and mechanical properties of green body will change, such as bending strength, density, crystal shape, composition and et al.
Further research was also needed, such as grain size and microstructure observation with scanning electron microscope and the other mechanical properties test.
[6] Takaki M, Mechanical properties of toughened ZrO2-Y2O3 ceramics, Journal of America Ceramic Society, 69 (1986) 638-640
Sintering , microstructure and mechanical properties of commercial Y-TZPs.
[8] Tsukuma K, Kubota Y, Tsukidate T, Thermal and mechanical properties of Y2O3-stabilized tetragonal zirconia polycrystals.

Microstructure and Mechanical Properties of 60Si2Mn Steel after Austenite Inverse Phase Transformation by Sub-temperature Quenching Anming LI 1,a, Mengjuan Hu 1 1School of Materials Science & Engineering.
Henan Polytechnic University, Jiaozuo 454000, China aanmingli2001@sina.com Keywords: 60Si2Mn steel; Inverse phase transformation; Tensile strength; Hardness; Microstructure Abstract: Microstructure and mechanical properties of 60Si2Mn steel by 870 ℃ prequenched and second sub-temperature quenching was studied.
The mechanical properties of the 60Si2Mn steel after 870 ℃ prequenching and second sub-temperature quenching are better than that of conventional samples after 870 ℃ quenching.
It can be seen that the mechanical properties of 870+800 ℃ twice quenched sample are better than that of 870 ℃ once quenched sample.
Austenite inverse transformation sub-temperature quenching can improve the mechanical properties of 60Si2Mn steel.

Standard mechanical tensile and bending properties were determined, the latter for assessing SCC.
Mechanical and Corrosion Properties The properties of all investigated austenitic stainless steels are given in table.
As you can see the Cr-Ni-Mn-N-steels, in addition to austenite, contain a small amount of d-ferrite in the structure, which can adversely affect their magnetic properties.
Ren, Mechanical properties of 32Mn-7Cr-0.6Mo-0.3N austenitic steel for cryogenic applications, J.
Robinson, Evaluation of corrosion and mechanical properties of a range of experimental Cr-Mn stainless steels, Mater.

We use quartz crystal material from a physical point of constitutive equations derived in detail combined with the boundary conditions of the liquid Kanasawa QCM response model and Martin correction BVD equivalent circuit model; then apply transmission line theory and the theory of Acoustic impedance load, the research results can be useful as a QCM-D model, response model and Martin mode, then in-depth analysis of the liquid phase conditions, factors affecting the QCM frequency change, we propose a new method for measuring the density of the unknown liquid viscosity supplement.
Transmission line model can be caused by mechanical displacement of sound waves into electrical signals, and vice versa.
Due to the unique properties of quartz crystal material, making the quartz wafer by the external electric field frequency is an even multiple of its natural frequency, polarization-induced excitation average charge equal to zero, resonance does not occur.
Utilizing this property can be extended to obtain: quality quartz crystal frequency offset its surface adsorbed is linearly proportional.
Figure.3 Load impedance of QCM with frequency Thus, closely related to the acoustic load material properties change with sheer mass deposition, the deposition process or quality, changes in material properties or by the chemical adsorption, physical effects.

Cold rolling and hot galvanized steel sheet of DX51D+Z was chosen as the welding material, table 1 listed its chemical composition and mechanical properties: Figure 1 schematic diagram of tensile specimen size Table 1: Chemical composition and mechanical property of DX51D+Z Card No. chemical composition（%） C Si Mn P S Alt DX51D+Z ≤0.07 ≤0.03 ≤0.5 ≤0.025 ≤0.025 ≥0.02 Card No. chemical composition（%） C Si Mn P S Alt DX51D+Z ≤0.07 ≤0.03 ≤0.5 ≤0.025 ≤0.025 ≥0.02 The selection of orthogonal test largely impacted the welding quality, and the machine operation interface of resistance welding made the adjustment of five influencing factors easier, including welding current, welding time, welding stress, preloading time, maintaining time.
Based on the early single factor rotation method, relatively optimal parameter values of the five factors were obtained, then four levels of each factor in the vicinity of them were given, as be shown in table 2.
that impacts the quality of solder joints of the five factors; then is the welding pressure, welding time, preloading time, while maintaining time is relatively the weakest impact factor.
The average tensile shear loads T1, T2, T3, T4, T5 value attained from experiments at different levels shown the corresponding value of the welding current under four levels was scattered, and had the greatest impact on the mechanical properties of the welding spot, while the best level of the welding current was about 11440kN; the best level of the welding pressure was 0.25MPa; the best level of the welding time was 18cycles; the best level of preloading time was 40cycles; all above was according to the influence to the welding joint mechanical properties; the corresponding value of maintaining time under four levels was relatively concentrate, and had a smaller impact on mechanical properties of the welding spot, its best level was 10 cycles.
Conclusions (1) The experimental analysis shows that the welding current impacts on the mechanical properties and quality of the welding spots heavily, then is welding pressure, welding time, preloading time, maintaining time.

The interaction process between cutter-head and rock is affected by the factors such as the acting loads, line spacing of two adjacent cutters, and rock properties that impact the angle and extension of cracks under the crushed zone.
Table 1 lists the physical properties of some rocks.
The interaction process between disc cutters and rock body is affected by the many factors, such as the acting loads, line spacing of two adjacent cutters, and rock properties that impact the angle and extension of cracks under the crushed zone.
Table 2 lists rock mechanical properties for the simulation.
Fig.2 Finite element model for simulating rock fragmentation progress Table 2 Rock mechanical properties for the simulation Density.

The materials used are AA 8011 and AA 6061.The factors compared in this process are the weld quality, different welding feed and rotation speed.
This is mainly due to the presence of mechanical properties which are superior to plasma arc welding. 1.
Defect free welds with superior mechanical properties have been made in a variety of aluminum alloys.
Okitsu (2013) ‘Microstructure and mechanical properties of dissimilar Al alloy/steel joints prepared by a flat spot friction stir welding technique’, Vol.47, PP. 350–357
Chen(2013) ‘Microstructural evolution and mechanical properties of dissimilar Al–Cu joints produced by friction stir welding’, Vol.51, PP. 466–473

The results indicate that when the ratio of soft and hard monomer is in the range of 1:1~2:1 and the amount of cross-linking agent is added, the comprehensive properties of acrylic emulsion are good.
During this process, effects of the ratio of soft and hard monomer and the amount of cross-linking agent on emulsion properties were discussed.
Under a given set of other factors, different ratios of soft and hard monomers were changed (Table 1) and then a series of polymer emulsion with core-shell structure were synthesized.
When the ratio of soft and hard monomer is in the range of 1:1~2:1 and cross-linking agent is added, the comprehensive properties of acrylic emulsion are good.
The ratio of soft and hard monomer and cross-linking agent can affect the performance of coatings.

The temperature and Residual Stress Distributions of Butt Weld Pass on Nickel Alloy 690 Plate Chun-Ho Yin1,a, Chao-Ming Hsu2,b and Jao-Hwa Kuang1,c 1Department of Mechanical & Electro-Mechanical Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan, 80424, R.O.C. 2Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, Taiwan, 80778, R.O.C.
The temperature dependent material properties are used.
Thus, welding quality is one of the key factors influencing the reliability of the structure. [1] In 1998, Murugan et al. [2] used finite element method to simulate the possible effect of welding parameters; i.e. parent metal thickness, parent metal material, number of weld passes, weld speed and welding heat input, on the variation of temperature profiles during welding.
The heat affected zone of double-layer weld pass is greater than single-layer weld pass. 2.
With the same number of weld passes, heat affected zones decreases with the increase of weld speed. 5.

The influences of four types of sintering additives on the microstructure and mechanical properties of the porous Si3N4 ceramics were investigated.
Effects of different sintering additives on microstructures and mechanical properties of porous Si3N4 ceramics were investigated.
Because of the similar green porosity, the linear shrinkage and weight loss are two main factors determining the porosity of the sintered samples.
Due to the well developed microstructure, samples La, Y, and Lu showed outstanding mechanical properties of 2-7 MPa, considering of the high porosity of 74-79%.
The influences of sintering additives on microstructure and mechanical properties were investigated.