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Hot deformation behavior of as-cast 300M steel was investigated in the temperature range of 850-1200℃ and strain rate range of 0.01-10 s-1 using Gleeble-3800 thermo-mechanical simulator.
Microstructure evolution is greatly affected by deformation temperature and strain rate.
Introduction 300M steel as a medium carbon low-alloy ultra-high strength steel was modified by adding the alloying elements of 1.6%Si and 0.1% V in 4340 steel [1], widely used in key bearing structural parts such as aircraft landing gear owing to its high strength, high fracture toughness and excellent fatigue properties [2] Many aircraft landing gears are made of 300M steel, such as Boeing 787, Airbus A380, C919 and C929.
It is well known that the friction between the sample and dies will affect the symmetrical deformation of the samples.
Therefore, the above-mentioned friction correction method can reduce the error caused by the unavoidable factors during the experiment.

The mechanical properties of them were measured using a texture analyzer.
Not only drug but type of solvent was also the crucial factors for this phenomenon.
The mechanical properties were examined quantitatively using a texture analysis.
Furthermore the alignment of DXP matrix explicitly disconnected at the end of time interval as the results of degradation and mechanical properties.
In situ forming implants for periodontitis treatment with improved adhesive properties.

Excess UV exposure damages plant DNA, negatively affecting growth [3, 28-31].
This causes a loss of mechanical properties, reduced functionality, and reduced lifespan.
Aggregation also creates weak points in the composite thereby weakening the mechanical, thermal, and electrical properties of the product.
Albdiry, Effect of melt blending processing on mechanical properties of polymer nanocomposites: a review, Polym.
Andronic, Synergic Effect of TiO2 Filler on the Mechanical Properties of Polymer Nanocomposites, Polymers (Basel) 13 (2021) 1-24

Then an in-depth analysis on key parameters affecting the detection has been done, and detection resolution of radar are researched.
Dielectric conductivity affects the detection depth of electromagnetic wave.
Permittivity affects propagation velocity of electromagnetic wave in the medium.
The resolution means the capability of minimum target recognition of radar.It is depend on the wavelength of medium.In general,the minimum resolution is in theory.Taking into account factors such as environmental interference,we take as the minimum resolution in practice
Because of the effect of gas,water,ground pressure,roof and other factors,it has great danger on excavation heading face of coal roadway underground coal mine.Mining disaster often happen.Coal roadway excavation has become heavily dangerous industries.If use GPR to detect advanced before excavation,find out abnormal condition of excavation face,it will be great importance in taking safty measures advanced,ensuring safe production and preventing sudden accident.

The brittle property of IMCs caused the strong stress concentration effect during the mechanical impacts [2,4-15] and thermal cycles [1,3] The cracks were found to initiate and propagate near the IMC layers.
Past studies in the solder joint failure Many factors are affecting the fracture toughness of solder joint, such as solder joint thickness and crack location related to interface of solder joint.
Alam et al. [4] has showed that the stress intensity factors (SIF: KI and KII) increases with the thickness of solder alloys at the loading rate of 0.8 MPa/s for the crack located at 1μm distance apart from the IMC-solder interface.
Specifically, factors which include package size, solder type, model type, experimental parameters (ATC), computer simulations (mesh size) affect the results.
Conclusion Many studies have been carried out on the effect of fracture factors on solder joint failure like solder thickness, IMC thickness, crack location, crack length, electric current density, strain or loading rate and temperature cycle.

Their excellent specific mechanical properties make them ideal as reinforcement in many different kinds of material.
Magnesium-based MMCs have shown high specific mechanical properties [14], low density, improved thermal and dimensional stability and better damping properties.
Goh et al. have studied the mechanical, physical and thermal properties of Magnesium-CNT nanocomposites.
The fact that MWCNT clusters are strong and difficult to break, using mechanical means, may also affect homogeneity of the powder mixture and the reproducibility of material properties.
Tan, in Aluminium Alloys; Their physical and Mechanical Properties edited by J.

Fracture Toughness Calculation by Movable Cellular Automata Method Mikhail Pak a, Choon Yeol Leeb and Young Suck Chai c School of Mechanical Engineering, Yeungnam University, Gyongsan, 712-749, Korea a parkms@yandex.ru, bcylee@yu.ac.kr, cyschai@yu.ac.kr Keywords: Fracture Toughness; Stress Intensity Factor; Movable Cellular Automata Method; Edge-Cracked Specimen; CCT Specimen.
In case of the same material properties of i-th and j-th automata the ultimate strength sσ is used as a threshold value: Unlinked, when i s ijij K σσ ≥int
(5) In general case automata in i-j pair consists of different materials with different physicochemical properties.
In case of the same material properties, ij K =1.
Table 1 Mechanical properties of selected materials.

In lapping, the velocity is one of the vital factors.
In the process of polishing, the properties of polisher material and abrasive powder are the essential conditions to ensure the super-smooth surface.
Experiment shows that the process parameters affecting surface roughness and lapping efficiency are abrasive properties and size, concentration of lapping slurry, lapping speed and lapping pressure, etc.
The lapping parameters (lapping speed and lapping pressure) affecting stock removal of KTP are changed, and the relations between stock removal and the parameters are in Fig.1 and 2.
(4) The properties of the polisher material and abrasive powders are essential conditions to ensure the super-smooth surfaces

Injection of PTX has been shown to influence the bone biomedical properties [11] and calcified mass [8] in a dose-dependent manner.
Oral gavage of PTX to osteopenic rabbits affects thebone mass, strength and mineral properties [12].
Due to its properties like biocompatibility, bioactivity and osteoconductivity, HAP has an important role in bone defect repair.
In vivo injection of PTX increases the mechanical stiffness of the bone through its anti-osteoporotic property [5].
All these evidence indicate the positive effects of systemic administration of PTX on bone formation in cooperation with the other osteogenic factors.

Metal Rubber made by the specific process has excellent mechanical properties.
The wire diameter is decided by the size of products, mechanical and hydrodynamic properties.
The resilience amount of wire is related to the size of the material, material quality, the size of spiral roll and other factors, so the mandrel diameter is difficult to determine.
The concrete mechanical structure is shown in figure 3.
[2] Hongyuan Jiang, HongRui Ao, Yuhong Xia: The mechanical design and manufacturing(2001)