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The enhanced mechanical properties of crystalline materials are linked to very small grain sizes.
The room temperature mechanical properties of the extruded alloy are investigated through hardness measurements and tensile tests.
Alloy 8090 has 10% lower density and 11% higher modulus than these conventional counterparts, and 8090 exhibits superior mechanical properties at cryogenic temperatures.
Experimental Results and Discussion Properties Characterisation.
With a nanoindenter, mechanical properties can be measured.

,LTD, Beijing 100088 a10115295@bjtu.edu.cn, b10115286@bjtu.edu.cn, cmzhbai@bjtu.edu.cn, dzhyxu@bjtu.edu.cn, e yjj.good@163.com Keywords: stability; numerical simulation; strength reduction; seepage Abstract: Landslide instability has plenty of influential factors.
Introduction Landslide instability has plenty of influential factors.
When analyzing landslide seepage, we have to take into consideration various influential factors, such as rain capacity, duration, intensity, soil layer permeability, strength of soil with different water content, intact border condition, initial condition, etc.
However, affected by long period stress, the ground layer along the front edge of the slope has emerged obvious shearing fault belt.
Thus, during heavy rainfalls, slope displacement should be timely monitored mass, protecting people’s lives and properties via mass prediction and disaster prevention.

But its physical and mechanical properties are short comparing to metal pipeline, which limits its promotion in the oilfield.
It has good properties of electrical insulating and chemical stability.
At the same time pipe insulation needs to be made on the spot, affecting its thermal performance.
According to field repair analysis, there are five factors to the pipeline leakage reasons, as shown in Table1.
Anti attenuation rate of pipe mechanical property = (initial amount of pipe mechanical property-Termination amount of pipe mechanical property) / initial amount of pipe mechanical property.

Introduction Carbon fiber reinforced plastics (CFRP) are widely used in aerospace, sports, health care and other areas, owing to it having excellent properties such as light weight, high specific strength, high specific modulus, good wear-resistance, etc.
Their material properties are listed in table 1.
Table 3 could conclude that the four factors affecting flank wear in a descending order as: spindle speed, cutting width, feed rate, and interaction.
Table 5 could conclude that the four factors affecting flank wear in a descending order as: interaction, feed rate, spindle speed, cutting width.
The four factors affecting flank wear in a descending order as: interaction, feed rate, spindle speed, cutting width.

Powder metallurgy is a new method for mass production of precision components with appropriate mechanical properties, but in this kind of materials (PM parts) with special microstructures (pores act as local stress risers), fracture due to fatigue is expected as an important destructive factor.
Fatigue is a complex phenomenon influenced by numerous factors.
The resistance against fatigue failure, in common with all other properties of such materials, improves as the porosity is reduced [5-7].
Therefore, fatigue crack growth is governed by local mechanical properties in the region of crack tip [11].
The effect of homogeneity/heterogeneity on fatigue properties is subjected to different opinions.

Variable amplitude loading under different form of spectrum has affected highly the fatigue life and fatigue crack growth rates.
Introduction Fatigue crack growth behavior of metals depend upon a number of variables namely the mechanical properties, specimen geometry, environment, applied cyclic loading, stresses and strains acting at the crack tip.
The basic mechanical properties for theses materials are presented in Table 1.
Mechanical properties of aged hardening Al-alloys (Afgrow database) Materials se (MPa) E (GPa) KC KIC 2024 T351 372.31 73.08 74.72 37.36 2219 T87 393.0 73.08 65.93 32.97 7075 T7351 427.47 71.70 63.73 31.86 7178 T7651 496.42 71.70 61.54 30.77 where se, E, KC and KIC represent respectively the yield strength, young’s modulus, plane stress fracture toughness and the plane strain fracture toughness.
The model use an "effective" stress intensity factor based on the size of the yield zone in front of the crack tip.

In this paper, mechanical property parameters of ceramic materials, including hardness, fracture toughness and elastic modulus, were selected as machinability attributes.
The machinability of materials mainly depends on its mechanical properties.
Table 1 Mechanical properties of ceramic materials Ceramics A12O3 SiC ZrO2 Si3N4 Hardness HV [GPa] 18 20 13 16 Fracture toughness KIC [MPa.m1/2 ] 3.5 4 7.6 6 Elastic modulus E [GPa] 350 410 200 280 Digraph Model for Machinability Evaluation Machinability Attribute Digraph.
For example work material (i.e., physical and chemical properties, etc.), cutting tool material, cutting conditions (i.e., speed, feed, depth of grinding), tool wear, grinding forces, surface roughness, etc.
There are lots of machinability affecting factors of ceramics, for a simplified calculation, three property parameters Hv, KIC and E are selected as machinability attributes.

However, there are a variety of factors that can affect the MFL inspection tool’s ability to detect and characterize anomalies.
There are also a number of factors that affect the results of MFL signals.
They include, but are not limited to defect geometry, MFL apparatus itself, magnetic properties and test parameters such as velocity.
However, MFL signals obtained from FEA models are different from experimental signals, which is attributed to different magnetic properties.
The contributing factors and importance on MFL signals for different defects are also shown from the results of experiments.

Introduction In the injection molding production, because of the plastic melt flow properties vary greatly, the structure of the mold products and ever-changing process conditions vary, molding defects are also a wide range, limited empirical formula alone and simple design criteria is difficult to these factors make comprehensive understanding and grasp.
Therefore, the plastic material selects polyamide (PA66 Ultramid A3K: BASF), and the material properties are shown in Tab.1.
Tab.1 Material properties Melt Density 0.94627 g/ cm3 Solid Density 1.1322 g / cm3 Ejection Temperature 180 ºC Recommended Mold Temperature 50 ºC Recommended Melt Temperature 290 ºC Absolute Max.
The presence of weld lines will affect the workpiece surface quality, mechanical properties, will cause serious parts scrapped.
The deformation of causing the biggest factors is the contraction of its plastic parts.

The remnant liquid forms an amorphous grain boundary phase which degrades the mechanical properties of the material at temperatures > 1000°C because of drastic softening of the grain boundary regions. 1.2 β-Si3N4 Si3N4-based materials display a combination of properties that result in superior resistance to wear, thermal shock and mechanical stress.
This will especially enhance the chemical and mechanical properties at elevated temperatures.
Thus the extent to which the above four factors influence thermal behaviour may vary as the stabilizing cation is changed.
Physical properties like high thermal conductivity, low dielectric constant and loss, high electrical breakdown strength, high compressive strength and low thermal expansion co-efficient are the main factors for the versatile applications of AlN ceramics.
Pronounced prismatic cleavage is, therefore possible in this material, which is supposed to influence the ultimate mechanical properties at high pressure [35].