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The results showed that the microstructure of X80 steel affected the properties of corrosion product layers.
Therefore, compactness of the deposit layer is a main factor that affects the protectiveness of the steel.
Conclusions Studies of the effect of the microstructure and corrosion time on corrosion properties of X80 pipeline steel in an alkaline sand soil has been carried out.
The corrosion morphology and properties of X80 steel were dependent on the integrality and compactness of iron oxide deposit layers which was through a physical blocking effect to afford the protection.
(d) The microstructure of X80 steel affected the properties of corrosion product layers.

Effects of High Yield Ratio on Material Properties of Pipeline Steel TingZhen Yao Materials Processing Engineering Key Subject of Xi'an Shiyou University Xi’an, Shanxi, 710065, China tzhyao@xsyu.edu.cn Keywords: Yield Ratio, X80 Pipeline Steel, True Yield Ratio, Static Toughness; Abstract.
Introduction Yield ratio is an important parameter of material properties, which is the ratio of yield strength to tensile strength.
It is related to the uniform deformation capacity and critical crack of material, the carrying capacity of pipelines and other factors.
The properties of X80 pipeline steel has been analyzed on the real yield ratio and static toughness.
Table1 Mechanical Test Result of Five Materials No.

The common methods to measure the setting time are the ones developed for concrete cements and provide some indication about the initial CPC setting rate but it is insufficient to characterize the whole CPC hardening process in terms of composition and mechanical properties [10,11].
So it can be concluded that the set of factors as lack of water, due the incubation in acetone, and temperature contributed to the stabilization of monetite phase.
In method I, the time to scan the whole sample was a limited factor.
Temperature dependent setting kinetics and mechanical properties of β-TCP–pyrophosphoric acid bone cement.
Hydraulic properties of tricalcium phosphate – phosphoric acid – water mixtures.

The variation in AC content was observed to impact crosslink density and mechanical properties, with an increase in crosslink density compared to neat NRLF.
NR is renowned for its exceptional flexibility and impressive mechanical properties, making it an ideal candidate to enhance both the practicality and performance of the composite material [13].
This innovative approach encompasses an in-depth exploration of the intricate interplay between various factors, including crosslink density, mechanical properties, morphology, and Pb2+ adsorption efficiency.
Agglomeration might occur in clustered regions within the foam, affecting the uniformity of structure.
The composite demonstrated enhanced porosity, well-dispersed AC networks, and improved mechanical properties, contributing to a maximum Pb2+ adsorption efficiency of 1.28 mg/g at 5 phr of AC.

For both steel pipe piles and concrete pipe pile joints, the codes don’t consider the dissolved oxygen, Anaerobic organism and other corrosion factors.
No matter it is for steel pipe piles, concrete pipe pile joints, or reinforcement concrete filling pile, this evaluation method that does not consider corrosion factors including dissolved oxygen, resistivity, anaerobic organism and so on is clearly unreasonable.
Table1: Parameters of physical and mechanical properties in Xiangshan Port seabed soil No.
But, the amount of Cl-and SO2-4,anaerobic sulfide and SRB index are the main factors affecting steel corrosion. 3.1 The Process of Corroding Cell.
The inorganic acids, organic acids, sulfides, etc. produced by the metabolism enhance the corrosivity of the environment, and create the conditions for the formation of micro cell corrosion such as local cell corrosion caused by the oxygen concentration difference on metal surface; 3) affecting the condition and property of the metal surface.

López1,2 1Ceit, Manuel Lardizabal 15, 20018 Donostia / San Sebastián, Spain 2Universidad de Navarra, Tecnun, Manuel Lardizabal 13, 20018 Donostia / San Sebastián, Spain abpereda@ceit.es, blgsesma@ceit.es, cblopez@ceit.es Keywords: High-Ti steels, Mechanical properties, Precipitation hardening, Microstructural characterization.
Introduction During the last years, many works have focused on the study of the mechanical properties of steels with high Ti levels, alone or in combination with other microalloying additions, since it has been reported that Yield Strength (YS) levels over 700 MPa can be attained while retaining a ferritic/bainitic matrix [[] Y.
However, it has been found that the mechanical properties of these steels are highly sensitive to variation in the processing route, leading to deviation in mechanical properties from coil to coil or along strip length and width.
Hardness measurements have been also performed to estimate their mechanical behavior and define the range of mechanical property stability.
However, it is worth noting that variation of the mechanical properties with coiling temperature is more marked for this steel.

The softening of tensile friction stresses is the main factor of cyclic creep.
Experimental materials and the experimental methods Ti-6Al-4V titanium alloy with (α+β) phase was selected in the experiment, which chemical composition and mechanical properties of materials are shown in Table 1 and Table 2.
Table 1:The chemical composition of theTi-6Al-4V alloy Al V Fe C N H O Ti-6Al-4V 5.5～6.8 3.4～4.5 ≤0.3 ≤0.1 ≤0.05 ≤0.015 ≤0.2 Table 2:The mechanical properties of theTi-6Al-4V alloy at room temperature δb(MPa) δ0.2(Mpa) δ(%) ψ(%) 895 825 10 39 Fig.1 The structure and dimensions of specimen (mm) Fig. 2 The hysteretic loop of Ti-6Al-4V first cycle of the cyclic stress-strain Effect of Strain on the Sow-cycle Fatigue Properties The Hysteretic Loop of Cyclic Stress-strain.
(a) δε/2=1.6% (b) δε/2=2.4% (c) δε/2=2.8% Fig. 5 The friction stress and the back stress under different strain Effect of Stress on the Low Cycle Fatigue Properties The peak and valley value of strain of Ti-6Al-4V alloy under different stress are shown in Fig.6.
The friction stress is the mainly factor to affect the cyclic creep deformation.

Introduction Titanium alloy has high strength, high temperature strength, corrosion resistance and other excellent properties, so it is widely used in the aero technology.
Therefore, by selecting the appropriate tool materials the cutting property can be improved.
The chemical elements of PCBN cutting tools and titanium alloy contact surface could spread to each other, which can change the chemical composition of the both and affecting its performance.
The hard alloy particles(Fe and Si) scratch the surface of the tool, which caused tool wear by mechanical friction is one of the most common wear and tear factor The hard particles of titanium alloy and the bonding effected will lead to PCBN tool micro-chipping.
Above all of wear factors influence each other and promote each other, such as, with the proliferation of diffusion wear and oxidation wear, and increase mechanical wear while promoting fracture wear and the generation of micro-chipping wear.

The melting flow properties, compatibility, thermal and mechanical properties were characterized by melting index test, dynamic mechanical analysis (DMA), thermal analysis, tensile test and the fracture suface morphologies.
Results and discussion Mechanical and thermal properties.
Table 1 demonstrates the relationship between composition ratio and the thermal as well as mechanical properties.
Mechanical properties (tensile strength and flexural strength) from the Table 1 showed there were only very small changes between the blends with different PPS loading.
The blends possessed both excellent thermal stability properties and mechanical properties.

Figure 1 shows that the glass substrate heat-affected zones (HAZ) generated by laser light can be divided into two transient zones and one quasi-steady-state zone.
Considering Fig. 2, the general energy equation for an isotropic and homogenous material, with constant properties and negligible heat losses, is reduced to (2) where a= kc /ρ.
The thermal weight function is a universal function similar to Bueckner’s WF for mechanical loads.
This means that thermal loading is better able to induce crack growth than mechanical loading.
Bueckner, A Novel Principle for Computation of Stress Intensity Factors, Z.