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Fig.1 Three kinds of heat treatment processes (OQ=oil quench; ① PFT；②BFT；③AMT) Analysis of mechanical properties and microstructures for tested samples.
Considering the above factors, AMT steel could form more RA and in the same IBT holding time.
External conditions like testing temperature and strain rates were also affecting its stability.
Among all these factors the most important factor however was the carbon concentration of austenite [14~16].
Mechanical properties.

Heat treatment is an effective way to improve the mechanical properties of casting Al-Si alloy, solution treatment and aging have important implications to improve the microstructure and properties of the alloy, after solution treatment and aging the performance of the alloy can be greatly improved[7].
The elongated needle-like eutectic Si, since the presence of sharp corners, will caused stress concentration in the force, and produced fragmentation effect on matrix, which will reduced the tensile properties and hardness of the specimen, so it’s necessary to improve the microstructure by heat treatment, thereby enhanced the mechanical properties of samples.
Cu had a solid solution strengthening effect in the aluminum alloy, Mg was in the form of Mg2Si in the aluminum alloy, and it can improved the hardness and tensile strength, to further improved the mechanical properties of samples.
Based on the above analysis, in order to select the suitable heat treatment process, chose the tensile properties as one of the evaluation criteria.
Effect of heat treatment to microstructure and properties of hypereutectic Al-Si alloy[J].

During the production of domestic automobile vent pipe, because the crystal grains of welding Joint heat-affected zone are not refined by heat treatment and become very big, forming properties of cold machining of ferrite stainless steel become bad.
At the same time, the affecting factors are considered, such as thermal radiation, phase change latent heat, thermophysical properties of materials with temperature changes and the spread of convective heat in the liquid metal in the model.
The research results has important meaning to know accurately laser welding thermal process, welding stress , distortion predictive control, the structure property analysis and the automobile exhaust pipe cold forming quality[4].
(3) The dynamic temperature field establishment of 409L ferritic stainless steel laser welding pipe laid the foundation for forecasting mechanical properties of welded joint and stress-strain field.

, Additive Manufacturing, Mechanical Properties.
These factors also play a crucial role in defining the final weight of the lattice structure.
Finally, mechanical properties needs to be considered in the final component.
Surface integrity, mechanical properties behavior and dimensional deviation needs to be ensured.
On the one hand, surface integrity and mechanical properties depends on the adequate performance of the process definition.

The main factor that touch on interphase, water absorption, chemical treatment and fiber fraction which mean affect the performance of kenaf fiber as a reinforcement are discussed.
The research of natural fiber reinforced composites is growing rapidly due to their mechanical properties, low cost, processing advantages and low density.
Fiber fraction: A more previous study of the fiber content on mechanical properties of kenaf fiber reinforced composite was carried out by Nishino [14].
According to some literature [18, 19], woven fibre is have good mechanical properties compare to non-woven.
Effects of Injection Temperature on Mechanical Properties of Bagases/PP InjectionMolding Components, BioResources, (2010) Vol. 5, pp. 2097-2111

In this paper, the thermal conductivity of experimental system is carried on the theoretical analysis, then the distribution regularities of sectional temperature are obtained through the testing its of CFST under variable temperature effect, and the larger temperature difference will produce the temperature stress, which affects the bonding performance of structural interface.
So in order to better analyze the influence which is impacted on the mechanical performances of structure by the combination effect of multiple factors such as temperature and load, such paper can provide the theoretical and experimental foundation.
However, the thermal performance parameters between steel tube and concrete are different, when the structure is affected by the changes of outside temperature, there is an uncoordinated deformation between steel tube and concrete, then, the interface is easy to produce the debonding defect when the temperature arises, and the restriction which is impacted on concrete by steel tube has the increasing tendency when the temperature decreases, and the combination effect of the restriction, shrinkage and creep of concrete, load, etc. can lead the steel tube of structure to burst, so the above two kinds of cases all affect the mechanical properties and service life of structure.
Then, the larger temperature stress will change the chemical binder load of contact surface between steel tube and concrete when the specimen is in static load; and the combined effect of temperature stress and load stress will influence the restriction of CFST when the specimen is in dynamic load, which affects the mechanical performance of structure.
the bonding performance of CFST interface, therefore, such test analysis can guide the multi-factor coupling test such as temperature and load, and can provide the theoretical and experimental foundation for the coupling test.

The factors and levels are indicated in Table1.
Molded boards were dried, sawed and tested for mechanical properties after natural curing for fortnight.
There was also a great deal of bubbles in the boards affecting the solidify of cement, the structure of mat and the degree of binding between bamboo particle and cement.
The mechanical properties were improved as the temperature rised within a certain range.
(2) The influence of the addition content of NaHCO3 was obvious on physical and mechanical properties.

The Mechanical Properties of Concrete Incorporating Steel Slag as Supplementary Cementitious Material LI Xiaofeng1,a, DOH Shu Ing1,b*, FENG Weiying2,c, ALBTOOSH Ja’far A.
This study aims to evaluate the effectiveness of SS as supplementary cementitious material (SCM) partially replacing cement on workability and mechanical properties of fresh and hardened concrete.
Kumar et al. [5] studied the effect of SS powder on the mechanical properties of self-compacting concrete with recycled coarse aggregate.
The factors which affect the strength of the concrete may affect the UPV of the concretes where the concrete is controlled by the strength of the cement paste and the UPV is controlled by the properties of the aggregates used [26].
Rubio-Cintas, Slag substitution as a cementing material in concrete: Mechanical, physical and environmental properties, Materials. 12 (2019) 2845

The wet process uses natural bonding properties of wood and its lignin fibers.
This material significantly reduces impact noise even in very low thickness, what is positively reflected in the properties of whole structure.
Properties of Sound Insulation Pads.
In the field of impact sound transmission loss there is dynamic stiffness one of the main variables affecting sound insulation properties of ceiling with floating floors.
Static Relaxing Properties.

The analysis aims to identify the mechanisms responsible for service failure of an API 5L grade A pipe after about two years and, also, to mitigate further damage phenomena by a proper identification of the contribution of mechanical, metallurgical and environmental factors (focusing both on technological fluids characteristics and inhibition scheme).
Secondary corrosion damage phenomena As result of heavy dimensional alteration of wall thickness and environmental sudden changes (pH variation to alkaline domain and amine compounds presence on bare metal surfaces affected by erosion) there were created premises for the occurrence of secondary corrosion phenomena: as result of combined action of environmental and mechanical factors - fig. 7.
Figure 7 Figure 6 Discussions The above mentioned data analysis showed that responsible phenomena for in-service failure of pipeline are due to synergic action of hydrodynamic factors, environmental and mechanical factors.
Also, could be mentioned as responsible certain geometric factors (design) for the analysed sample /1/.
Mechanical factors are prevalent (erosion), but there is an important contribution of the environmental factors that concur to pipeline failure.