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Large deformation and produce twins, lead to grain refinement and had strongly influence on mechanical property of ZK80 Mg alloy, as well as strong affected the mechanical properties of the alloy.
It’s very important to improve the microstructure and performance of magnesium alloy via plastic processing technology which can control or improve the microstructure and mechanical properties of magnesium alloys [6].
It can be seen from Fig. 4 that the mechanical properties of As-cast ZK80 Mg alloy by extrusion-die forged compound forming, and its tensile strength, yield strength, elongation increased 41.1%, 22.4%, 47% respectively。
Fig.4 Evolution on the mechanical properties of ZK80 magnesium alloy Evolution on fracture mechanism alloys.
(2) As-cast ZK80 Mg alloy via close-die pressing of extruded preformed was subjected to two three-stress, and its mechanical properties at room temperature has been significantly improved

Results showed that the microstructural features such as phases, carbides, i.e. morphology and type, sub-grains and their boundaries and misorientation angles are the dominant factors influencing the mechanical properties.
In addition, ageing led to the reduction in the mechanical properties and hardness when compared to the as-produced condition.
In order to understand the carbide types affecting the materials properties EDS was conducted on the studied materials.
Room temperature mechanical properties.
Influence of aging time on a) hardness and b) mechanical properties.

Stability of mechanical properties is observed in temperature range from -40°C to 300°C [1, 2].
Moreover, duplex steels are much cheaper than high-nickel austenitic steels and this is caused, among other factors, by decreasing the nickel content as alloying element [2, 3].
Tested steel had the following mechanical properties: Rm = 923 MPa, R0.2 = 724 MPa, R1.0= 800 MPa, A5 = 34%.
Chemical composition of X2CrNiMoCuWN25-7-4 steel [mass %] C Mn Si P S Ni Cr Mo Cu W N 0.016 0.69 0.48 0.023 0.0005 6.95 25.55 3.66 0.66 0.58 0.24 Tests results Mechanical properties of welded joints.
Such ferrite content enables the achievement of proper structure and, as a consequence, the proper mechanical properties and resistance to corrosion.

Investigating Time Dependent Mechanical Properties of Epoxy with Nano Particles by Using Indentation Tests Guo-Wei Ruan, Ming-Chen Chuang, Hsing-Han Yen, Chin-Tu Lu and Nai-Shang Lioua Department of Mechanical Engineering, Southern Taiwan University No. 1, Nan-Tai Street, Yungkang Dist., Tainan City 710, Taiwan R.O.C anliou@mail.stut.edu.tw Keywords: Constitutive equation, viscoelastic, epoxy Abstract.
The objective of this study was to examine the time dependent mechanical properties of epoxy without/with nano particles composites and how the nano particles in the epoxy affect the relaxation properties of epoxy.
The ramp-hold indentation tests were used to investigate the time dependent mechanical properties of epoxy with and without Al2O3 nano particles.
In order to perform high fidelity finite element simulation to identify the fracture properties of embedded biological specimens, the proper time dependent mechanical properties of matrix material should be used in the FE analyses.
The objective of this study was to examine the time dependent mechanical properties of cold mounting epoxy with Al2O3 nano particles under indentation tests and to identify material parameters for the easy-to-use constitutive equation which can describe the time dependent mechanical response of aforementioned epoxy for finite element analyses.

The Main factors affecting the stability of underground caverns are selected, including the rock mechanical parameters (elastic modulus, Poisson ratio, cohesion and internal friction angle) and initial ground stress parameter (lateral pressure coefficient).
Introduction The in-situ measurement displacement of underground cavern is a comprehensive information value including all kinds of engineering factors, and is also an important index indicating project’s stability.
Moreover rock’s stability of underground cavern is affected at different levels by multiple factors including initial stress field, physical and mechanical parameters of rockmass, construction and supporting methods, and underground water, etc[1].
Among these parameters, initial stress field and physical and mechanical parameters of rockmass are key and internal factors influencing rock’s stability of underground engineering, and even for the same engineering these parameters are variational, so some scholars have observed that researching the influence degree and influence law on rock’s stability of initial stress field and physical and mechanical parameters, that is, sensitivity analysis of mechanical parameters to rock’s stability is very important to determine reasonable design and construction methods and various methods are adopted to study it[2-5].
So, based on large finite element analysis software FINAL of geotechnical engineering, designing testing program of sensitivity from a more overall view, this paper uses convergence displacement as the index of judging rock’s stability, and adopts numerical test method to carry out the sensitivity analysis of parameters concerning initial stress field and rockmass mechanical properties to displacement of rock.

The purpose of this study is to increase knowledge in the mechanical properties of parts made of wood-plastic composite materials by using 3D printing.
Relative to weight –mechanical properties and the effect of the amount of fill on the properties are also determined.
The mechanical properties of 3D-printed specimens using FDM depend on various factors in addition to the properties of the printing media.
Pregger, Effect of layer orientation on mechanical properties of rapid prototyped samples, Mater.
Sweeney (Eds.), Mechanical Properties of Solid Polymers, 3rd ed., John Wiley & Sons, Ltd, West Sussex, United Kingdom, 2012, pp. 227-259

The special composition of UHPC bring its unique physical and chemical properties, which are closely related to the density of the structure, thereby affecting the chloride ion diffusion and the corrosion of steel fiber.
The bond strength between the steel fiber and the matrix is a key factor affecting the tensile and deformation resistance of UHPC.
Corrosion will inevitably affect the mechanical properties of the steel fiber and the bond strength with the matrix, which will further expand to the whole performance of UHPC [48].
Qian, et al, Effect of nano-TiO2 on the mechanical properties of cement mortar, Constr.
Liu, et al, Mechanical properties of hybrid steel fiber reinforced high strength concrete, J.

Investigation of Physical and Mechanical Properties of Construction Materials of Forced Carbonate Hardening N.V.
Physical and mechanical properties of building materials based on calcareous-lime compositions of semi-dry pressing, hardening according to the principle of forced carbonization, depending on the prescription and technological factors of their production have been studied.
Introduction The physical and mechanical properties of materials are their most important characteristics, which are used in the calculation of building structures made of these materials and products.
A significant place in the physical and mechanical characteristics of the material is given to deformative properties, which include their own deformations and deformations under the action of an external load.
Wu, Studies on some factors affecting CO2 curing of lightweight concrete products, Resour.

The thermal conductivity of a material is determined by three factors: first, the grain size and dislocation density of the material, second, the thermal expansion mismatch and wetting properties of the matrix and filler materials, and third, defects such as holes and holes generated during sintering.
Mechanical Properties While mechanical properties are not practical targets for composites with high thermal conductivity, they are still important because the state of the interface between the filler and matrix determines both the composite's thermal and mechanical properties (thermal resistance of the interphase boundary) and in the manufacture and operation of composite products for thermal applications, mechanical properties are critical. 3.2.1.
Mechanical and thermal properties of various composites.
No Specimen Mechanical Properties Thermal properties Ref.
· Wear resistance of CMCs increase as the proportion of reinforcement increases, and is affected by sliding velocity, weight applied, and sliding distance, among other factors.

This research was study the effect of resistance spot welding (RSW) parameter on mechanical properties and macro structure.
Factors affecting the optimum were welding current of 14,500 amp. , welding time of 60 cycle and electrode force of 1.2 kN.
Optimization with Factorial Design When studying the effects of the factors that affect the response factors.
The result found that in each of the factors affecting the all response factors.
Factors affecting the tensile shear and nugget size are the optimum welding current 14,500 amp, welding time 60 cycles and electrode force 1.2 kN. were tensile shear 1.30 kN. and nugget size optimum 4.58 mm.