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Fine dendritic microstructures in castings, characterized by the dendrite arm spacing are recognized to yield superior mechanical properties if compared with coarser ones.
Much research has been devoted to the definition of the factors affecting the fineness of the dendrictic strucuture.
They identified as the main factors limiting the theoretical predictions of λ2 in complex alloy systems, the precipitation of intermetallics which masks the effects of further coarsening and the assumption of linear trends of liquid concentration with time.
Hence, in columnar dendritic mushy zones (which is the case of all castings examined in the present study), the interdendritic permeability is affected by the dimension of the interdendritic channel, characterized by λ1 and by the tortuosity of this channel affected by λ2.
These solidification thermal variables were shown to affect significantly the formation of dendrite spacings during transient directional solidification, which strongly affected the development of porosity.

Thermal Deformation in a Dry Gas Seal Weibing Zhu1, a, Chengzhong Deng1,b and Heshun Wang1,c 1School of Mechanical Engineering and Automation, Xihua University, Chengdu, Sichuan, 610039, P.
The behaviour and performance of a dry gas seal are infuenced as much by the thermal behaviour of the seal as by any other factor.
Because the structures of the seal rings and boundary conditions have axial symmetry property, so the problem can be simplified as a problem of axial symmetry stable thermal conduction, its heat conduction equation [5]
Coefficient of Thermal Convection The mainly factors affecting thermal convection include fluid dynamics, geometrical shape of sealing ring, flow state of fluid and physical property of fluid.
Gu: The Mechanical Seals Technique (Machinery Industry Publishing House, Beijing2005) ,in Chinese

Among many of factors involved, the main certain factor is the most allowable interference and the minimum compute interference, the former is decided by promising strength condition of fit part material ,the later is decided by promising strength condition of linking, that is decided by delivering a burden condition.
Then each factor’s influence is considered, through necessity revise then the most interference and minimum compute interference is get.
The finite element analysis model for interference fit combination mold extrusion is established, and the cell types and material properties are determined, the combination mold interference fit problem is designed, analyzed and calculated by using ANSYS finite element software [5].
So it will not produce plastic deformation and not affect the product performance.
[3] Xing Jingzhong, Wang Ronggang, Chen Xiaoxia, et al: ANSYS7.0 Of Examples and Practical Application (Mechanical Industry Press, Beijing 2004) [4] Gong Shuguang: Application ANSYS Engineering Analysis (Mechanical Industry Press, Beijing 2003)

To learn about banana microstructure changes on affecting moisture dehydration performance and its quality during oven drying process, this experiment chose scanning electron microscopy to observe the microstructure changes on outer surface, inner surface and cross section of banana peel and its flesh during drying process, in order to examine the relationship between dehydration performance and its microstructure shape and microstructure pore structures changes.
Introduction Drying is a process with material moisture evaporating by thermal action, this process is often associated with material physical and chemical properties changes[1].
Banana (Musa paradisiaca ) drying process can reduce mechanical damage for fresh fruit, easy for storage and transportation.
Some researchers studied on dehydration performance and quality changes during banana drying process on temperatures, they found banana flesh microstructure changed obviously during drying, all these researches mainly focus on fruit dry product microstructure contrast [6-7], while pay less attention to microstructure changes affecting moisture evaporating resistance or drying quality relationship research[8-9], so still needs to be further study.
This was mainly factor that lead to peel and flesh moisture dehydration performance and quality decreased on drying.

Change of stress field and displacement field will affect normal service of the tunnel.
The Nanjing Yangtze river tunnels are constructed by shield method and the shield tunnels are assembled by pressing connection with precast segment, which cross section is in circle shape with good load-carrying properties.
Mechanical parameters of material are shown in Table 2.
Table 1 Mechanical Parameters of Soil Material No.
A Discussion of the Factors Effecting on Longitudinal Deformation of Subway Tunnel [J].

In the process of 3D printing, the alloy undergoes significant phase transformations, which have an important effect on the mechanical properties of the final products [4], and naturally affects, among other things, the machinability.
Moreover the latter, as a rule, is the fundamental determining factor in the analysis of mechanical characteristics.
Changing the properties of the material could not but affect the characteristics of its machinability, and the features of milling titanium alloy obtained by the electron beam melting method revealed.
[3] M.Simonelli, Y.Y.Tse,C.Tuck, Effect of the build orientation on the mechanical properties and fracture modes of SLM Ti-6Al-4V, Materials Science & Engineering A 616 (2014) 1-11
[4] A.Popovich, V.Sufliarov, E.Borisov, I.Polozov, Microstructure and Mechanical Properties of Ti-6AL-4V Manufactured by SLM, Key Engineering Materials 651-653 (2015) 677-682

Due to the mutual effects of electrical and magnetic and mechanical process in EMR, the theory study of EMR is difficult [3-5].
Based on this, the true stress-strain curves of 2A16 at different strain rates and temperatures were obtained by experimental method, the constitutive model of 2A16 was determined and the dynamic deformation properties were investigated.
The temperature barely affects material flow stress and strain rate strengthening effect is dominant.
Therefore, the 2A16 is affected by strain rate strengthening effect and temperature softening effect under dynamic condition.
In order to convenience, the parameter is only modified with single factor and took as a function of the strain rate, that is .

Meanwhile, as the high-energy laser beam drills through the rock sample, the skin burn points on rock surfaces occur in varying degrees, which definitely will change the physical properties of original rocks.
It is known that the heat affected zone around laser spots mainly focuses on the partial regions of the rock, and this zone is very small comparative with the size of the whole rock.
Assuming the factor,, present the dimensionless rate of solid substance in solid-liquid zone.
Similar to the solid-liquid zone, it is assumed that the factor,, present the dimensionless rate of gas substance in liquid-gas zone.
To simplify the work of the mathematical calculation, it is assumed that the thermal physical parameters of rock materials in every phase transition are only related to the temperature while other variables such as the pressure and the surrounding factors have nothing to do with it.

It has been known for decades that AlN inclusions can have adverse effects on the properties of steels [8].
Table 1 presents a summary of mechanical properties obtained on rolled TMR-DQP steels.
Tensile test and impact test properties obtained with DQP steels.
Kömi, Microstructural Characterization and Mechanical Properties of Direct Quenched and Partitioned High-Aluminum and High-Silicon Steels, Metals (Basel). 9 (2019) 256
Misra, Microstructures and Mechanical Properties of Tough Ductile Ultrahigh-Strength Steels Processed through Direct Quenching and Partitioning, Materials Science Forum. 941 (2018) 468–473

The agricultural development of mountainous hilly country is seriously affected.
As the soil has a multi-phase, loose dispersion characteristics and properties, using a continuous physical theory and its numerical solution (finite element method or boundary element method) is difficult to describe the anti-rotation grubbing harden soil process [6].
Orthogonal Design of Chisel-Cutting Parts Factors Level 1 2 3 structure soil cutting angle(o) A 60 65 70 the effective clearance angle (o) B 3 6 10 Blade shape C I II III Orthogonal Experiments of Structural Parameters of Cutting Part.
Based on preliminary analysis, listing the tip structure of factors and levels, see Table II.
Orthogonal array to study the impact factors of each level, pairs of orthogonal experimental results corresponding to the processing and analysis, specifically in table V.