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This paper presents a summary of research achievements on fire-resistance behavior of HPC in the past 10 years including the mechanical behavior degradation, analysis of spalling mechanism, effect of various types of fiber and other factors influencing the post-fire properties of HPC material as well as structural behavior of HPC elements.
Microstructure of HPC under elevated temperatures Physical and chemical reaction The evolution of microstructure of HPC can surely affect the mechanical properties of the structure when heated [13].
Sullivan [45] examined how the explosive spalling was affected by several factors in order to obtain a clear understanding of the deterioration of HPC beam in flexure during fire exposure.
The deterioration of mechanical properties of the entire HPC frame structure is found to be not as serious as that of the materials.
Mechanical properties of high-strength concrete after fire, Cement and concrete research. 34 (2004) 1001-1005

This paper presents a study on the machining quality of prototype model, and points out its important influencing factors including shaping room temperature, shrinkage ratio of material and wet condition of support material and so on.
The Key Influence Factors on Quality of FDM Prototype Model Shaping Room Temperature.
The nozzle temperature determines adhesive and packing properties, the width and flow of extruding fuse in FDM.
The writer analyzes the key factors influencing the quality of FDM prototype and provides some practical solutions for the problems that may occur during operation.
Hong: Mechanical Science and Technology for Aerospace Engineering Vol. 26(2007), p. 1652-1656, 1660

Numerous factors influencing the surface quality of wood after machining, among them we highlight the machining parameters and the properties of the wood.
Machining parameters and the properties of this material are the variables that stand out.
Fig. 3: Main effects of factors on averages of roughness average (Ra).
Fig. 4: Main effects of factors on averages for the noise emission.
Thoemen, Effects of formulation variables on surface properties of wood plastic composites, Composites Part B: Engineering. 43 (2012) 325-331

This is due to the fact that changes in the concentrations of alloying elements within the grade composition strongly affect their properties [4-6].
This leads to instability of the structure, basic mechanical properties and wear resistance, which affects the service life of castings that can differ by 2- 3 times for the same operating conditions of pumps [7-10].
The microhardness and the volume fraction of carbides affect the properties most strongly.
Niobium and boron also affect the properties of cast iron.
Potapov, The relationship of the chemical composition, mechanical properties and wear resistance of high-chromium cast irons, in: V.

The aim of this work was to investigate the contribution of the factors governing the deformation and transformation process of conditioned austenite.
Microstructural characteristics of the retained austenite such as morphology, grain size, carbon enrichment, and also the presence of bainite volume fraction can considerably affect retained austenite transformation kinetics, work-hardening rate and thus the final mechanical properties [4, 5].
On the other hand, in multiphase structure, achievement of mechanical properties does not depend just on the retained austenite fraction.
It is obvious from the stress-strain curves (Fig. 5) that the samples D, E, F have different mechanical properties, despite rather similar content of present phase constituents, particularly the retained austenite).
It is well known that mechanical properties of TRIP steels strongly depend on the microstructural composition.

properties Abstract.
At first, we studied Ti6Al4V samples produced by Electron Beam Melting (EBM) to determine the mechanical properties of the base material.
Similar results were obtained by Al-Bermani and colleagues [9] who also correlated the reduction of the mechanical properties of the treated samples with the size increase of the α phase lamellae.
Conclusions In this work the mechanical properties, microstructure, and defects of a Ti6Al4V alloy 3D printed by EBM were determined.
The mechanical properties of 3D printed samples are comparable to the ones of the same alloy produced conventionally and treated with a solution and ageing treatment.

Several works in literature focused on the correlation between mechanical properties and material hardness.
The sample is partitioned in four zones characterized by different mechanical properties, namely the nugget zone, the thermo-mechanically affected zone, the heat affected zone, and the unaltered base material.
Vice versa, the properties in the thermo-mechanically affected zone and in the heat affected zone are linearly variable with the distance from the welding centerline.
Improvement of the mechanical properties of reinforced aluminum foam samples.
Dissimilar friction stir lap welding of AA2198 and AA7075 sheets: forces, microstructure and mechanical properties.

Effect of Second Phase on Mechanical Properties of Bainite-base Steels Hakcheol Lee 1,a, Xiaodan Wu 2,b, Young Min Kim 3,c and Nack J.
Effects of acicular ferrite and retained austenite on the mechanical properties of bainite-base steels were investigated.
Tensile properties.
Tensile properties of all steels are presented in Table 4.
There are several factors which affect the stability of retained austenite such as its solute content, size, distribution, etc. [9, 12, 13].

Introduction High-strength low-alloy steel (HSLA) is a type of alloy steel that provide better mechanical properties and/or greater resistance to atmospheric corrosion than conventional carbon steel.
These types of steel vary from other steels in that they are made to meet specific mechanical properties rather than a specific chemical composition.
The tensile and impact properties of HSLA steels are affected by many factors, such as the element composition, element content, microstructure, manufacturing process, test method, experimental temperature and so on [3~5].
Among which, the experimental temperature is a very significant factor, because that the steels represent various property changes at different temperature.
Fig.1 The mechanical properties of the specimens tested at different temperature (a) Yield strength and tensile strength, (b) Elongation and reduction of area From Fig.1a, it can be observed that the yield strength of the specimens tested among the temperature range of 300°C and 400°Cwere higher than that tested at room temperature.

To improve electrical automation control equipment’s reliability, the job should be promoted to a strategic height so as to assume and effectively control the factors affecting the reliability of the equipment, thus ensure the accuracy of reliability test.
Analysis of Factors Affecting the Reliability of Electrical Automation Control Equipment From the reality, the current electrical automation control equipment in our country has low reliability, which causes great obstacle for China's economic construction.
And summarize these factors.
Certain environmental factors such as electromagnetic waves, mechanical conditions and the climate cause a certain degree of influence on the reliability of electrical automation control equipment test.
In addition, in the using process of machinery, due to mechanical factors of the process, mechanical condition may have electrical parameters which can change electrical automation control equipment’s, and even cannot run the normal operation of electrical automation control equipment.