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Hydrogen degrades the mechanical properties of most structural metal materials, especially steel.
The mechanical properties were determined by the notch impact test.
Hydrogen has a negative effect on the mechanical properties of steels, and hydrogen embrittlement (HE) occurs.
The effect of saturation time on the mechanical properties of the material was monitored using a notch bend test.
Laureys, et al., Use of existing steel pipeline infrastructure for gaseous hydrogen storage and transport: A review of factors affecting hydrogen induced degradation.

Based on the results, addition of BG to CPC improved bioactivity properties of CPC material and did not affect its solubility adversely.
It has different properties such as biocompatibility, antimicrobial and anti-fungal properties, injection capability, suitable flooding, convenient clinical application and the formation of dentin bristles.
They require additives to improve the physical and mechanical properties, increase the biocompatibility properties, and induce better bone formation and the formation of a suitable dentin bridge in the direct pulp capping procedure [19].
Considering the above mentioned factors, it seems necessary to conduct further clinical studies to clarify the function of CPC/BG in the oral environment.
Hampshire, Mechanical Properties, Structure, Bioactivity and Cytotoxicity of Bioactive Na-Ca-Si-PO-(N) Glasses, J Mech Behav Biomed Mater 86(2018)284-293 .

They performed cyclic pressure load tests of 400µm~500µm pre-cracks in silicon nitride balls and found that the pre-crack length strongly affected the fatigue strength.
Table 1 shows its mechanical properties [6].
Table 1 Mechanical properties of the Si3N4 specimens [6].
The initial values of the maximum stress intensity factors KImax were plotted on the vertical axis.
It was found that the pre-crack length strongly affects the fatigue strength of silicon nitride balls.

This paper primarily focuses on analytical descaling concepts for both mechanical and thermal outputs for flat jet nozzle and process factors.
It can be observed that geometrically the standoff decreases at left of nozzle (assuming positive offset and rake) and increases at right end side from nozzle orifice centre (or COG of imprint) with ever increasing rake and offset (or twist) angle affecting also the spray width.
Properties of scale are extracted from author [4] and [14].
Future applications of the models will include optimisation of descaling strategy and throughput for a range of products together with intrinsic coupling of descaling process parameters with scale removal based on oxide scale properties inc. interface.
[5] P.H Bolt, Understanding the properties of Oxide Scales on Hot Rolled Steel Strip, Steel Research International, 75 (6) (2004)

Simulation of Cracks in Fiber Reinforced Composite Plate Pramod Kumar1a, Ashish Kakyal 2 1 Department of Mechanical Engineering Dr B R Ambedkar National Institute of Technology, Jalandhar, India 2 Department of Mechanical Engineering Dr B R Ambedkar National Institute of Technology, Jalandhar, India 1a kushwahapramod@nitj.ac.in Keywords: Glass fiber composite; Strain energy release rate; Cracks; stress intensity factor Abstract.
Micro mechanical approach is used for modelling the crack in composite materials.
Material properties chosen for a glass fiber reinforced epoxy composite given in Table 2[8].
Table 2 Basic properties of GFRE constituents Properties E-Glass fiber Epoxy E(GPa) 72.4 2.76 G(Gpa) 30.2 1.02 υ 0.2 0.35 Loss factor 0.0018 0.015 Fig. 2 Von misses stress contour of composite Fig. 3 Deformation of composite RVE.
(iv) The matrix crack affects the damping of the glass fiber epoxy composite.

Higher amounts don´t bring about higher tinting strength and in the case of more than 10 % its mechanical properties can be negatively affected.
In case of using more 10 % of pigment the mechanical properties of concrete deteriorate.
Lightness, hue and saturation are represented by the three factors L*, h* and C* respectively.
It will be necessary to perform number of laboratory tests to evaluate sufficient durability properties of those modified composites.
Influence of iron oxide pigments on the properties of concrete interlocking blocks, Cem Concr Res 2003, Vol. 33, pp. 1889–1896

The local plastic deformation was considered to imitate the mechanical damage on the pipe.
The mechanical damages can affect the safety of pipelines, and even depress their service life; may lead to enormous economic costs and jeopardize the surrounding ecological environments.
PRCI proposed an empirical Q factor model to assess the residual strength of pipelines with a groove plus dent defect; while British Gas established a fracture assessment model to deal with the same problem [7].
Physical model to estimate the fatigue life of notched specimen [17] According to the local plastic deformation on the pipe which was caused by the mechanical damage, the residual stress was generated and the material properties was changed, which must be considered in the study of fatigue initiation life.
On the other hand, the changes of material properties must be considered in the study of fatigue propagation life and the effects of the residual stress were decreased because of the release of stress while the crack initiation.

The factors effecting the micro-hardness of the work-piece has been obtained.
Zhang et al. [3] investigated the effect of the EDM pulse current on the micro structure and the properties of the P20 specimen surface.
The micro hardness is reduced from the outer layer to the base metal after the heat treatment, indicating that the mechanical properties are changing of the machining surface.
The measurement of the micro hardness beneath the machined surface of AISI H13 was carried out using Vickers micro hardness tester to characterize its mechanical properties.
Hardness is unaffected by the input factors Fp and Tup.

In FSW process three zones develop [2]: Heat Affected Zone (HAZ), Thermomechanically Affected Zone (TMAZ) and Weld Nugget Zone (WNZ).
The geometry, the thermocouples position, the material properties are presented in Fig. 5 and Table 1.
AA2014-T6 material properties [2].
Material Properties AA2014 -T6 HS Steel Tool Thermal conductivity, K (W/mK) 155 20 Yield stress at room temperature, (MPa) 400 - Yield stress at FSW temperature, (MPa) 12 - Onset melting temperature, Tm (ºC) 507 - (a) (b) Figure 6.
Effect of rotational speed (a), translational speed (b) and stick factor (c) on the temperature distribution.

The inks’ particle size and distribution are tested before it is coated onto the surface of covering property test paper.
Factors like pigment dispersion greatly influence the CP, that makes it of great importance to study on the relations between dispersivity and CP of inks.
Pre-disperse them for 30min in D2004W electric mixer, then grind 0.5h, 1.0h, 1.5h, 2h in IGT-2S high speed mechanical stirrer respectively.
The higher the density value is, the poorer the covering property is, conversely, the better.
China Printing and Packaging Research. 2011(3):1-8 [5] FENG Wenzhao: Several factors affect the whiteness of the ink [J].