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The hydrolytic properties of LiAlO2 (LAO) are important factors for its applications on LED fabrication.
Consider the production costs and electronic circuit design factors, most white LED have improved from the blue LED.
This paper shows the hydrolytic properties of LAO and polishing operating conditions.
Summary This paper investigated the hydrolyzable material properties of LiAlO2 by experiments.
The properties data of hydrolysis reaction increases the understanding of the material properties of LiAlO2, which will be applied to studies of further hydrolysis researches.

Factors Affecting Performance of Dual Fuel Compression Ignition Engines Mohamed Mustafa Ali 1, a, Sabir Mohamed Salih 2, b 1Mechanical Engineering Dep., Faculty of Engineering, Sudan University of Science and Technology, Khartoum, Sudan 2Mechanical Engineering Dep., Faculty of Engineering, Sudan University of Science and Technology, Khartoum, Sudan amustafam@zahid.com, bsabirmohamed@sustech.edu Keywords: Dual fuel combustion, thermal efficiency, exhaust emissions, mixture strength, injection timing Abstract.
In all cases this will require different ignition delay than that of diesel fuel and change the combustion pressure and temperature as well as end gas properties.
Another control factor affecting the performance is the diesel start of injection timing.
Conclusion From these results, the factors affecting performance of dual fuel operation of diesel engines can be stated as follows: 1- Mixture strength of the added gasoline fuel should be optimized.
Acknowledgment The authors would like to acknowledge the support of Sudan University of Science and Technology (SUST), department of mechanical engineering for facilitating this research.

Low climatic temperatures, frequent transitions through zero degrees in the autumn-spring seasons, and other aggressive factors have a significant impact on the mechanical and operational properties of structural materials.
Frequent transitions through 0 degrees during the day in autumn and spring periods, increased solar radiation due to atmospheric transparency, high humidity in Arctic climate zones, have a negative impact on the physical and mechanical properties of structural materials.
Test Materials and Experiment Methodology Amokor is a series of liquid polymeric materials that allows you to return the original physical and mechanical properties and even improve them in structural materials, such as concrete, metal, brick, wood, etc.
To study the effect of low temperatures and other climatic factors of Central Yakutia on the mechanical properties of heavy concrete and the possibility of increasing these properties, the Amokor KM polymer material was used to modify samples.
The study of the properties of materials at temperatures of -50 - -70 ° C is not reflected in the literature.

Such factors as material parameters, winding angle and dimension affecting the mechanical properties of the rigidized tube are taken into account individually by fixing the other factors.
As shown in Fig.5, three curves of the mechanical properties have the same trend.
Furthermore, there is a notable change in the mechanical properties for L/D less than 20, also in Fig.5.
When L/D is larger than 20, the mechanical properties decrease slightly.
It is found that the winding angle and the ratio of length to diameter affect the mechanical properties significantly.

Furthermore, the presence of water as a variable affecting the test was investigated.
The presence of water has been investigated as variable affecting the test.
The effect of water, has been considered as parameter affecting the test.
Pamplona, Ultrasonic evaluation of the physical and mechanical properties of granites, Ultrasonics. 48 (2008) 453–466
Aiello, Non-destructive techniques to assess mechanical and physical properties of soft calcarenitic stones, Procedia Chemistry..8C (2013) 35-44

Preparation and Performances of Geopolymer-Based Plant Fiber Composites Shiju Wei a, Jianli Tan b, Wanli Lu, Leping Liu, Shujuan Yu and Guangjian Zheng c,* College of Chemistry and Material Science, Guangxi Teachers Education University, Nanning, Guangxi 530001, P.R.China a1522079917@qq.com, b864755795@qq.com, c*zhgj0920@163.com Keywords: Geopolymer; Plant fiber; Composite; Mechanical properties; Orthogonal test Abstract.
The results show that sequence of influence factors for bending strength was: solid to liquid ratio > fiber content > water glass modulus.
The excellent physical and chemical properties of material were exhibited such as high bending strength, low shrinkage, impermeability, fire resistance and frost resistance.
Results from orthogonal test indicated that the sequence of affecting bending strength index is: solid to liquid ratio > fiber content > water glass modulus, and the optimum combination of factors is A3B3C3.
Synthesis and mechanical properties of novel composites of inorganic polymers (geopolymers) with unidirectional natural flax fibres (Phormium tenax).

Petersburg, 191014, Russia 1sharapova_dm@pers.spmi.ru; 2mikhail_sharapov@mail.ru; 3nischar@mail.ru Keywords: aluminum alloys, properties, mechanical engineering products, electron beam welding Abstract.
The paper also presents the results of mechanical properties testing, the corrosion resistance and the delayed fracture tests.
When the 1560M and 1980T1 alloys are welded together, an increase in hardness is observed in the HAZ from the 1980T1 alloy side, which is due to a significant difference in the physical and mechanical properties of the alloys being welded.
The results of comprehensive studies of mechanical properties, as well as the delayed fracture and corrosion resistance testing of welded joints have confirmed their high quality.
[7] Gorlanov E.S., Brichkin V.N., Polyakov А.А., Electrolytic production of aluminium: Review. part 1. conventional areas of development Tsvetnye Metally, 2, (2020) 36-41DOI: 10.17580/tsm.2020.02.04 [8] Kasyanov A.V., Belousov A.E., Popov G.G., Bolobov V.I., Determination of factors affecting on grooving corrosion Topical Issues of Rational Use of Natural Resource, 1, (2019), 393-399 DOI: 10.1201/9781003014577-49 [9] Alexandrov N.V., Blank E.D., Eroshkin S.B., Sharapov M.G., Electron beam welding of cold-resistant steels of large thicknesses, nodes of oil-producing platforms, Materials science issues 1 (97) (2019) 164-174 [10] Pryakhin E.

Through the equivalent analysis, the length and depth of corrugations are main factors affecting the equivalent elastic constants.
The orthotropic property of the plate derives from different structural properties along both orthogonal directions rather than different material properties.
There are different mechanical properties along directions that having different angles to corrugations.
Because of the corrugation effects, the corrugated plate has different mechanical properties along P and L directions, thus has different elastic constants along P and L directions.
There are different mechanism properties along directions with different angles to corrugations, which should be considered respectively Based on equivalent strain method, Eq. 2, Eq. 7 and Eq. 10 show that the length and depth of the corrugation are main factors to affect equivalent elastic constants.

This paper deals with the analysis of the structural and mechanical behavior properties of the core, adhesive and faces, for sandwich composite polymeric products.
However, faces will have their mechanical properties substantially altered by the polyester resin with hardener that is used for bonding them to the sandwich core.
Table 3: Technical date of SikaForce 7718 L30 Properties Comp.
Structural interdependence of the mechanical properties of cutting machinability A sandwich structure composite polymeric consists of several types of materials, each having different mechanical properties.
Conclusions Machinability of sandwich structure composite polymeric involves a close interdependence with the mechanical properties of the whole structure.

With a synthetic study on the mechanical properties and deformability of TWBs, and an advanced mechanical analysis of weld-line movement, the theoretic basis for the whole forming and redesign of a complicated component of auto body (body side-inner panel) was achieved.
Mechanical Analytic Model on Weld-line Movement.
To eliminate the defects, the following parameters are chosen to be optimized according to deformational properties.
Though local defects of wrinkles and deficient deformation still appear, they are in the complementary process area and can be cut out as waste in subsequent handling without affecting the product quality.
 Considering the structural and functional properties of the intended part, on the basis of functional test, four pairs of parent metal sheets are selected to meet the technologic and functional requirements