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Preface The volume contains selected peer-reviewed papers presented at the AMS-II 2021 Workshop “Advances in Materials Sciences-2021,” which took place in the framework of the II International Conference on Advances in Materials Science and Technologies - CAMSTech-II 2021 on 29-31 July 2021 in Krasnoyarsk, Russian Federation.
The presented papers cover recent research results in functional materials, polymer and composite materials, chemical production technologies, metallurgy, metal science, heat treatment and processing of metals and alloys, corrosion protection, surface engineering, functional coatings, some aspects of non-destructive testing, and technological measurements.
The volume will be helpful for a wide range of scientists and specialists of research institutes, design organizations, industrial enterprises, and educational institutions interested in materials science and technologies of materials synthesis and processing.
We provided all contributors with the opportunity to publish their papers in an international, peer-reviewed journal.
DUSTOV Editor-in-chief of the journal "Development of Science and Technology", Doctor of Chemistry, Professor of the Department of Oil and Gas Engineering, Bukhara Engineering Technological Institute Bukhara, Uzbekistan Ismoil B.

Stability Analysis of Dump Slope Based on FEM Strength Reduction Method Chao PENG1,a, Dong JI 1, Liang ZHAO1, Zhenyu QIAN2, Fenhua REN1,b 1School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China 2National Center for Materials Service Safely, University of Science and Technology Beijing, Beijing 100083, China apcisatc@163.com, brenfh2001@sina.com Keywords: Slope stability; Safety factor; Finite element strength reduction; Iterative calculation Abstract.
The material properties are shown in Table 1.
Mining Science Metallurgical, Industry Press, Beijing, 2006
Rock Mechanics and Engineering, Science Press, Beijing, 2002
Modeling and finite element analysis of the nonstationary action on a multi-layer poroelastic seam with nonlinear geomechanical properties, Journal of Mining Science, 45(4) 2009, pp 324-333

Materials and methods Materials.
In: Journal of Agricultural and Food Chemistry, Vol. 44(1996), p. 2591 [2] López-Nicolás, J.
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In: Journal of Colloid Interf.

In the following article we show a series of experiments carried out within the Laboratory of Stregth of Materials at the IUAV University of Venice in collaboration with the Department of Molecular Sciences and Nanosystems of the Cà Foscari University.
Polymer materials and their composites deform, or flow, over time when a constant load is applied.
Key Engineering Materials Volume 747 (2017) pp. 77-84
(Nova Science Publishers); (2012)
Creep and Relaxation of Nonlinear Viscoelastic Materials. 

Firstly, ABS filament materials were chopped into 1mm – 5mm pallet size.
Four(4) types of ABS materials was used in MFR.
Bohn, FDM Systems and local adaptive slicing, J.of Materials and Design, 20, 1999, 77-82
Song, Development of new metal/polymer materials for Rapid Tooling using Fused Deposition Modeling, J.of Materials and Design, 25, 2004, 587-594
Ibrahim, Mechanical Properties of Highly Filled Iron-ABS Composites in Injection Molding for FDM wire Filament, Materials Science Forum Vols. 773-774 (2014) pp 456-461

Fiber-reinforced composites are materials which exhibit a significant improvement in properties like ductility in comparison to the monolithic SiC ceramic.
Rawlings: Composite Materials: Engineering and Science CRC Press, (2000), p. 53-55
Withers: Journal of Nuclear Materials Vol. 283-287 (2000), p. 570
Briddon: Microelectronics Journal Vol. 34 (2003), p. 371
Jiang: Journal of Crystal Growth Vol. 292 (2006), p.192.

ACI Materials Journal, 1990, Jun-Feb: 47-53
ACI Materials Journal, 1993, Mar-Apr: 170-173
Journal of Building materials, 1999, 2(3): 193-198.
ACI Materials Journal, 1992, 89(4): 345-347
Journal of building materials, 2004, 7(1): 25-28.

In technology, it would tell us about the strength of the materials.
Ultrasonic waves are an effective means for examining and analyzing certain physical properties [10] of the materials.
The characterizing picture SEM for male and female wood materials is shown in (Figs. 7 and 8).
Graham: Forest products Journal Vol. 50 (2002), p. 59
Sales: Materials Research Vol. 5 (2002), p. 51

This paper is a basic study to evaluate the mix conditions of PCS-coating materials such as coating thicknesses, curing ages and polymer-cement ratios which affect the bond strength of PCS coated rebar with EVA latex that can replace epoxy-coated rebar.
Materials Cement.
Acknowledgement This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education, Science and Technology(2011-0003141) References [1] Baweja O., Roper H. and Sirivivatnanon V.
Chloride-induced steel corrosion in concrete: part-1-Corrosion rates, corrosion activity, and attack areas, ACI materials Journal, 3(1998)207-217
Effects of corrosion conditions on the adhesion of coated steels with polymer cement slurry, Journal of the Architectural Institute of Korea, 19(2003).77-84 [11] ACI Committee 548, Abstract of : State-f-the-art report on Polymer-Modified Concrete, ACI materials Journal, (1998)725-34

References [1]Suryanarayana C, Yoo S H, Groza J R: Journal of Materials Science Letters.
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