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Kwan and Zhirui Wang* Department of Materials Science and Engineering, University of Toronto, 184 College St., Toronto, Ontario, Canada *zhirui.wang@utoronto.ca Key words: Cyclic deformation, ECAP (Equal Channel Angular Pressing), ARB (Accumulative Roll-Bonding), cyclic stability, cyclic softening ratio Abstract With the increase of interest in using ultra-fine and nano-grained metals for structural purposes, the need to build on the knowledge pool regarding the response and behaviour of those metals under a mechanical load becomes more vital.
However, it is well known that, especially for this type of materials such as the ECAPed and ARBed materials, the thermo-mechanical history affects the mechanical behaviour of the product strongly.
There are many different methods of producing products with uf and nc grain sized metallic materials.
From the curves in Fig. 2, for Type B materials, with very small applied plastic strain amplitudes, the materials do not demonstrate apparent softening or hardening behaviour.
Kautz, In: Ultrafine Grained Materials IV, editor: Y.T.

Roberto Frias, s/n; 4200-465 Porto, Portugal amvazquez@fe.up.pt, bjdelgado@fe.up.pt Key words: mathematical models; diffusion; extraction; vegetable oils.
Reverchon et al. (1993) applied the general solution of the differential equation: (1) which is the first Fick's law for constant density and diffusivity applied to a spherical solid particle (the concentration being independent of and coordinates), and where i refers to a specific solute in the particle, Cio is the initial concentration of i, Dmi is the diffusivity of i in the solid matrix, is the material flux of i and xir is the dimensionless concentration of i.
Applying Fourier transforms and heat mass transfer analogy (Wong, 1977) it can be written: (3) where Ni is the total material extracted per unit area and particle, t is the time, R is the particle radius and ki are the solutions of periodic equation (4) These values of ki can be calculated once Kei and Dmi are known.
Therefore, Eqs. (16) and (17) can be rewritten as: (18) (19) Equations (18) and (19) can be solved if the equilibrium relationship is known, where kp is the volumetric partition coefficient of the extract between solid and fluid phase at equilibrium and is the starting concentration in the vegetable material.
Wong: Heat Transfer for Engineers (Longman Group Ltd., Birmingham AL, 1977)

Artyoma, 58, Donetsk, 83001, 1a tm@mech.dgtu.donetsk.ua; 1b anneto4ka.87@mail.ru Key words: fine disc tool with internal cutting tool, elimination of resonance, on the basis of regulated impacts, on the basis of controlled impacts Abstract: This work is aimed at improvement of durability of especially thin disc tools, by means of controlling their dynamic parameters.
Introduction It is highly advisable to try to reduce the cut width and improve its precision for cutting of especially expensive and intractable materials (mono-crystals, nanomaterials, ultra-durable combined-alloyed or high-temperature alloys). , as they possess a high degree of firmness, thus ensuring the specified parameters of precision, quality and productivity of parts cutting.
This is explained by the fact that the applied tools have low rigidity of the design and poor dynamic properties at cutting of especially expensive and intractable materials.
[2] The reference book of a machine-building production engineer in 2 volumes./ Edited by A.G.Kosilova and R.K.Mescheryakov Vol.1.

Introduction Fig. 1 Schematic diagram of rotary encoder output data Maximum output Rotation 0º Output of the Rotary encoder 360º 720º In modern industry control process, engineer sometimes needs to create a high-precision position detection system which can measures the position (displacement) or rotation of a control object in continuous large-scale with high-resolution.
At present this technology in the nuclear industry in the national key research projects - nuclear waste disposal has been applied.
Application of virtual manufacturing in materials processing [J].Journal of Materials Processing Technology, 2001(113):416~423 [5] Tian Huang, Jin Song Wang, et al.

Compared with conventional rigid conductive polymer materials, conductive TPV composites with good flexibility and considerable elasticity hold great potential for conductors, strain sensors, antistatic coatings and actuators, which meet increasing need for environmental protection conductive materials.
Experimental Materials.
Shettar, Graphene reinforced natural fiber nancomposites for structural applications, Materials science and engineering. 376(2018) 1-18
Tounsi, Frequency simulation of viscoelastic multi-phase reinforced fully symmetric systems, Engineering with Computers. 11(2020) 1-17
Chen, A computational framework for propagated waves in a sandwich doubly curved nanocomposite panel, Engineering with Computers. 08(2020) 1-18

Ion, Surface Engineering 18 (2002) 14-31
[6] Jeddi D., Sidhom H., Lieurade H.P., Nizery F., Fabbro R.: Surface Engineering, 2001, Vol. 17, No. 5, pp. 371-378
[8] Jablonski F., Varvarikes J.: Materials Science and Engineering: A, 2008, Vols. 483-484, pp. 440-443
[10] Tsay L.W., Lin Z.W.: Fatigue & Fracture of Engineering Materials & Structures, 1998, Vol. 21, No. 12, pp. 1549-1558
[11] Doong J-L., Chen T-J., Tan Y-H.: Engineering Fracture Mechanics, 1989, Vol. 33, No. 3, pp. 483-491.

Phase Transformation of Coal at High Temperature Xiao-hu Hua 1,2,a Xiao-gang wang1,2,b Jia-qing Yang1,c Shu-he Lu1,2 Li-rong Deng1,2 Li-bin niu1,2 Zi-min Fan 1,2 Jia-bo Wang 1,2 1School of Materials Science and Engineering, Xi 'an University of Science and Technology ，710054 Xi'an, Shaanxi 2Shaanxi Engineering Research centre of Energy Saving and Polygeneration in Silicon & Magnesium industry 710054 Xi 'an, Shaanxi ahxh85587373@126.com,bXGWang@hotmail.com,c283574475@qq.com Key words: Anthracite, Bitumite , High heat treatment temperature, Microstructure, Phase.
Experiment raw materials. high-quality Zhaotong Yulin bituminous coal and anthracite were used as raw materials, in which the anthracite water does not exceed 2%, ash content does not exceed 5%, volatile matter content is less than 10%, fixed carbon content is more than 85%, indiating a high-quality high-carbon low-ash anthracite.
Chemical analysis of raw materials is shown in Table 1.
Characterization: Chemical analysis of graphite products from Shaanxi Province garnierite materials and multi-generation energy-saving technology research center for chemical analysis room according to the national standard test analysis.
Acknowledgements Yunnan Province scientific and technological project (201440), Yulin City scientific and technological project (201346) and Xi'an University of Science and Technology nurture Fund (201303) First author: Xiaohu Hua , male, born in 1978, PhD, engineer; research direction for the new carbon materials.

Materials, such as HIPS, ABS, PMMA, PC, and ABS, PMMA (5:1.5) mixtures have been tested.
Experimental Materials.
So it is widely used in machinery, automobile, electronic, instrumentation, textile and construction, and is very widely used as a kind of engineering thermoplastics.
With injection molding materials, prepared with increasing transverse ultrasonic vibration, ABS, ABS and PMMA mixture of materials are used in testing the mechanical properties of test samples.
Zhai: Polymer Materials Science and Engineering, Vol. 15（1999）No. 5, pp. 8-12

With more and more deep-engineering appearing, Chinese academic workers began to put attention on this phenomenon and carried out a series of research.
A review of research on zonal disintegration phenomenon in deep rock mass engineering[J].
Chinese Journal of Rock Mechanics and Engineering,2008,27(6): 1278–1284.
[3]Mingyang Wang , Hua Song , Daliang Zheng , et al.On mechanism of zonal disintegration within rock mass around deep tunnel and definition of“deep rock engineering”[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(9):1771–1776.
Chinese Journal of Rock Mechanics and Engineering,2008, 27(3): 433-438

Selected Properties of Bearings with Helical Groove on the Journal SEP Jaroslaw Rzeszow University of Technology Faculty of Mechanical Engineering and Aeronautics, W.
Pola 2 35-959 Rzeszow, Poland jsztmiop@prz.edu.pl Key words: slide bearing, wear, oil, contamination, load carrying capacity, helical groove, oil flow rate.
A two-component surface layer was created by copper located in helical groove in the base material (steel).
This layer was manufactured also in order to create triangular groove in materials contact zone.
Lubrication Engineering, 58 (2002) 34-39