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Detection of Phase Transition in Free-Cutting Al-Mg-Si Alloys by Resonant Ultrasound Spectroscopy Jitka Nejezchlebová1, 2,a, Hanuš Seiner2, b and Miroslav Karlík1, c * 1Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Trojanova 13, 120 00 Prague 2, Czech Republic 2Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Dolejškova 5, 182 00 Prague, Czech Republic anejezjit@fjfi.cvut.cz, bhseiner@it.cas.cz, cmiroslav.karlik@fjfi.cvut.cz Keywords: free-cutting alloys, resonant ultrasound spectroscopy, differential scanning calorimetry.
It is clearly seen that the used thermal cycle induced some irreversible changes to the material.
Acknowledgment This work was supported by the Czech Science Foundation in the frame of the project “Multidisciplinary research centre for advanced materials” (14-36566G).
Doty, Machinability aspects of new Al-Cu alloys intended for automotive castings, Journal of Materials Processing Technology 210 (2010) 1754-1766
Nejezchlebová, Measuring the temperature dependence of resonant ultrasound spectra of alloys Al-Mg-Si with additions of low melting point metals, Research project, CTU in Prague, Department of materials (2012) (in Czech)

Wayman, C.M., Shape Memory Materials, Cambridge University Press, Cambridge, 1998
Advanced Materials Research (Online), 936 (2014) 1216-1223
Yao, Annealing Effect on the Shape Memory Properties of Amorphous NiTi Thin Films, Journal of Manufacturing Science and Engineering, 132 (2010), 051004-1- 051004-9
%Ni Thin Wires Produced by Different Methods, Materials Science Forum, 738-739 (2013), 306-310
Materials Science and Engineering A, 378 (2004), 191-199.

Effect of Oxygen Partial Pressure on Formation of Fe2O3 Nanostructure during Thermal Oxidation Jingzhe Wanga, C H XUb*, Yufei Youc and Junpeng Wangd School of Materials Science & Engineering, Henan University of Science & Technology, P.O.
Applied Mechanics and Materials Vols, 2012, 204-208: 4207-4210 [4] Zhang LD.
Advances in the study on Nano-sized Fe2O3 Gas-sensing Materials[J].
Electronic Components & Materials, 2003, 22(5):35-39 [6] Wang X, Lu LD.
Chinese Journal of Inorganic Chemistry, 2000, 16(2):213-217

Modal Analysis of Five-Layer Vertical Structure Platform Beiyi Ma1,a , Hua Song1,b , Chengzhong Yu2,c , Qian Liu1,a 1 School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan, China; 2Anshan iron and steel group corporation, Anshan, Liaoning, China ambeiy@126.com, bsonghua88@126.com, ctclan1987@163.com Key words: structure platform, modal analysis, static analysis Abstract.
The other one is material can be linear, isotropy or anisotropy, constant or relating with temperature in model analysis[1-3].
Rigid connection method is adopted between the supporting pillar with the main structure beam and strengthen beam of the supporting platform, and hinge node connection is adopted between corner steel constituting a stable system with edge support column and supporting pillar; All steel structure materials adopted in simulation are assumed to rational elastic materials; All steel structure component materials are assumed to linear elastic materials, and meet Hooke’s law, at the same time, in the simulation process Skin effect of steel plate is ignored.
To sum up, it can be seen from the analysis result statistics, all the calculated data is in the safety range of materials allowed, namely, the integral design that the coke powder tank supports platform can satisfy the requirement of production.
Journal of Wuhan university of science and engineering (traffic science and engineering edition) the 31st volume, the 6th period:199,299,399,499, in December 2007

Experimental materials and methods The test materials using annealed Ti-6Al-4V alloy, chemical composition (mass fraction,%) of 6.26Al, 4.23V, 0.05Fe, 0.012Si, 0.017N, 0.021C, 0.014O, 0.002H, the rest for Ti.
Science and Technology of Advanced Materials, 2003(4):45-454
Advanced Materials Research, 2011, ( 197-198): 1524-1527
Metallurgical and Materials Transactions A, 2003, 34: 2377-2386
Titanium metal science and heat treatment [M].

Ivanov 1,a 1 Institute of Strength Physics and Materials Science, SB RAS, 634021, pr.
Grabovetskaya, et al: Grain boundary diffusion and properties of nanostructured materials (Cambridge International Science Publishing, UK 2007)
Ivanov, et al.: International journal of refractory metals and hard materials Vol. 21 (2003), p. 69 [5] V.A.
Nuclear Materials Vols. 307-311 (2002), p. 701 [8] Q.
Humphreys: Journal of materials science Vol. 36 (2001), p. 3833 [12] M.V.

Experimental Procedures Raw materials.
Cu, Ti and B4C powder in industrial purity with molar fraction of 72%Cu,14%Ti,14%B4C were utilized as laser cladding raw materials.
[3] S.Y.Qu,X.H.Wang,M.Zhang,Microstructure and wear properties of Fe-TiC surface composite coating by laser cladding,Journal of Materials Science.43(2008)1546-1551
[6] Y.J.Liu,Y.S.Wang,X.C.Yang,Study on Wear Resistance of Plasma Sprayed Coating Re-melted by Laser,Key Engineering Materials.6(2008)373-374
[7] Y.Chen,H.M.Wang,Microstructure and wear resistance of a laser clad TiC reinforced nickel aluminides matrix composite coating,Materials Science Engineering.368(2004)80-83

Table 1: Physical Properties and Chemical Analysis of Materials.
[6] Yong Z., Mingzhong Z.,” Transport Properties in Unsaturated Cement-Based Materials – A Review”, Construction and Building Materials, 72,15 (2014), pp. 367-379
H., “Simulation of Chloride Migration in Damaged Self Compacting Concrete”, ASCE Materials Journal, 24, 7, (2012), pp.658-667
ASCE Journal of Materials in Civil Engineering, 26, 4, 658-667
[12] Jiaying Sun and Liguo Lu, "Coupled effect of axially distributed load and carbonization on permeability of concrete", Construction and Building Materials, 79, 2015, pp. 9–13

The tensile stress-strain curves shown in Figs. 1 and 2 illustrate the behavior of asrolled and pre-strained materials after aging.
Gladman: Material Science and Technology Vol. 15, (1999), p. 30
McPherson: Metal Science, (1979), p. 611
Baker: Metal Science, (1979), p. 228
Barnby: Journal of The Iron and Steel Institute, (1965), p. 392

Additionally, the construction action and embankment materials disturb the original heat exchange between the underlying permafrost and ambient environment [1~3].
Based on the characteristic of heat transfer of embankment materials, the response of underlying permafrost between two framed embankments decreases and approximates to the permafrost underlying the natural ground when the distance is large enough.
Parameters for each material are shown in Table 1.
Science Press, Beijing, 2009, 35-81
Science Press, Beijing, 2002