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Materials and Experimental Program Fine-aggregate concrete mixtures with natural sand and various replacement by fine recycled aggregate were prepared for examination of mechanical properties and freeze-thaw resistance of concrete.
Holčapek, Resistance of refractory cement composite to cyclic temperature loading, Key Engineering Materials 677 (2016) 23–28
Pavlů, Non-Destructive Testing of Concrete with Fine Recycled Aggregate, Applied Mechanics and Materials 825, (2016) 63–68

The Mössbauer Spectrum Research of the lanthanon compound Tb3Fe29-xCrx Hongli Liu1, 2, a, Min Huang2, b , Qiu Feng 2, c 1 China University of Geosciences (Beijing), Beijing, 100083, China 2 College of Resource Environment & Tourism, Capital Normal University, Beijing, 100048, China a hongli_liu2008@yahoo.com.cn, bhuangxm0@gmail.com, cqiufengok@126.com Key Words: Lanthanon Compound, Mössbauer Spectrum, Crystal Structure, Priority Occupation Abstract.
The nitride and carbide of Sm3Fe29-xTx (T=Ti, v, Cr, Mo) are considered as the (most valuable) candidate materials of the new lanthanon permanent magnetic material [2], so the further study of the physical properties of R3Fe29-xTx is with a great academic significance.
It was found in recent year that the element Ti can prevent the formation of a -Fe efficiently and it is also a stable element for the formation of Sm-Fe-T 3:29 phase; the even structure of the as-cast alloy can be gained after melting at least four times; the evaporation of Sm can be reduced by adding different materials in a reasonable order, a surplus of 20% - 30wt% of Sm can compensate for the loss of Sm; successfully prepare the Sm3(Fe, Ti, Co)29 3:29phase mother alloy [2]. 1.
[2] Liang Zhi-mei; CUI Chun-xiang; SUN Ji-bing （ School of Material Science and Engineering; Hebei University of Technology; Tianjin 2003; China） [3] Xia Y F, Base and Application of Mössbauer Spectroscopy.

The coated CBN and inserts of non-coated [2]has proven to be a technologically viable tool material for producing precise parts with high degree of accuracy, geometry and surface finish.
Experimental details 4.1 Workpiece material The machined workpiece material taken up for this study is AISI M2 die steel, having hardness up to 62-64 HRC.
The machined workpiece material is a shaft with a dimension of 30mm in diameter and 80mm in length.
Acknowledgement We profound our sincere thanks to the DoME, CEG, Anna University Chennai, also Rajalakshmi Engineering College, Thandalam, Chennai for their continuous encouragements and supports.
Batalha, “Hard turning of tempered DIN 100Cr6 steel with coated and no coated CBN inserts,” Journal of Materials Processing Technology, vol. 179. pp. 146–153, 2006

Phase Transformations and Super-Elasticity of a Ni-rich TiNi Alloy with Ultrafine-Grained Structure Zhiguo Fana, Jie Songb, Xiaoning Zhangc and Chaoying Xied State Key Lab.
Of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China afanzhiguo1999@yahoo.com.cn, bjies@sjtu.edu.cn, czxn100@sjtu.edu.cn, dcyxie@sjtu.edu.cn, Keywords: Equal Channel Angular extrusion, TiNi shape memory alloy, Ti3Ni4 preciptitates, R phase transformation, Martensitic transformation, Super-elasticity.
[17] Xu, X.C., Liu, Z.Y., Dang, P., et al., Materials Heat Treatment. 30 (4), 1-6 (2005) [18] Horita, Z., Oh-ishi, K., Kaneko, K., Sci Technol Adv Mat. 7, 649-654 (2006) [19] Dang, P., Xu, X.C., Liu, Z.Y., et al., Transactions of Materials and Heat Treatment. 28 (5), 82-85 (2007) [20] Xu, X.C., Liu, Z.Y., Li, Y.T., et al., Trans Nonferrous Met Soc China. 18, 1047-1052 (2008)

Numerical simulation of impact-echo method identify the depth of honeycomb damage in unballasted track Changsheng Zhoua,Ping Wangb,Zhipeng Huc,Hao Zhud MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu, 610031, CHINA a1152220953@qq.com,bwping@home.swjtu.edu.cn,c779355629@qq.com,d417268042@qq.com Keywords: slab ballastless track; double-block ballastless track; impact echo; honeycomb damage Abstract.
Nowadays, concrete injury testing methods are much more than before, but most of them are restricted by the different materials layered structure of unballasted track and a certain amount of steels in track slab.
Table 1 Material parameters of unballasted track Material Density（Kg/m3） Elastic modulus (MPa） Velocity（m/s） Poisson's ratio Track plate /slab 2500 3.65e4 4000 0.2 CA mortar 1548 300 500 0.2 Support layer 2500 3.45e4 3900 0.2 In order to simulate impact stress wave, the impact force of the ball hits the track plate is taken as half-sine force.
Owing to bed slab and support layer are constituted by the same material and they have similar wave impedance, stress wave reflection is obvious near the damage area, therefore, with the distinct peak in the corresponding spectrum graph, the depth of damage can be accurate located.
(2) In the double-block ballastless track, bed slab and support layer are constituted by the same material and they have similar wave impedance, in addition to part of stress wave reflection occur in the damage area, most of the stress wave occur transmission, that make the damage peak more obvious in the spectrum graph

Preparation of 1D or 3D Nano ZnO Crystals in High-viscosity Solvent Pengfei Gu1, a, Xudong Wang1, b*, Xiangke Wang2, c, Qinglong Liu1,d and Huimin Meng1, e 1Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China 2China Academy of Space Technology, 104 Youyi Road, Beijing 100094, China agpfsensen@gmail.com.cn, bxdwang@ustb.edu.cn, cxkwang@126.com.cn, dlql577125@126.com.cn, eecm@ustb.edu.cn Keywords: ZnO, 1D or 3D morphology, High viscosity solvent, Solvothermal process.
Introduction ZnO is one of the most promising materials for fabricating optoelectronic devices, owing to its large exciton binding energy of 60meV, wide band gap energy of 3.37eV at room temperature, and various controllable morphologies which could improve properties of ZnO crystals.
Hydrothermal or solvothermal technique has several advantages to prepare nano-scale ZnO and other semiconductor materials over other growth technique, such as low cost and large scale production.
To control nanoparticle formation in solution, the properties of the solvent, such as viscosity [12], dielectric constant [13], saturated vapor pressure [11], polarity [14], and chain length [10] of organic solvent have been proposed to be key parameters.
Acknowledgment This work is supported by the National Natural Science Foundation of China (Grant no. 50502006), the Open Foundation of Science and Technology on Reliability and Environmental Engineering Laboratory (2011), and ‘12th Five-Year Plan’ Project: Improving the Reliability of Satellites and Rockets and Promoting the Productization (2013).

Materials and Methods Materials.
Rangsimawong, Design and Investigation of Optimal Dissolving Polymeric Microneedles for Ocular Application by Using Three-Level Factorial Design, Key Engineering Materials. 914 (2022) 63-68

Fluoride Influence on the Properties of Oxide Layer Produced by Plasma Electrolytic Oxidation Barbara Kazanski1, a, Alexei Kossenko1,b, Alex Lugovskoy1,c and Michael Zinigrad1,d 1Department of Chemical and Materials Engineering, Ariel University Center of Samaria, Ariel, Israel abarbarak@ariel.ac.il,bkossenkoa@ariel.ac.il,clugovsa@ariel.ac.il, drector@ariel.ac.il Keywords: Plasma electrolytic oxidation, ceramic coating, oxide layer, magnesium alloys, aluminum alloys.
Materials identification and analysis made by the PDF-2 Release 2009 (Powder Diffraction File).
XRD phase analysis confirms than the key role at the initial stage of the oxidation is played by magnesium oxide and only on the surface aluminum starts to be oxidized to form Al2MgO4 and MgO.
[6] HongfeiGuo, MaozhongAn, ShenXu, HuibinHuo: Materials Letters Vol. 60 (2006), p. 1538

4 The effect of material nonlinearities The key-question for the chimney design now is: Can we achieve similar savings of meridional reinforcement, but avoid such extremely strong ring-stiffeners like those ones of a 100-fold multiple of the standard stiffness leading to analogous high reductions of tension forces like in Figs. 7 or 8?
IABSE Journal of Engineering Structures Vol. 22 (2002), p. 107-109
Lui (eds.), Handbook of Structural Engineering, p. 27/1-27/41, CRC Press, Boca Raton (2004)
Center for Numerical Methods in Engineering (1997)
Journal of Solar Energy Engineering, Vol. 127 (2005), p. 117-124

AEC: A New Tool for EET, TFDC and Crystal Formula Shichun Li Department of Material Science and Engineering, China University of Petroleum, Dongying, China lishch@hdpu.edu.cn Keywords: Atomic Environment; Point Group; Empirical Electron Theory; TFDC, Crystal Formula.
The Method of AEC For a crystal structure with known lattice parameters and atomic coordinates, the basic materials science issue is how to exactly calculate every atom's environment in space, i.e. distribution of neighbour atoms around every atom.
For complex crystal structure, calculation of pair coordination number is the key step in calculation of equivalence bond number.
Thus it can be seen that correct calculation of bond networks is the key step in the application of EET to the calculation of valence electron structure.
AEC may output atomic environment data in 0, 1, 2, and 3 dimensions which correspond to many basic materials science problems, such as local cluster, closest packed direction, closest packed plane, and various interstitial spaces in crystal corresponding to 0, 1, 2 and 3 dimensions problems, respectively.