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Introduction The rare-earth (RE) doping of Si and Si-related materials [1-8] in the last years has been extensively studied for the development of light-emitting devices in the Si-based optoelectronics initiated by the reports on the photoluminescence (PL) and electroluminescence (EL) centered at around 1.54 μm of Er3+ (4I13/2→4I15/2) in Si [9].
Er Yb codope is an efficient way to improve the luminescence efficiency of Er in Si-related materials.
This work is supported by the Natural Science Foundation of Shandong Province, China (Grant No.
XNBS1341) and the Science and Technology Plan Project of Jinan City, China (Grant No. 201202092, OUT_02440).
Wang, et al.: Journal of Shandong Jianzhu University Vol. 24 (3) (2009), p. 212 [4] M.

Journal of Intelligent Manufacturing, 33(7), 2143-2155
Materials Transactions, 52(3), 447-451
Journal of Engineering for Industry, 101, 36-44
Journal of Materials Engineering and Performance, 30(1), 1-32.[19] Zhao, P., Jiao, J., Tang, Y., & Fang, G. (2021).
Journal of Manufacturing and Materials Processing, 7(4), 145.

Sha 1 1 Jiangsu Key Laboratory of Precision and MicroManufacturing Technology, NUAA, Nanjing, 210016, China a mh0514@163.com Keywords: shot peening; over peening effect; surface integrity Abstract: Shot peening is known to improve the fatigue performance of materials.
So the material could not remain great internal stress.
Measurements at different depths were performed after subsequent material removal using electrolytic polishing procedures with a non acid solution.
Chen: International Journal of Machine Tools & Manufacture, 2007, 47: 1667-1676
Yang: Materials Letters. 2007, 61: 466-469 [4] C.

Empirical Modeling of High-speed WEDM Finishing in Gas Yumei Lu 1,2,a , Tong Wang 1,b , Chaoqun Wang1,c and Chengwen Wang1,d 1 Mechanical & Power Engineering College, Harbin University of Science &Technology, 52 Xuefu Road, Harbin, China, 150080 2School of Mechanical Engineering, Heilongjiang Institute of Science and Technology, Harbin, China, 150027 alym73217@163.com,bwangtong@hrbust.edu.cn,cwangchaoqunlvcha@163.cm, d24650581@qq.com Keywords: HS-WEDM in gas, Surface roughness, Cutting speed, Central composite design (CCD) Abstract.
Chinese Journal of Die and Mould Industry, 2008,34 (5) : 71-74
State of the art in wire electrical discharge machining (WEDM) [J].International Journal of Materials Processing Technology,2004, 44 (12-13) : 1247-1257
Experimental Studies on Dry WEDM in Improving Surface Quality.Materials Science Forum Vols,626-627 (2009) p .327
Dry WEDM in Improving HS-WEDMed Surface Quality Key Engineering Materials Vols,392-394 (2009), p.624

In the limit as , this power law approaches that of a rate-independent material.
Those caused from material in-homogeneity are reflected in the formula of the model.
Huang: A user-material subroutine incorporating single crystal plasticity in the abaqus finite element program，Mech,178 (1991) [8] Y.Q.
Gurtin: Journal of the Mechanics and Physics of Solids 51,1015-1058.(2003) [20] Rosakis.
Ponthot: International Journal of Solids and Structures 42,5615-5655.(2005) [23] Belytschko T., W.K.

Introduction Nowadays, magnetic amorpho-nanocrystalline materials find wide practical application.
One of the popular methods for creating such materials is the method of directional crystallization from an amorphous state.
Therefore, the issue of studying kinetics of amorphous materials properties during annealing is actual [1].
/Central European Journal of Physics 2(1) 2004 104-119
Crystallization Kinetics of Amorphous Materials.

Firstly, raw materials in powder form are prepared.
Secondly, mixed raw materials undergo cold compaction in rigid dies with specific shapes.
Powder metallurgy method was carried out since all the raw materials are in powder form.
Since the strength of bonding between the fibre and matrix materials relies on the viability of interdiffusion, the technique of assembling strengthening together fibres and matrix materials depend upon the type of fiber[9].
"Introduction - Composite Materials and Optical Microscopy."

Reuse System of Building Steel Structures - Structural performance of reusable members and practical examples Masanori FUJITA Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai,Ube 755-8611, Japan fujitam1@yamaguchi-u.ac.jp Keywords: Building steel structure, Environmental burden, Reusable member, Cyclic loading test, FEM analysis, Practical example Abstract.
Implementing any of the following measures can be effective in reducing the environmental burden in the life cycle of building steel structures: extending the service life of buildings themselves; reuse, which is extending service life at the structural member level; and recycling, which is extending service life at the material level (Fig.1).
However, this recycling of iron and steel materials is now at a turning point because of the time consuming scrapping process and management problems that exist at electric furnace manufacturers.
Such excellent material properties render steel suitable for reuse.
This building is a non-fireproof low storied steel structure which roof and wall materials are corrugated slate.

Titanium alloy, however, is one of the difficult-to-cut materials [1].
And the main parameters which influence the above factors are cutter materials, geometrical parameters and machining data etc.
The wear-resistance of cemented carbide YT726 is better than that of other cutter materials for titanium alloys deep-hole drilling.
Kirkwood: Journal of Materials Processing Technology, Vol.107 (2000), pp.222-227
Fang: Design of Orthogonal and Even Test (Science press, Beijing 2001).

Millare1,b 1School of Chemical, Biological and Materials Engineering and Sciences, Mapúa University, Muralla Street, Intramuros, Manila, 1002, Philippines ajdlopena@mymail.mapua.edu.ph, bjcmillare@mapua.edu.ph Keywords: Drone, Airframe, Salago, Fiber, Composite Abstract.
Some of the materials used in drone airframe include composites reinforced with synthetic fibers such as carbon, aramid and glass fibers [13].
Consequently, natural fibers can be used as alternative reinforcing materials in composites because of their good environmental benefits, lower density and affordability [16].
Methods Materials and Sample Types.
Shyama: International Journal of Innovative Research in Electrical, Electronics, Instrumentation and Control Engineering Vol. 5 (2017), pp. 121-123 [11] B.