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Rotor cracks are generally due to the fatigue damages of the rotor components which caused by the cyclic loading beyond the yield limit of the materials of the rotor components.
(11) The reflects the ability of the material resistance to fracture damage, known as the material fracture toughness.
Acknowledgement Financial support from National Natural Science Foundation of China (51075140), Natural Science Foundation of Hunan Province Key Project (09JJ8005), Project Sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, Science and Technology Planning Key Project of Hunan Province (2010FJ2012), Aid program for science and technology innovative research team in higher educational institutions of Hunan province, are gratefully acknowledged.
Zhao: Fracture Mechanics(Science Press, Beijing 2006)
Xu: Journal of Beijing Institute of Technology,Vol.17-1(1997),P.55-60

Materials and Experimental Procedure The investigated magnesium sheets have the chemical composition as shown in Table 1.
Metallic materials exhibit the least formability, because fracture is caused the constriction of minor strains and thus lesser material is locally available for deformation.
Yoshida, Effects of strain rate, temperature and sheet thickness on yield locus of AZ31 magnesium alloy sheet, Journal of Materials Processing Technology 201 (2008) 395–400
Rees, Factors influencing the FLD of automotive sheet metal, Journal of Materials Processing Technology 118 (2001) 1–8
Barnett, Twinning and the ductility of magnesium alloys Part I: “Tension” twins, Materials Science and Engineering: A 464 (2007) 1–7

Materials and Methods Microorganism strain The bacterial strain of Bacillus sp.
Statistical analysis Statistical analysis was conducted using Excel 2003 (Microsoft Corporation, Redmond, WA) and SPSS 19.0 (Statistical Package for Social Science, Chicago, IL, USA) for Windows.
Journal of Environmental Sciences. 2012, 24: 1662-1669
Journal of Environmental Sciences. 2006, 18: 1204-1209
Journal of Hazardous Materials. 1999, B69: 25-39

Materials and methods Chemicals PNP (>98% purity) was obtained from Aldrich–Sigma Chemicals Co.
Acknowledgement This work was financially supported with a grants issued by the National Natural Science Foundation of China (41101226, 50879029) and Science and technology projects, Ministry of Housing and Urban of China (2011-k4-4) .
References [1] Y.L Zheng, D.L Liu, and S.W.Liu: Journal of Environmental Sciences , Vol.21(2009)p.1194 [2]M.
Zhang, Y.Yan: Journal of Environmental Science and Health, Part B.
Vol.59(2007), P.90 [11]J.S.Zhang, Z.T.Sun, Y.Y.Li, X.Peng, W.Li, Y.C.Yan: Journal of Hazardous Materials.

The orthogonal planes technique could be achieved with apparatus easily available in most materials’ science laboratories.
[2] Holm, E.A., and Duxbury, P.M., 2006, "Three-dimensional Materials Science," Scripta Materialia., 54(6), pp. 1035-040
Materials Science and Engineering., A 382, pp. 112–121
L., and Ahzi, S., 2001,"Statistical Continuum Theory for Large Plastic Deformation of Polycrystalline Materials,” Journal of the Mechanics and Physics of Solids., 49, pp. 589-607
Materials Science and Technology, 38(12), 765-779. https://doi.org/10.1080/02670836.2022.206505 [39] Shi Q, Wang C, Deng K, Nie K, Liang W.

As-prepared HA-MWCNTs composite coatings combining the osteconductive property of HA and the excellent mechanical property of MWCNTs will provide a promising material for potential bone replacements.
Materials and methods Preparetion of HA-CNTs composite coatings The HA sol was fabricated from its precursorsCa(NO3)2·4H2O and P2O5.
These findings suggest that Adding MWCNTs in the HA coatings will provide a promising material for potential bone replacements.
Acknowledgments This work was supported by Science and technology bureau of Wenzhou City(No.2011S0088) and Natural Science Foundation of Zhejiang Province(Y2110401 and Y12H140011).
Serna, Journal of Applied Ceramic Technology 4 (2007), p. 1

i Experimental Materials.
Key Engineering Materials Vols. 264-268 641 A B C Figure 4.
Zaharescu: Journal of Membrane Science Vol. 210 (2002), pp. 197-207
Sperling: Interfacial Aspects of Multicomponent Polymer Materials (Plenum Press, New York 1997)
Bae: Journal of Sol-Gel Science & Technology Vol. 26 (2003), pp. 981-984.

Altintas, and E.J.A: Journal of Manufacturing Science and Engineering(1996), No. 118, p.216-224
Tlusty: Journal of Engineering for Industry(1991), No.113, p.169-175
Ismail: Journal of Engineering for Industry(1993), No.115, p.245-252
Elbestawi: Journal of Engineering for Industry(1994), No.116, p.435-439
Kendall: Journal of Engineering for Industry(1994), No. 116, p.324-339

Research on the Carbonation of Cement Paste Modified with Layered Double Hydroxides Liangjun Chen1, a, Xiaoxing Chen2,b and Wei Chen3,c 1, 2, 3School of Material Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, 430070, China achenliangjunstars@foxmail.com, bxxchen@whut.edu.cn, cw.chen.whut@gmail.com Keywords: cement paste; layered double hydroxides; carbonation depth; carbonation resistance Abstract.
Materials and Methods Materials.
Table 1 Properties of Materials Material Density (g/cm3) SSA (m2/kg) Setting time (min) Initial Final Cement 3. 09 397 170 243 Fly ash 2. 56 370 - - Table 2 Chemical Compositions of Cement and LDHs (%) Materials SiO2 Al2O3 Fe2O3 CaO MgO Na2O SO3 K2O MnO L.O.I.
Journal of Shanghai building materials institute, 1990, (4) : 397-406.
The preparation of LDHs intercalated with dihydrogen phosphate and its performance of selective absorption of the infrared, Journal of inorganic chemistry, 2010, 26 (6) : 970-976.

Soft magnetic properties of [Fe80Ni20-O/NiZn-ferrite]n multilayer thin films for high frequency application Rui Xu, Laisen Wanga, Xiaolong Liu, Meng Lei, Qing Luo, Yuanzhi Chen, Dongliang Pengb Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, P.
Therefore, how to obtain soft magnetic materials with high resistivity, high ferromagnetic and high permeability under high frequency becomes one of the research focus in present.
Journal of Applied Physics, 2008, 103(7): 07E927-07E927-6
Advanced Materials Research, 2013, 690: 1702-1706
Journal of applied physics, 1988, 63(4): 1046-1051.