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Indentation with a sharp tip will introduce the cracks inside the brittle materials, as shown in Fig. 1.
Acknowledgement This project has been supported by National Science Council, Taiwan.
Moller, Basic mechanisms and models of multi-wire sawing, Advanced Engineering Materials, 6 (2004) 501-513
Evans, Elastic/Plastic Indentation Damage in Ceramics: The Lateral Crack System, Journal of the American Ceramic Society, 65 (1982) 561-566
Kao, Ultra-low load multiple indentation response of materials: In purview of wiresaw slicing and other free abrasive machining (FAM) processes, Int.

FEM is used to find the optimal design of the femoral component and to find the best material among the metals, biological, biomaterial or functionally graded material (Fig.3).
For the artificial knee implant various researches are going on for the materials.
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Richmond, The menisci: basic science and advances in treatment, Br J Sports Med. 34 (2000) 252–7
Ali Multi-objective design optimization of functionally graded material for the femoral component of a total knee replacement, Materials and Design. 53(2014) 159–173

Materials and Methods Materials.
Lucas, Diffusion and partitioning of humic acid in a porous ultrafiltration membrane, Journal of Membrane Science. 143 (1998) 13-25
Wenten, The Influence of PEG400 and Acetone on Polysulfone Membrane Morphology and Fouling Behaviour, Journal of Engineering and Technological Sciences. 48 (2016)
Liang, Deposition of powdered activated carbon (PAC) on ultrafiltration (UF) membrane surface: influencing factors and mechanisms, Journal of Membrane Science. 530 (2017) 104-111
Clark, Adsorption of aquatic humic substances on hydrophobic ultrafiltration membranes, Journal of Membrane Science. 97 (1994) 37-52

Acknowledgements This project is supported by the Key Program of Science and Technology Department of Zhejiang Province(No. 2009C13011 ).
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Jiangsu Environmental Science and Technology. 19 (2006) 27-29
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Journal of Hazardous Materials. 189 (2011) 444–449

Materials and Methods Experiments were carried out using the facilities of the Technics and Technology of Materials Production Department of the Southern Ural State University.
Li, A New Pb-free machinable austenitic stainless steel, Journal of Iron and Steel Research International, 17 (2010), 1, 59-63
Ryabov, New medium-carbon free-machining steels containing bismuth and calcium, Materials Science Forum, 843 (2016) 101-105
Ryabov, Environmental aspects of lead-free free-machining steels production, Materials Science Forum, 843 (2016) 231-235
Shiraga, Drilling of BN added free-machining steel, Journal of the Japan Society for Abrasive Technology, 1 (2008) 28-33

Science 297(2002), p. 2243
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Introduction In last two decades, nanocomposites are used in various technological areas such as optics, electronics, medicine, materials science and many other fields [1–5].
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Szunerits, Gold–graphene nanocomposites for sensing and biomedical applications, Journal of Materials Chemistry B, 3 (2015), 4301-4324 [15] M.
Semaltianos, Nanoparticles by Laser Ablation, Critical Reviews in Solid State and Materials Sciences, 35 (2010) 105-124
Menazea, Different time's Nd:YAG laser-irradiated PVA/Ag nanocomposites: structural, optical, and electrical characterization, Journal of Materials Research and Technology, 8(2), (2019), 1944-1951

Study on Dynamic Mechanical Response of TC21 Alloy Shuangzan Zhao1, Xingwang Cheng1, a, Fuchi Wang1 1 School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, China achengxw@bit.edu.cn Keywords: TC21 alloy; heat treatment; SHPB; flow stress; adiabatic shear band Abstract: Some results of an experimental study on high strain rate deformation of TC21 alloy are discussed in this paper.
Experimental Procedures The TC21 alloy bars used in this experiment were provide by Beijing Aviation Materials Research Institute.
[5] Chen Ju, Zhao Yongqing, Zeng Weidong: Effect of microstructure on impact toughness of TC21 alloy, Trans Nonferrous Met Soc China, Vol. 17 (2007), p93−98 [6] Feng Liang, etc: High temperature deformation behavior of TC21 alloy, Journal of Aeronautical Materials, Vol. 24 (2004), p11−13 [7] Qu Henglei, etc: Study on microstructure of TC21 alloy under different deformation conditions.
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S1(2006), p274−277 [8] Li Y L, Guo Y Z, Hu H T, Wei Q: A critical assessment of high-temperature dynamic mechanical testing of metals, International Journal of Impact Engineering, Vol. 36(2009): p1−8 [9] Hu Shisheng: Hopkinson bar technology, Ordnance Material Science and Enginnering, Vol. 11 (1991), p40-47 [10] Gong Xuhui: Dynamic tensile behavior of titanium alloys at elevated temperatures, The Chinese Journal of Nonferrous metals, Vol. 20 (2010), p647-654 [11] Blazynski T Z: Materials at high strain rates, London, New York: Elsevier Science, 1987: p133 [12] Q.

Experimental Materials PET fiber was supplied by Junma Fiber Company, China.
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