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Materials and Methods Experimental material.
The potential is probably restricted on to the materials with brittle fracture.
Rawlings, Material Science and Technology, Vol. 5(1989) pp865 [3] D.
Lesage, Vickers Indentation Fracture (VIF) modeling to analyze multi-cracking toughness of titania, alumina and zirconia plasma sprayed coatings, Materials Science and Engineering A Vol. 527 (2009) pp 65 - 76 [4] N.H.
Swain, Microfracture beneath point indentations in brittle solids, Journal of Materials Science Vol. 10 (1975) pp 113-122

Introduction Titanium and its alloys are known as advanced materials in the astronautic industry for their superior physical and mechanical properties (e.g. high strength-to-weight ratio, high toughness, super corrosion and creep resistance, and biocompatibility) [1].
Therefore, the more desirable materials are needed to ameliorate the poor machinability of titanium alloys [3].
The particle reinforced titanium matrix composites (PTMCs) is more appropriate compared to titanium and titanium alloys owing to several attractive characteristics such as elastic modulus, high temperature property, super wear and oxidation resistance, and stable combination with the matrix materials, which are required in machining the critical structural components [4].
Strohaecker, Mechanical and metallurgical properties of friction-welded TiC particulate reinforced Ti-6Al-4V, Composites Science and Technology 2004; 64: 1495-1501
A review on particulate-reinforced titanium matrix composites, Journal of Materials Science 1997; 32: 1-16

However, it is one of the most difficult-to-machine materials due to its mechanical characteristics.
Ultrasonic machining has been introduced to machine hard and brittle materials since early 1950s.
Kim: Journal of Materials Processing Technology, Vol. 191 (2007) No.1-3, pp.153-156
Khamba: Journal of Materials Processing Technology, Vol. 173 (2006) No.2, pp.125-135
ASME, Journal of Manufacturing Science and Engineering, Vol. 118 (1996).

Table 1 Chemical Composition (%) of Q345E Steel Designation of Material C Si Mn P S V Nb Ti Al Q345E 0.15 0.32 1.48 0.011 0.003 0.02~0.15 0.015~0.060 0.02~0.20 0.032 According to GB / T 6398-2000 “Experimental Methods for Fatigue Crack Growth Rate of Metal Materials", experiments were conducted by using the equipment MTS 810 material testing system under the conditions as follows: the maximum load , the stress ratio , the frequency of 10 Hz, the load waveform of a sine wave.
Fig. 1 Curve Fig.2 Curve In accordance with the Pairs Equation [1]: (4) Where: is the crest value of the stress intensity factor, C and m is the constant of materials.
With the increasing rate of crack growth, it goes up while the Constant C of the materials in the Pairs Equation becomes gradually smaller and Constant m increases.
The crack growth rate da/dN corresponding to different survival rates p goes up with the increasing rate of the survival rate, the Constant C of the materials in the Pairs Equation becomes gradually smaller and the Constant m increases.
Erdogan; A Critical analysis of Crack Propagation Laws; Journal of Basic Engineering; Vol. 85(1963) ; p. 528-534 [2] Dr.

Welding fixture (b) (a) (c) 2.3 Materials The plates Plates are CR440Y780T and TL 4225.
Guo, et al, Study of rare earth elements on the physical and mechanical properties of a Cu–Fe–P–Cr alloy, Materials Science & Engineering B. 147 (1)(2007) 1-6
Zou, et al, Surface modified long-life electrode for RSW of Zn-coated steel, Journal of Materials Processing Tech. 209(8) (2008) 4141-4146
Watanabe, et al, Mechanical properties of Cu–Cr system alloys with and without Zr and Ag, Journal of Materials Science. 43(3) (2008) 813-819
Krishna, et al, Enhanced Strength in Cu-Ag-Zr Alloy by Combination of Cold Working and Aging, Journal of Materials Engineering and Performance. 23(4) (2014) 1458-1464

Linseed is rich in flax gum, and it can be used as food additives, cosmetics raw powder, pharmaceutical raw materials.
It can be used as food additives, cosmetics raw powder and pharmaceutical raw materials.
All of these characters make it become the industrial raw material of waterproof, printing oil and oil color printing.
Acknowledgment This study is sponsored by National Social Science Foundation of China (09BTQ022).  
References [1] Chen C, “CiteSpace Ⅱ：Detecting and visualizing emerging trends and transient patterns in scientific literature,” Journal of the American Society for Information Science and Technology, vol 57, pp. 359－377,2005

The primary coolant of High-Temperature Gas-cooled Reactor (HTGR) is expected to contain impurities that can make corrosion to structural metallic materials at elevated temperatures.
The impure helium presents new challenges to the properties of materials under very high temperatures.
Journal of Nuclear Materials, 140(2): 94-105 (1986)
Materials and Corrosion, 36(8): 141-150 (1985)
Materials & Corrosion, 36(8): 335-347 (1985)

Therefore, the chitosan-based materials have become a new generation of promising local hemostatic agents that are undergoing active development.
Figure 2 Coagulation time in vitro and in vivo: Dymatic clotting time in vitro（A）showed D1 and D2 possessed excellent hemostasis in vitro superior to other materials.
Journal of Applied Polymer Science, 2011,121(4):2239-2249 [8] Braun JL, Kadla JF.
Journal of Applied Polymer Science 2009,14 (5): 3303-3309
Journal of controlled release. 1990, 13:21-31 [11] Ong SY, Wu J, Moochhala SM, Tan MH, Lu J.

The structure of the materials has strong effects on the fracture parameters and strength.
Zerbino: Advanced cent based materials, Vol 7(1998): p.41 [2] A.
Belaabes: Construction and Building materials, Vol.24(2010): p.505 [7] RILEM-Draft-Recommandation (502FCM) : Materials and Structures, Vol.18 (1985) : p.285 [8] X.
In: Fracture Mechanics of Inorganic Non-metallic Materials, edited by F.F.
Wu: Journal of Building Materials, Vol.2(1999), p.206 (In Chinese)

Journal of materials processing technology 2008; 206: 395-9
Journal of materials processing technology 2008; 201:701-5
Materials Science and Engineering of Powder Metallurgy 2011; 16: 61-6
Journal of Aeronautical Materials 2010; 30: 30-5
Journal of Aeronautical Materials 2007; 27: 45- 8