Search results

The characteristics and influence factors of µLSP were briefly introduced, and progress in µLSP research fields was reviewed and presented, including laser induced shock pressure, material constitutive relation, changes of mechanical properties and microstructure evolution of materials.
Practically, the success of the study of µLSP will provide effective and flexible technique for mechanical property modification of metallic structures in microsystems.
Influence Factors of µLSP Laser parameters, process conditions and material features are the most important influence factors in µLSP, in addition, micro-size effects in micro-plastic deformation also have a significant impact on the process of µLSP.
In this way, many properties of material are greatly different from that at macroscopic, the target material must be considered as anisotropic and inhomogeneous [6-8]. 2) Material features.
Fig.3 Sample geometry and laser shock peening condition[5] To quantitatively characterize the material properties, samples treated by µLSP were tested and analyzed from the macroscopic and microscopic, respectively.

In this experiment, the instrumental detective conditions were determined, and analyzed several main factors affecting the experimental results, concluded the effects of temperature, hydrofluoric acid and deionized water on dissolving zirconium powder, summarized the method to detect zirconium powder content directly by ICP.
Introduction Zirconium and zirconium alloys possess outstanding nuclear performance, beside it have excellent corrosion resistance and mechanical performance, have been applied extensively in civilian area of energy, petroleum, chemical industry, pharmacy, medical equipments and light industry and so on, also as an important additional element of high property magnesium alloys [1], the additive of medium temperature nuclear materials [2], armament industry and aerospace new materials [3].
Detective results and influence factors as shown in the Tab. 1.
The influence of solution temperature on the test results ICP-AES plasma test method belongs to trace test, so pay attention to eliminate all influential factors for the experiment is needed.
References [1] Chen Bin, Lu Chen, Lin Dong-liang, Effect of zirconium addition on microstructure and mechanical properties of Mg97Y2Zn1 alloy [J].

Study on the Crack Extension Properties under Ultrasonic Vibration Uniaxial Tensile Load Xueli Cheng1, a, Changliu Tian2,b 12Henan Mechanical and Electrical Engineering College, Xinxiang, 453002, China achengxueli2005@126.com, btianchangliu@126.com Keywords: crack extension; ultrasonic vibration; uniaxial tension; fatigue loading.
As a result, in the process of the design and verification of these components, we must know the mechanical properties of component materials in such a case, including the properties of crack extension [1].
The specimen, in order to study the material's crack extension properties, is designed that the both ends are square board, the middle is index profile, and single side opened a gap, it is easy to crack up and extension positioning tracking of the crack, as is shown in Fig. 2.
Study on the Crack Extension Properties under Ultrasonic Vibration Uniaxial Tensile Load The Crack Extension Mechanism.
References [1] Jun Qin, in: Study on mechanical property of 20# steel under ultrasonic vibration simple tension, [Master's degree thesis ], Henan：Henan Polytechnic University, (2005), In Chinese

Die Design Tensile properties of die castings are largely affected by the presence of processing defects as well as variations in the average microstructure [1,2].
The two most important issues that are shown to affect the tensile properties of the castings are: design of filling systems such as sprue, runner, in-gates, filters and selecting the die.
Several reference dies are described in literature for casting standard and non-standard specimens to characterize mechanical properties.
Wekesa, Effect of runner design on mechanical properties of permanent mould aluminium castings, Inter.
Zhu, Improvement in Mechanical Properties of A356 Tensile Test Bars Cast in a Permanent Mold by Application of a Knife Ingate, Metall.

In order to improve mechanical properties of hydroxyapatite it is doped with magnesium.
A category of bioceramics have good mechanical properties but do not interact with environment which means they are inert.
In order to improve mechanical properties of interest: mechanical strength, hardness, tenacity, wear resistance and some thermal properties, hydroxyapatite is used in combination with ceramic oxides or metals in dispersion.
One of the techniques to improve HA properties is doping it with small amounts of ions greatly affecting mechanical properties of final product, although they are in small amounts (1-5%).
Each of these chemical elements brings advantages and disadvantages to mechanical properties [4].

Result and Discussion Materials properties result.。
The decrement in mechanical properties of concrete containing PET aggregate was related to low adhesive strength between PET aggregate surface and the cement.
Furthermore, the density of materials play a major role on mechanical properties of concrete, Therefore, the declination of the mechanical properties also can be extended to the low density of PET aggregate compare to the conventional fine aggregate [3]-[7].
The factors attributed to the reduction of shear force at the ultimate failure have been previously discussed.
Furthermore, the low adhesive strength between PET aggregate and concrete paste reduce the ability of interlocking between the aggregate that affecting the interface friction in resisting shear stresses.

The ratio of the thickness of the layers [1], the pressure in the deformation zone [2], the preparation of the surfaces [1, 3] and a number of other technological factors affect the value of the required deformation of the grasping during cladding.
In addition to the high adhesion strength of the layers, a number of requirements are imposed on the bimetallic strips of brass-steel-brass in terms of dimensional accuracy, mechanical properties and microstructure [16].
The relative reduction during cladding affects the bonding strength of bimetal layers, the nature of the microstructure, the size of the recrystallized grains, the mechanical properties of the strip, the dimensional accuracy [4].
To create the necessary exhaust properties of bimetallic strips, the optimum degree of deformation is in the range 0.45…0.60.
The factors were varied in the range T0 = 550...900°C, HpH = 2.0...4.0.

Factors Influencing the Suitability of Thermal Methods for Stress Analysis of NiTi Shape Memory Alloys J.
The material assumptions made to facilitate Thermoelastic Stress Analysis (TSA) are linear elasticity, material homogeneity and isotropy, and mechanical properties that are independent of temperature.
The unusual shape memory and superelastic properties of near equiatomic NiTi alloys complicate the application of any experimental stress analysis technique, and in the case of TSA, make these assumptions invalid.
This paper describes a detailed analysis conducted to characterise the material properties of NiTi shape memory alloys and to identify loading conditions suitable for quantitative stress analysis using TSA.
Obtaining functional thermoelastic measurements from Region 3 is made difficult by two main factors.

Effect of substrate bias voltage on the mechanical and tribological properties of low concentration Ti-containing diamond like carbon films Jinfeng Cui1,a, Li Qiang1,2,b, Bin Zhang2,c, Xiao Ling1,2,d, Junyan Zhang2,e* 1 School of Petroleum Chemical Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China 2 State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China acuijf@lut.cn, bqiangli1413@163.com, cbzhang@licp.cas.cn, dlingxiao014226@163.com, ezhangjunyan@licp.cas.cn Keywords: Diamond-like carbon film; Low concentration Ti doping; Substrate bias voltage; Mechanical properties; Tribological properties Abstract.
Moreover, other ion bombardment (such as re-sputtering, etching and so on) can seriously influence the properties of the film [12-13].
Hence, the bias was used to control the ion bombardment energy in order to modify the mechanical and tribological properties of the films.
The effect of substrate bias voltage on the mechanical and tribological properties of films was investigated systematically.
As a matter of fact, there is another factor to be considered.

Preparation and Friction Feature of TiAl-based Wear-resisting Self-lubricating Composite Haoran Geng 1,a, Min Wang 2,b，He Wang 1,a, Hua Guo 1,a 1 School of Materials Science and Engineering，University of Jinan,Jinan,Shandong Province,P.R.China 2 Industrial Group of Shandong University, Shandong University, Jinan,Shandong Province,P.R.China Key words: TiAl alloy; high temperature self-lubricating; mechanical properties; friction and wear.
On the other hand, Ti and Al in the matrix as well as the proportion of additives are of key factors for design of composition.
For mixing up of CaF2 and BaF2, the key factor lies on the ratio of these two materials.
(a ) 5%CaF2+BaF2 (b) 10% CaF2+BaF2 Fig.2 Microstructure of TAS material with different CaF2+BaF2 The results showed TAS material has good mechanical properties, experimental analysis related to the mechanical properties of this material will be discussed in another paper.
(2) CaF2+BaF2 lubricant can combine with matrix of TAS material well, and won’t affect formation of TiAl compound basically.