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STRUCTURE AND MECHANICAL PROPERTIES OF 1.4539 AUSTENIC STEEL JOINTS MADE BY TIG AND LASER-BEAM WELDING Zdzisław BOGDANOWICZ1, a, Barbara NASIŁOWSKA1, b *, Paweł JÓŹWIK 2,c, and Dariusz ZASADA 2,d 1 Military University of Technology, Faculty of Mechanical Engineering, Kaliskiego 2, 00-908 Warsaw 2 Military University of Technology, Faculty of Advanced Technology and Chemistry, Kaliskiego 2, 00-908 Warsaw a zbogdanowicz@wat.edu.pl, b nasilowska.barbara@gmail.com, c pjozwik@wat.edu.pl, d dzasada@wat.edu.pl Keywords: 1.4539 austenitic steel, welding, laser, TIG, mechanical properties, fatigue Abstract.
This paper presents the analysis of structural research, micro-hardness and fatigue properties of the base material which is 1.4539 steel and joints made with CO2 laser beam and TIG method.
Despite quite wide range of usage, the publications about properties of this material are very limited [1-5].
Research of mechanical properties on welded joints The mechanical properties of 1.4539 austenitic stainless steel samples and TIG weld and laser weld were set on the INSTRON 8502 testing machine (Table 1) in accordance to PN-EN ISO 6892-1:2010.
  (3) Calculation range of elastic - plastic method for a predetermined number of cycles can be calculated from the formula: (4) where: - partial safety factors taking into account the uncertainty associated with the response to the load (-1.5 adopted by Lubinski [8]) and change the properties of the material within the joint.

The aggregation structure of raw silk which influences the mechanical properties of raw silk directly is not only determined by the properties of cocoon but also affected by silk reeling velocity.
The study showed that orientation degree, crystallinity and mechanical properties of raw silk were remarkably influenced by silk reeling velocity, and the mechanical properties of raw silk would be improved through the reasonable silk reeling velocity.
In addition, the properties of raw silk are determined by the structure of raw silk.
Then the sonic velocity and orientation factor were worked out
Varying the silk reeling velocity, there is not a change on the location of the peak, however, the peak area seems to be affected.

The influence of graphite to mechanical properties and absorbing electromagnetic wave properties of cement mortar were researched.
The results showed that graphite content had obvious effect on mechanical properties of mortar composite.
The effect of graphite content of composite for absorbing properties and mechanical properties was discussed.
Graphite content had significant influence on mechanical properties of mortar.
Graphite content was important factors that affected composites materials mechanical properties and absorbing properties.

Analysis on Affecting factors of Slab Surface Transversal Corner Crack for Medium-Carbon Steel with Boron in Continuous Casting Qichun Peng 1, a, Zhibo Tong 1, b and Danping Fan 1, c 1.
Introduction Our country is rich in boron resources, adding traces of boron to replace parts of valuable elements can obtain excellent mechanical properties.
data from April to September, 2011, to explore the influence factors on corner crack of medium-carbon steel with born A36-LB, among them, component analysis is the spectral data.
Summary Slab corner cracks is the result of various factors.
Formation and influencing factors of oscillation marks for continuous casting steel billet[J].

Nickel-based super alloy GH4169 has been widely used in aerospace industry because of its good mechanical properties under high temperature.
The results show that geometric parameter of cutting tool is one of the important factors affecting tool life.
The chemical composition and mechanical properties are shown in Table 1 and Table 2.
The effect level of different factors such as cutting condition on VB is obtained through orthogonal experiment.
Based on the range analysis for orthogonal design, Range:, the effect level of cutting factors on tool wear is shown as.

Four variables, water to cementitious material ratio (W/CM), sand ratio, cement replacement ratio, and the average particle size of clay-brick-powder were determined to analyze the affected factors on the properties of the concrete.
(3) W/CM is the most important factors affecting concrete strength.
Normally, the concrete properties reduced as the W/CM increased.
Standard for test method of mechanical properties on ordinary concrete
Mechanical Properties of Concrete with Recycled Clay-Brick-Powder.

On the other hand, however, on the nanometer scale, the electrical properties of materials are affected not only by the structure and composition of these materials, but also by the mechanical factors of stress and strain due to lattice vibrations.
Thus, it is a great needing to research the electrical properties of materials on nanometer scale.
As the result, the M-AFM can be used to measure the electrical properties of materials with a high operating speed.
Such difference can be corrected by the calibration process with a zero setting, therefore it will not affect the evaluation of electrical properties of materials.
The M-AFM can be used to measure the electrical properties of materials with a high operating speed.

With long-term exposure to air conditions, the problems such as falling off and many kinds of cracks caused by environmental factors often turned up on the external surface, which resulted in the directly exposing to air conditions and the aging phenomenon of polystyrene panel, furthermore, caused the reduction of the insulating properties.
Conclusions The mechanical properties of fine aggregate concrete made from wet-sieving ordinary concrete were studied by experiment.
The mechanical properties of recomposed concrete mixed by the residual concrete stayed on the sieve with the ordinary concrete were also experimented.
The results show that the mechanical properties of recomposed concrete are almost the same as that of ordinary concrete.
[3] GB/T 50081-2002: Standard for Test Methods of Mechanical Properties of Ordinary Concrete (China Building Industry Press, 2002)

All these factors lead to a slight improvement in mechanical properties.
Results and Discussion Influence of the finish temperature and rate of the accelerated cooling on the microstructure and mechanical properties.
Changes in microstructure did not result in a noticeable change of mechanical properties of both steels (Fig. 3c, d).
As result, mechanical properties deterioration is observed.
Liu, Microstructure and Mechanical Properties of a Low Carbon Bainitic Steel, steel research international 84 (2013) 352–361

Influence of Aging on Microstructure and Mechanical Properties of Wrought Magnesium Alloys Yong Xue 1, a, Zhimin Zhang 1, b, Lihui Lang 2, c, Hui Yang 1, d 1 North University of China, School of Material Science and Engineering, 030051 Taiyuan, China 2 Beihang University, School of Mechanical Engineering and Automation, 100191 Beijing, China amerryjukii@hotmail.com, bzhangzhimini@nuc.edu.cn, cforge54@163.com, dping8191@sohu.com Keywords: aging, microstructure, mechanical properties, AZ80 magnesium alloy, ZK60 magnesium alloy Abstract.
In the present paper a research has been made on the effect of aging on the microstructure and mechanical properties of AZ80 and ZK60 wrought magnesium alloys by virtue of optical microscope, electronic scanning microscope and mechanical testers.
In the present research, an attempt has been made to improve the strength and elongation, as well as the variety of mechanical properties of wrought magnesium alloys through solution aging approach.
Results and discussions Effect of aging temperature on mechanical properties of AZ80 & ZK60.
The joint effect of these factors account for the variation of ZK60 magnesium alloy in mechanical properties and microstructures as presented above.