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Online since: June 2025
Authors: Wasawat Nakkiew, Adirek Baisukhan, Nuttachat Wisittipanit, Piyanuch Siriwat
However, such method can introduce drawbacks such as solidification cracking, distortion, and the formation of a heat-affected zone (HAZ) with altered properties [1].
FSW offers several advantages over the traditional welding method including superior mechanical properties, reduced distortion and minimal HAZ [3].
Recent research [4] has studied the relationship between various factors affecting the axial force in Friction Stir Welding (FSW).
The experimental results demonstrated that the optimal welding parameters that yield the highest mechanical properties were that the rotational speed and welding speed values equal 1750 RPM and 900 mm/min, respectively.
The mechanical properties results of FSW with a pre-heat temperature.
Online since: June 2015
Authors: K. Palanikumar, Jeswin Arputhabalan
Processing Techniques The processing techniques and process parameters are other important factors that significantly affect the properties and characteristics of biocomposites.
Fiber loading is a major factor that affects the strength and stiffness of the natural fiber polymer composites.
Processing technique and fibre orientation angle affecting the mechanical properties of E-glass reinforced wood/PVC composites.
Process related mechanical properties of press molded natural fiber reinforced polymers.
Effect of processing variables on the mechanical properties of sisal fibre reinforced polypropylene composites.
Online since: October 2007
Authors: Sreeramamurthy Ankem, P. Gregory Oberson
Titanium alloys have a number of properties that make them desirable for many applications.
The factors that affect twinning during low temperature creep will be discussed, including grain size, phase stability, and the presence of interstitial impurity elements.
Among the factors that affect twinning during low temperature creep of α-Ti is the grain size of the alloy.
This suggests that β-phase stability significantly affects the creep properties of the two-phase α−β Ti alloy.
It has been found that a number of factors affect twinning during low temperature creep.
Online since: February 2019
Authors: Guo Qing Jing, Valerii I. Kondrashchenko, Chuang Wang
However, there are great differences between physical and mechanical properties of composite sleeper that produced all over the world, which lead to the problem of searching rational parameters for composite sleeper.
The optimization problem for finding the optimum properties of the composite sleepers material is solved by the method of experimental statistical modeling (ESM-method) by carrying out a computational experiment on mathematical models of the properties (response functions) Y in RBSRR system from the variable factors X.
As variable factors X, the following indicators were adopted, related to the properties of the sleeper material: Х1 - bending coefficient of a sleeper, rel. units; Х2 - its mass, kg; Х3 - modulus of elasticity of a sleeper in a horizontal plane, MN/cm2; Х4 - the same in vertical, MN/cm2; Х5 - the same with respect to torsion of a rail, MN/rad; Х6 - rigidity of a fastener binding unit, MN/cm.
The levels of variation of factors X were determined on the basis of the operational experience of the railway tracks of Russia.
When minimizing the objective function (1), the weighting factors ai varied within the range of 0,05-0,20.
Online since: May 2006
Authors: José Neves, Altino Loureiro, Dulce Maria Esteves Rodrigues, Pedro Teixeira
The degradation in toughness is definitely brought about by the CGHAZs of the welds, the size and distribution of these zones being relevant factors in the weld performance.
The intrinsic mechanical properties of these regions are determined by the microstructure, which is function of the induced thermal cycles and of the chemical composition of the parent material and of the electrodes [3-4].
Chemical composition and mechanical properties of the parent material and weld metal are indicated in Table 1.
Table 1 - Chemical composition and mechanical properties of the PM and WM.
The degradation in toughness is definitely originated by the CGHAZs of the welds, the microstructure and size of theses zones being relevant factors of the weld performance.
Online since: December 2010
Authors: Hao Sheng Gu, Yoshito Itoh
Then mechanical properties of aged rubber specimens are measured and compared.
Basic mechanical properties such as modulus, tensile strength and elongation at break, etc. can be determined from these curves.
Ultraviolet can change NR properties apparently.
(a) Thermal oxidation test (b) Ozone test (c) Low-Temperature ozone Test (d) Ultraviolet radiation test (e) Salt water cycle test (f) Acid rain cycle test Fig.7 Property changes of NR in accelerated exposure tests The test results reveal that thermal oxidation affects NR properties much more dramatically than other factors such as ozone, ozone in low temperature, salt water and acid rain.
Ultraviolet irradiation also affects NR properties, and it also produces cracks on the surface of NR.
Online since: January 2021
Authors: Sami Kahla, Ahmed Kellai, Said Dehimi, Badreddine Babes
This allows us to say that thermal spraying did not cause a great change in the intrinsic mechanical properties of the ductile iron substrate.
Improves mechanical properties in particular ductility during tensile test.
Minak, Comparison of mechanical properties in compacted and spheroidal graphite irons, Tribol.
Walson, Aluminum-alloyed cast iron, properties and design, Trans.
Tchorz, Mechanical and Tribological Properties of HVOF-Sprayed (Cr3C2-NiCr+Ni) Composite Coating on Ductile Cast Iron, J.
Online since: October 2014
Authors: Radim Smolka, Petr Kacálek, Tomáš Petříček
Single-layer mechanical fastening waterproofing systems Tomáš Petříček1, a *, Petr Kacálek 2,b, Radim Smolka 3,c 1,2,3 Brno University of Technology, Faculty of Civil Engineering, Institute of Building Structures, Veveří 95, 602 00 Brno, Czech Republic apetricek.t@fce.vutbr.cz, bkacalek.p@fce.vutbr.cz, csmolka.r@fce.vutbr.cz Keywords: Flat roof, single-layer waterproofing, bitumen sheet, mechanical fastening system.
Single-layer mechanical fastening waterproofing systems are often used within the compositions of flat roofs.
There are some key factors which all of the one-layer mechanically fastening systems should meet, especially water-resistance and resistance against the suction of wind.
On the other hand if the anchors are too far away from the edge of the foil (or sheet) the watertightness of the joint may be affected.
Experimental measurements Properties of the joints of the mechanically fastened waterproofing layers can be tested on sample segments of the roofing exposed to defined stress in a pressure chamber.
Online since: January 2016
Authors: Petr Dymáček, Libor Válka, Denisa Bártková, Jiří Langer
Mechanical properties (yield strength, ultimate strength) were evaluated from SPT and correlated with results of uniaxial tensile tests (UTT).
Conclusions Mechanical properties of chosen Mg alloys and composites were determined based on SPT and compared with UTT.
In case of Fy normalization factors exhibited greater variance.
Betegón, Mechanical properties characterization of heat-affected zone using the small punch test, Weld.
Szpunar, Comparison of mechanical properties in conventional and small punch tests of fractured anisotropic A350 alloy forging flange. 
Online since: November 2022
Authors: Triyono Triyono, Poppy Puspitasari, Jamasri Jamasri, Hendrato Hendrato
Mechanical Properties and Microstructure Evolution of Double-Sided Friction Stir Welding AA6061-T6 Hendrato1,a*, Jamasri1,b, Triyono2,c and Poppy Puspitasari,3,d 1Department of Mechanical and Industrial Engineering, Gadjah Mada University, Indonesia 2Department of Mechanical Engineering, Sebelas Maret University, Indonesia 3Department of Mechanical Engineering, State University of Malang, Indonesia ahendrato@mail.ugm.ac.id, bjamasri@ugm.ac.id, cTriyonomesin@uns.ac.id, dpoppy@um.ac.id Keywords: Double-side FSW, Rotational Speed, Mechanical Properties, Microstructure Abstract.
Porosity defects in welded joints can reduce toughness, fatigue, and ductility and cause changes in the microstructure that result in changes in the mechanical properties of the weld [7].
Thick plate FSW using an effective tool significantly affects the weld mechanical properties, grain size, and defect compared to thin plate FSW [11], [12].
Several studies have reported the relationship between welding parameters, mechanical properties and microstructure of double-sided FSW.
Mechanical properties tests The mechanical properties of the double-sided FSW were assessed using hardness measurements and tensile tests.
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