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Online since: November 2011
Authors: E.K. Ioakeimidis
The corrosion influence of 3,5% NaCl – water solution on mechanical, magnetical and micro-failure behavior of ARMCO steel E.
Recently, Barkhausen noise (BHN) measurements allowed for the correlation of mechanical and magnetic properties [10, 11].
Seawater is still a chemical complex system affected by various factors such as concentration and access of dissolved oxygen, salinity, biological activity e.c.t.
Mechanical tensile experiments were performed on a justron type machine with a deformation rate of 0,2mm/min.
This was demonstrated by three modes of influences: Influence on the mechanical, magnetical and microfailure behavior of the metal.
Online since: August 2014
Authors: Li Feng Fan, Jian Bin Yun, Jia Xin Yan
But, air bending is influenced by a combination of various process parameters, such as the tool shape and dimension, the temperature change and frictional contact condition, the material properties, and so on.
In analysis process of forming, one of the most important factors is the calculation of springback.
Sensitivity analysis of technical parameters As a complex process, there are a large number of factors that affect the quality of the products in the air bending of JCO forming.
The regression mathematical model for quality evaluation index and influencing factors is established.
(2) The punch displacement h and die span L are key factors that influence the quality of products.
Online since: October 2012
Authors: Lian Jie Ma, Ai Bing Yu, Ya Dong Gong
Introduction Machinable ceramics have many excellent properties, such as small density, wear resistant, corrosion resistant, and it can be machined to mechanical workpieces of complicated shape.
In glass ceramics machining, the key problem is investigation cutting factors and the influence law.
The affecting law of materials removal rate was studied while cutting conditions changed, such as cutting speed vc, cutting depth ap and feed speed νf.
The number of factors n=3, experiment times m=15, when α=0.05, and Q=0.93411, U=28.7728, Lyy=U+Q=29.6569, thus From F distribution table, find critical value Fα: F0.05(3,11),.
In turning glass ceramics, the materials removal influence factors of cutting speed, cutting depth and feed speed were study
Online since: February 2014
Authors: G. Dinesh Babu, Nageswara Rao Muktinutalapati
Studies on effect of T6I4 and T6I6 type treatments on the mechanical properties of 354 are not available in published literature.
The effect of carrying out artificial aging at two different temperatures (in two steps) on the mechanical properties obtained has not been studied on 354 alloy.
The specified mechanical properties for the T61 condition are shown in Table 2.
Mechanical properties obtained after the two step artificial aging – 100 °C and 170 °C – are shown in Table 5.
It is considered that reinforcement between the two steps of aging is necessary to achieve an improved combination of mechanical properties.
Online since: September 2011
Authors: R. Ebner, Thomas Antretter, Werner Ecker, Peter Raninger, M. Leindl
The crack growth rate and the length at which the cracks stop growing are also influenced by the thermo-physical and mechanical properties of the die material.
The factor 10 results from meshing considerations. 3.3 Crack deflection.
Still, the cracks will arrange dependent on the sequence of initiation which largely affects the propagation rates of the cracks in the system and can cause a buffering effect.
Effect of material properties on the thermo-mechanical loading and damage of pressure casting dies – a numerical study.
In Tool Steels – Deciding Factor in Worldwide Production.
Online since: March 2023
Authors: I Made Londen Batan, Arif Wahjudi, Agus Sigit Pramono, Niko Adrisenna Pontjonoto, Mulyadi Mulyadi
The process of calculating heat generation rate and simulation using the Taguchi method has 4 factors, each of which has 4 levels.
The factors used in this study are tool rotation speed, welding speed, concave shoulder angle, and tool tilt angle with temperature response. on the weld joint.
Based on the research that has been done, changes in the FSW process parameters greatly affect the occurrence of defects and the mechanical strength of the welding process [4, 5].
[4] Yoo, J.T., Yoon, J.H., Min, K.J., & Lee, H.S.: Effect of Friction Stir Welding Process Parameters on Mechanical Properties and Macro Structure of Al-Li alloy.
[5] Zhou, Z., Yue, Y., Ji, S., Li, Z., & Zhang, L.: Effect of rotating speed on joint morphology and lap shear properties of stationary shoulder friction stir lap welded 6061-T6 aluminum alloy.
Online since: October 2010
Authors: G.H. Li, Guang Yu Tan, Can Liu, J.Q. Wu, W.F. Zheng
Zhen-hai Long, etc. [3] took a high-speed milling test of 2Cr13 martensitic stainless steel (30HRC) with milling parameters of three factors and two levels, found depth of cut and feed per tooth rather significantly affecting force, and it is nonlinear relationship between force and speed.
SDC-C4F Dynamometer Fig.1 Force-Measuring System Milling speed, feed and axial depth of cut were taken as three factors affecting forces, orthogonal test was adopted for mapping overall milling condition with less times of test,orthogonal table of L25(56) with 5 levels was choosed, there are all 6 columns in this table, the 1-3 column was used as speed, feed and axial depth of cut respectively, no.4 column was used as error, other columns were blank.
From above analyses, it is known that the contribution of error to force signal is small, i.e., the measured signal can reflect the real properties of milling force.
Fig.3 Variation Tendency of Index Following Factors Acknowledgments The authors acknowledge the National Natural Science Foundation (50975053) for supports.
Wang: Chinese Journal of Mechanical Engineering Vol.42 (2006), p.30-34
Online since: April 2009
Authors: Yvan Houbaert, Rafael Colás, Martha Patrizia Guerrero-Mata, Patricia del C. Zambrano, Maribel de la Garza, Mayra Moreno
Abstract: Galvannealed coatings are obtained by heat treating galvanized steel strips and are widely used in the automotive industry due to their improved properties.
The mechanical properties of the steel substrate were evaluated, and the morphology and Fe content in the various phases of the coating and its characteristics were analyzed and compared.
Mechanical properties and weldability of HSLA steels are comparable or superior to those of traditional carbon steels [2-4].
The mechanical properties of the coated and uncoated steel were evaluated from specimens machined at 0º, 45º y 90º to the rolling direction according to ASTM E8 standard.
The temperature of the post-dipping furnace affects the Fe content in the Fe-Zn phases.
Online since: August 2007
Authors: Hyung Kyu Kim, Young Ho Lee
A Study on the Fretting Wear Resistance of a Zirconium Alloy with the Variation of Supporting Spring Properties Young-Ho Leea and Hyung-Kyu Kim b Korea Atomic Energy Research Institute 150 Dukjin-dong, Yuseong-gu, Daejeon, 305-353, Republic of Korea a leeyh@kaeri.re.kr, bhkkim1@kaeri.re.kr Keywords: Fretting wear, Zirconium alloy, spring shape, slip amplitude, mechanism, spacer grid, nuclear fuel rod.
From the experimental results, the fretting wear mechanisms and the effect of spring properties were discussed.
This is because its mechanism is quite complex and the many variables affecting the fretting wear phenomenon has a mutual relationship with each other.
However, this causes a change of the mechanical properties that affects the fretting wear behavior.
An accumulation of wear particles in the dry condition has beneficial effects on the wear properties due to the formation of a load-bearing layer [5] while the wear debris is rapidly removed from the contact surfaces in concurrence with it's generation under a water lubrication.
Online since: May 2013
Authors: An Cui, Li Juan Xu, Qiang Yang
The combination of concave model cavity shape, rivet size and sheet metals has been proved to be one of the key factors affecting riveting molding.
The orthogonal experiment table with 3 factors and 5 levels is designed in order to gain matching scheme of rivet and sheets, including 50 groups of experiments.
Rivet, top sheet and bottom sheet are taken as experiment factors.
The traditional method of inspecting joint quality is to measure joint mechanical properties through experiments.
In conclusion,punch velocity is one of the important factors which affect the joint quality of SPR of half-hollow rivets.
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