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Online since: September 2011
Authors: Yu Can Fu, Hou Jun Qi, Jiu Hua Xu, Wen Guo Huo
The results show that surface quality maintain better level during a long period, the grinding affected zone was small(≤15μm), zirconia alumina belt has excellent performance than SiC belt during dry grinding Ti6Al4V alloy.
Introduction Titanium alloys are known as difficult-to-machine materials, especially at dry machining, due to their several inherent properties[1-3].
During grinding using abrasive wheels, which has been one of the most popular processes for titanium alloys, short wheel life and severe surface burn of ground workpiece are the most important among the factors impairing their grindability.
Cross-section micro texture images of grinding surface are shown in Fig.4a, about 15μm heat affected zone can be observed on the cross-section of ground surface, no distinctly structure change on the plane-section of ground surface, in Fig.7b.
Wallbank: Proceedings of the Institution of Mechanical Engineers Vol.204, (1990), p.53 [8] D.A.
Introduction Titanium alloys are known as difficult-to-machine materials, especially at dry machining, due to their several inherent properties[1-3].
During grinding using abrasive wheels, which has been one of the most popular processes for titanium alloys, short wheel life and severe surface burn of ground workpiece are the most important among the factors impairing their grindability.
Cross-section micro texture images of grinding surface are shown in Fig.4a, about 15μm heat affected zone can be observed on the cross-section of ground surface, no distinctly structure change on the plane-section of ground surface, in Fig.7b.
Wallbank: Proceedings of the Institution of Mechanical Engineers Vol.204, (1990), p.53 [8] D.A.
Online since: August 2018
Authors: Wen Zhong Lu, Chen Hui Li, Meng Meng Hao, Gui Fen Fan, Hao Yuan Deng, Kai Wang, Yu Sheng Shi
The loss may be due to the interplay of various factors.
And the influence of single factor is easily overlapped by other factors.
Recently, many scholars conducted a series of experiments to deduce original correlations between electrical breakdown strength and mechanical or tribological properties [12,13,14].
Das, Effect of powder, chemistry and morphology on the dielectric properties of liquid-phase-sinted alumina.
Jiang, Microstructure and mechanical properties of porous alumina ceramic prepared by a combination of 3–D printing and sintering, Ceram.
And the influence of single factor is easily overlapped by other factors.
Recently, many scholars conducted a series of experiments to deduce original correlations between electrical breakdown strength and mechanical or tribological properties [12,13,14].
Das, Effect of powder, chemistry and morphology on the dielectric properties of liquid-phase-sinted alumina.
Jiang, Microstructure and mechanical properties of porous alumina ceramic prepared by a combination of 3–D printing and sintering, Ceram.
Online since: March 2013
Authors: Wen Ping Liu, Yu Ming Han, Jie Jin
In the paper, a mechanical analysis for a piling machine column is conducted, based on the virtual prototype proposed in a previous portion of our research work in this area.
Literature review shows that little research effort has been reported for the mechanical properties of composite pile frame [5].
The variable h affects the contact area between the column and tension diagonal.
In addition, other factors required by manufacturability may affect the column strength.
Taking air holes and other factors that may affect the column strength into consideration, the authors conducted a further check for strength adequacy of the detailed column.
Literature review shows that little research effort has been reported for the mechanical properties of composite pile frame [5].
The variable h affects the contact area between the column and tension diagonal.
In addition, other factors required by manufacturability may affect the column strength.
Taking air holes and other factors that may affect the column strength into consideration, the authors conducted a further check for strength adequacy of the detailed column.
Online since: August 2013
Authors: Song Lin Ding, John Mo, Mohammad Zulafif Rahim
Due to its superior properties, this material has been widely used for cutting tool.
Since no clear trend observed for EDLed PCD, the Heat Affected Zone for PCD was predicted to only appear for few micron meter depth.
Further than that, variability of cobalt composition at the grain boundary would also affect to uneven temperature distribution.
This stress relaxation may happen due to several factors including surface crack generation and reduction of coefficient of thermal expansion mismatch between elements in PCD.
Pisarciuc, "Structure, Material Properties and Applications of Diamond-like Materials " Nonconventional Technologies Review pp. 13-18, 2012
Since no clear trend observed for EDLed PCD, the Heat Affected Zone for PCD was predicted to only appear for few micron meter depth.
Further than that, variability of cobalt composition at the grain boundary would also affect to uneven temperature distribution.
This stress relaxation may happen due to several factors including surface crack generation and reduction of coefficient of thermal expansion mismatch between elements in PCD.
Pisarciuc, "Structure, Material Properties and Applications of Diamond-like Materials " Nonconventional Technologies Review pp. 13-18, 2012
Online since: August 2007
Authors: Jae Chul Lee, Doo Man Chun, Hyung Jung Kim, Sung Hoon Ahn
The search page uses keywords, ranges of material properties and material
classification as search conditions.
In the graph, each axis represents one material property and the ellipse or ball represents the range of two or three material properties in the same material group.
The lines in 2D graph and the plane in 3D graph represent performance indexes with two or three material properties.
Some CAD programs support the material information, but they simply provide limited material properties.
In addition, ranking of selected materials with material properties using the user-defined weight factors is one of methods for material selection.
In the graph, each axis represents one material property and the ellipse or ball represents the range of two or three material properties in the same material group.
The lines in 2D graph and the plane in 3D graph represent performance indexes with two or three material properties.
Some CAD programs support the material information, but they simply provide limited material properties.
In addition, ranking of selected materials with material properties using the user-defined weight factors is one of methods for material selection.
Online since: February 2014
Authors: Xiao Ming Wang, Wen Bin Li, Zhao Jun Zhang
Based on this assumption, the Truss Model [8], the Lattice Model [9] and the continuous finite element model [6,10] et al. were proposed to analyze the properties of concrete material.
This model is able to well describe the mechanical properties of brittle materials such as ceramic, glass, rock, et al.
It is frequently thought that material’s strength and density are two of the significant influencing factors on the resistance to impact.
To save the computer’s memory and calculating time, only the zone which significantly affects the perforation process was mesoscale modeled.
Lopatin:High strain rate properties and constitutive modelling of glass.1995),p.
This model is able to well describe the mechanical properties of brittle materials such as ceramic, glass, rock, et al.
It is frequently thought that material’s strength and density are two of the significant influencing factors on the resistance to impact.
To save the computer’s memory and calculating time, only the zone which significantly affects the perforation process was mesoscale modeled.
Lopatin:High strain rate properties and constitutive modelling of glass.1995),p.
Online since: January 2012
Authors: Thomas Niendorf, Hans J. Maier, Peter Klimala, Andreas Frehn
A thorough experimental approach including mechanical testing and microstructural characterization was employed to shed light on the microstructure-mechanical properties-relationships in order to deepen the understanding of the critical damage mechanisms.
For calculation of the fatigue notch factors in Fig. 5b, the R20 samples were treated as un-notched.
In case of the R20 samples, the TWIP steel with 40 % of pre-deformation shows superior properties independent of the orientation of the samples.
The TWIP steel pre-strained to 40 % in general follows the same trend, showing even higher factors for the sharp notches.
In case of loading in the HCF regime superior properties are obtained upon highest pre-strain levels.
For calculation of the fatigue notch factors in Fig. 5b, the R20 samples were treated as un-notched.
In case of the R20 samples, the TWIP steel with 40 % of pre-deformation shows superior properties independent of the orientation of the samples.
The TWIP steel pre-strained to 40 % in general follows the same trend, showing even higher factors for the sharp notches.
In case of loading in the HCF regime superior properties are obtained upon highest pre-strain levels.
Micro Mechanical Behaviors and Damage in Nickel Base Alloy and Steels during Very High Cycle Fatigue
Online since: December 2016
Authors: Guo Cai Chai
The crystallographic properties, Schmid factors and orientations of grain and boundaries have very important roles to the fatigue damage.
Table 1 shows their nominal chemical compositions and mechanical properties.
Results and discussion Fatigue properties and fatigue crack initiation.
Schmid factors.
The influence of grain or twin boundary on fatigue damage strongly depends on the crystallographic properties and Schmid factor of grain and its orientations.
Table 1 shows their nominal chemical compositions and mechanical properties.
Results and discussion Fatigue properties and fatigue crack initiation.
Schmid factors.
The influence of grain or twin boundary on fatigue damage strongly depends on the crystallographic properties and Schmid factor of grain and its orientations.
Online since: August 2015
Authors: Stanisław Pysz, Robert Żuczek
Zakopiańska 73, 30-418 Kraków, Poland
* stanislaw.pysz@iod.krakow.pl, **robert.zuczek@iod.krakow.pl
Key words: computer-aided designs of foundry processes, rapid prototyping, numerical simulations, mechanical properties, prototype castings.
This technology assumes that the properties of such a casting are similar to properties of a casting obtained in serial production involving die-casting technologies or high-pressure die casting.
It was stated that the final properties of a prototype casting and a serial casting may be different, which may affect the assessment of the construction under development.
The assumption of standard safety factors of a construction do not always bring the required effects, leading to an over-scaled element, thus to an increase in its mass.
It has a significant impact on properties.
This technology assumes that the properties of such a casting are similar to properties of a casting obtained in serial production involving die-casting technologies or high-pressure die casting.
It was stated that the final properties of a prototype casting and a serial casting may be different, which may affect the assessment of the construction under development.
The assumption of standard safety factors of a construction do not always bring the required effects, leading to an over-scaled element, thus to an increase in its mass.
It has a significant impact on properties.
Online since: February 2011
Authors: Jean-Jacques Fundenberger, Thierry Grosdidier, Albert Tidu, Bernard Bolle, Nathalie Allain-Bonasso, J.X. Zou, J.D. Puerta Velásquez, P. Chevrier
This is however an important issue because the presence of residual stresses in components has long been recognized as a major factor affecting end-use properties.
Special attention has been dedicated to the difficult case of Titanium alloys [1-5]: despite high mechanical properties / density balance and excellent corrosion resistance, these alloys suffer from a poor machinability.
As a result, improvements can be obtained in terms of corrosion [19-24] and wear [23-25] properties.
Comparatively, the sub-surface hardening - which is obtained far below the heat-affected zone - is “mechanical” in nature.
This is illustrated in this article through analysis of the TA64 Ti alloy and steels while their effect on the properties is discussed.
Special attention has been dedicated to the difficult case of Titanium alloys [1-5]: despite high mechanical properties / density balance and excellent corrosion resistance, these alloys suffer from a poor machinability.
As a result, improvements can be obtained in terms of corrosion [19-24] and wear [23-25] properties.
Comparatively, the sub-surface hardening - which is obtained far below the heat-affected zone - is “mechanical” in nature.
This is illustrated in this article through analysis of the TA64 Ti alloy and steels while their effect on the properties is discussed.