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Online since: January 2012
Authors: Jian Zhong Li, Li Chun Zhuo, Xi Ni
Mechanical properties of cemented reticulate red clay were studied in present research.
Test results show that: (1) shear strength of cemented reticulate red clay increase exponentially as the increasing of cement content; (2) shear strength of cemented reticulate red clay decrease polynomially as the increasing of water content; (3) mechanical properties of cemented reticulate red clay affected significantly by curing time and curing confined pressure.
Cemented reticulate red clay was used in geotechnical engineering in recent years [9], while, many aspects of mechanical properties of cemented reticulate red clay remain unknown.
After cured for a certain amount of time under a designed cuing condition, the mechanical properties of the cemented reticulate red clay were tested.
Xi: Experimental study of the physical and mechanical properties of Cement Reticulate Red Clay, Master's Thesis, Central South University (2011) (in Chinese)
Test results show that: (1) shear strength of cemented reticulate red clay increase exponentially as the increasing of cement content; (2) shear strength of cemented reticulate red clay decrease polynomially as the increasing of water content; (3) mechanical properties of cemented reticulate red clay affected significantly by curing time and curing confined pressure.
Cemented reticulate red clay was used in geotechnical engineering in recent years [9], while, many aspects of mechanical properties of cemented reticulate red clay remain unknown.
After cured for a certain amount of time under a designed cuing condition, the mechanical properties of the cemented reticulate red clay were tested.
Xi: Experimental study of the physical and mechanical properties of Cement Reticulate Red Clay, Master's Thesis, Central South University (2011) (in Chinese)
Online since: January 2010
Authors: T. Wegrzyn, J. Miroslawski, D.G. Pinto, M. Miros, Abílio P. Silva
Safety and exploitation conditions of welded steel structure depend on many
factors.
Introduction Safety and exploitation conditions of steel welds of car body depend on many factors [1-4].
However there is a different influence of those elements on mechanical properties of welds.
To assess the effect of nickel, molybdenum and manganese presence on mechanical properties of deposited metals basic electrodes prepared in laboratory environment were used.
Wegrzyn: The Influence of the Main Factors on the Impact Toughness Properties of Low Carbon Steel Welds, Proceedings of ISOPE'97, Honolulu, USA (1997) [8] T.
Introduction Safety and exploitation conditions of steel welds of car body depend on many factors [1-4].
However there is a different influence of those elements on mechanical properties of welds.
To assess the effect of nickel, molybdenum and manganese presence on mechanical properties of deposited metals basic electrodes prepared in laboratory environment were used.
Wegrzyn: The Influence of the Main Factors on the Impact Toughness Properties of Low Carbon Steel Welds, Proceedings of ISOPE'97, Honolulu, USA (1997) [8] T.
Online since: June 2014
Authors: Rustam Kaibyshev, Vladislav Kulitskiy, Damir Tagirov, Nikolay Belov
/fax: +7 4722 58-54-55; email address: tagirov@bsu.edu.ru
Keywords: aluminum alloys, LHIP, mechanical properties, fatigue, casting
Abstract.
The effect of liquid hot isostatic pressing (LHIP) on microstructure and mechanical properties of a high-strength cast Al-6Zn-2Mg-0.5Fe-0.7Ni alloy was examined.
Introduction Cast aluminum alloys normally have mechanical properties that are inferior to wrought products [1].
Mechanical properties.
However, the present material showed disappointed fatigue properties.
The effect of liquid hot isostatic pressing (LHIP) on microstructure and mechanical properties of a high-strength cast Al-6Zn-2Mg-0.5Fe-0.7Ni alloy was examined.
Introduction Cast aluminum alloys normally have mechanical properties that are inferior to wrought products [1].
Mechanical properties.
However, the present material showed disappointed fatigue properties.
Online since: June 2014
Authors: P. Marimuthu, N.E. Paul Edwin
Analysis of variance (ANOVA) was used for identifying the significant parameters affecting the responses.
1.
In actual practice, there are many factors which affect surface roughness and tool wear, such as cutting conditions, tool variables and work piece variables.
Cutting conditions include cutting speed, feed and depth of cut where as tool variables include tool material, nose radius, rake angle, cutting edge geometry, tool vibration, tool overhang, tool point angle etc. and work piece variable include material hardness and other mechanical properties [7].
These factors and three levels are given in Table 2.
The experimental results were analyzed with ANOVA which is used for identifying the factors which significantly affecting the performance measures.
In actual practice, there are many factors which affect surface roughness and tool wear, such as cutting conditions, tool variables and work piece variables.
Cutting conditions include cutting speed, feed and depth of cut where as tool variables include tool material, nose radius, rake angle, cutting edge geometry, tool vibration, tool overhang, tool point angle etc. and work piece variable include material hardness and other mechanical properties [7].
These factors and three levels are given in Table 2.
The experimental results were analyzed with ANOVA which is used for identifying the factors which significantly affecting the performance measures.
Online since: January 2013
Authors: Qin He Zhang, Pei Qi Wang, Wen Ping Liu, B. Zhang
The exploration of microstructure and mechanical behaviors during the plastic working of H-beams is of great significance for improving the product properties.
Since rolling parameters heavily affect the microstructure of H-beams, improved product properties of H-beams can be obtained by optimizing the rolling schedule.
For microstructure evolution during rolling, key affecting factors are strain rate, initial rough rolling temperature, time interval between passes, and other rolling parameters [6].
Specifically, the study focuses on the effect of the above factors on the evolution of austenite during the hot rolling process of H-beams.
This benefits the grain refinement process and leads to improved mechanical properties of H-beams
Since rolling parameters heavily affect the microstructure of H-beams, improved product properties of H-beams can be obtained by optimizing the rolling schedule.
For microstructure evolution during rolling, key affecting factors are strain rate, initial rough rolling temperature, time interval between passes, and other rolling parameters [6].
Specifically, the study focuses on the effect of the above factors on the evolution of austenite during the hot rolling process of H-beams.
This benefits the grain refinement process and leads to improved mechanical properties of H-beams
Online since: March 2015
Authors: Xiao Ping Zhou, Feng Xu, Ying Ze Fang, Li Kui Zhu
FSP function area formed a uniform density composite layer, of which internal coating layer formed superfine crystal structure and crystal structure of substrate changed, improved the mechanical properties.
The plastic deformation generated by friction stir processing directly influenced the microstructure and mechanical properties.
Defined plastic deformation variable F as a combination of four factors in the process of FSP, include stirring head rotation speed r, horizontal feed speed v, stirring passes n and vertical depth change ∆h.
F directly affected the change regularity of microstructure morphology and mechanical properties.
Detector characterization Cut the affected zone horizontal cross section in metallographic cutter, inlaid the metallographic specimen in XQ-2B inlaying machine, then mechanical grind, polished, chemical etched in 5% nitric acid alcohol liquor.
The plastic deformation generated by friction stir processing directly influenced the microstructure and mechanical properties.
Defined plastic deformation variable F as a combination of four factors in the process of FSP, include stirring head rotation speed r, horizontal feed speed v, stirring passes n and vertical depth change ∆h.
F directly affected the change regularity of microstructure morphology and mechanical properties.
Detector characterization Cut the affected zone horizontal cross section in metallographic cutter, inlaid the metallographic specimen in XQ-2B inlaying machine, then mechanical grind, polished, chemical etched in 5% nitric acid alcohol liquor.
Online since: July 2014
Authors: Feng Qin Wang, Shu Zhi Wang, Xiao Jiang, Fei Li, Zhi Min Zhang
Results of research showed that running speed of strip and finish rolling temperature were main factors affecting accuracy of coiling temperature.
Introduction Coiling temperature greatly affects microstructure, mechanical property, physical property and machinability of hot rolling strip [1-3].
Cold rolling products would inherit this inhomogeneous microstructure, causing mechanical property of products unqualified and product yield to decline.
In order to remove inhomogeneous microstructure and mechanical property between head/tail and middle part of strip, U-type cooling process is adopted.
Conclusions (1) Running speed of strip was one of the main factors affecting accuracy of coiling temperature.
Introduction Coiling temperature greatly affects microstructure, mechanical property, physical property and machinability of hot rolling strip [1-3].
Cold rolling products would inherit this inhomogeneous microstructure, causing mechanical property of products unqualified and product yield to decline.
In order to remove inhomogeneous microstructure and mechanical property between head/tail and middle part of strip, U-type cooling process is adopted.
Conclusions (1) Running speed of strip was one of the main factors affecting accuracy of coiling temperature.
Online since: March 2007
Authors: Ik Min Park, S.W. Lee, Kyung Mok Cho, Dae Hyun Song, Young Do Park, Y.H. Park
Microstructural study revealed that
morphology and distribution of non equilibrium Mg17Al12 phase is main factor determining the tensile
and creep properties of as cast Mg-xAl-Zn alloys.
Therefore the database of mechanical properties and castability of magnesium alloys is very important to developing the new magnesium alloys.
However, its application is limited to temperature below 120°C due to rapid degradation of mechanical properties, especially the creep resistance, due to the thermally unstable β phase (Mg17Al12) at elevated temperature [9~13].
In this present study, we investigated the effect of Al content on the microstructural characteristics and mechanical properties, such as tensile and creep properties, of Mg-xAl-Zn (AZx1) alloys Experimental procedures The chemical compositions of AZx1 alloys used in this study are shown in the table 1.
Microstructure study revealed that morphology and distribution of non equilibrium Mg17Al12 phase is main factor determining the tensile and creep properties of as cast Mg-xAl-Zn alloys.
Therefore the database of mechanical properties and castability of magnesium alloys is very important to developing the new magnesium alloys.
However, its application is limited to temperature below 120°C due to rapid degradation of mechanical properties, especially the creep resistance, due to the thermally unstable β phase (Mg17Al12) at elevated temperature [9~13].
In this present study, we investigated the effect of Al content on the microstructural characteristics and mechanical properties, such as tensile and creep properties, of Mg-xAl-Zn (AZx1) alloys Experimental procedures The chemical compositions of AZx1 alloys used in this study are shown in the table 1.
Microstructure study revealed that morphology and distribution of non equilibrium Mg17Al12 phase is main factor determining the tensile and creep properties of as cast Mg-xAl-Zn alloys.
Online since: March 2017
Authors: Alicia Mašlejová, Jaroslav Duška, Lucia Hrabčáková, Atila Drotár
Malfunction of ropes can be caused by several factors and may occur for several reasons.
This paper is aimed at the damage itself, but also a potential impact on the changes to the structure and possible changes of mechanical properties of ropes in the area struck by electric discharges.
Presence of the oxide particle 2 mm 865 – 883 HV Wire break in a light, heat-affected area 530 – 556 HV Fig. 7 The wire with increased hardness of the material in areas partially melted down, and a considerable overheating of the material Mechanical properties Tensile tests were performed on another fourteen undamaged wires in a strand without visible damaging.
Before the test, areas were marked on all wires, where five damaged wires excluded from the test were damaged by contact with the trolley, in order to ascertain whether the intact wires experienced any changes to their properties that would lead in this area to their preferable damage.
Analyses confirmed that the other wires from the strand damaged by contact with the trolley had not changed their microstructure and mechanical properties, i.e., they remained fully functional.
This paper is aimed at the damage itself, but also a potential impact on the changes to the structure and possible changes of mechanical properties of ropes in the area struck by electric discharges.
Presence of the oxide particle 2 mm 865 – 883 HV Wire break in a light, heat-affected area 530 – 556 HV Fig. 7 The wire with increased hardness of the material in areas partially melted down, and a considerable overheating of the material Mechanical properties Tensile tests were performed on another fourteen undamaged wires in a strand without visible damaging.
Before the test, areas were marked on all wires, where five damaged wires excluded from the test were damaged by contact with the trolley, in order to ascertain whether the intact wires experienced any changes to their properties that would lead in this area to their preferable damage.
Analyses confirmed that the other wires from the strand damaged by contact with the trolley had not changed their microstructure and mechanical properties, i.e., they remained fully functional.
Online since: October 2006
Authors: Akira Shimamoto, Taku Shimomura
(Isotropic properties).
Figure 9 shows the relationships between the dimensionless stress intensity factors and the loads for each crack angle when isotropic properties are used.
Figure 10 shows the relationships between the dimensionless stress intensity factors and the loads for each crack angle when anisotropic properties are used.
Anisotropic properties reach the FI value that is 35.7% higher than isotropic properties.
(Anisotropic properties).
Figure 9 shows the relationships between the dimensionless stress intensity factors and the loads for each crack angle when isotropic properties are used.
Figure 10 shows the relationships between the dimensionless stress intensity factors and the loads for each crack angle when anisotropic properties are used.
Anisotropic properties reach the FI value that is 35.7% higher than isotropic properties.
(Anisotropic properties).