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Online since: August 2011
Authors: Jin Xiang Wang, Rui Jin Zhao, Xiao Li Zhang
The quasi-static compressive mechanical properties of the composites with the reinforcement matrix mass fraction 10%, 15% and 20% respectively were researched recur to universal testing machine of Instron 3367 and self-consistent theory.
The results show that the mechanical properties obtained by self-consistent theory are well accord with the experimental results; compared with pure aluminum, the yield stress of the composites with metallic glass particles reinforcement of the mass fraction 20% enhances 46.8 percent; the main reinforcement mechanism is the amorphous particles can undertake higher loading, the combined quality of the reinforcement particles with the matrix and the distribute uniformity of the reinforcement particles are important factors which will affect the reinforcement effects.
The quasi-static compressive mechanical properties of the composites were researched recur to universal testing machine of Instron 3367 and self-consistent theory.
The quasi-static compressive mechanical properties of the specimens were tested recur to universal testing machine of Instron 3367.
Conclusions The quasi-static compressive mechanical properties of the composites fabricated by explosive compaction of the mixed amorphous particles and aluminum powders were researched by experiment and self-consistent theory.
The results show that the mechanical properties obtained by self-consistent theory are well accord with the experimental results; compared with pure aluminum, the yield stress of the composites with metallic glass particles reinforcement of the mass fraction 20% enhances 46.8 percent; the main reinforcement mechanism is the amorphous particles can undertake higher loading, the combined quality of the reinforcement particles with the matrix and the distribute uniformity of the reinforcement particles are important factors which will affect the reinforcement effects.
The quasi-static compressive mechanical properties of the composites were researched recur to universal testing machine of Instron 3367 and self-consistent theory.
The quasi-static compressive mechanical properties of the specimens were tested recur to universal testing machine of Instron 3367.
Conclusions The quasi-static compressive mechanical properties of the composites fabricated by explosive compaction of the mixed amorphous particles and aluminum powders were researched by experiment and self-consistent theory.
Online since: April 2012
Authors: Chuan Zhen Huang, Han Lian Liu, Jun Wang, Bin Zou, Yu Huan Fei, Hong Tao Zhu, Yan Zhao
The results show that the mechanical properties can be improved in a proper heating mode.
Some researchers have tried to make TiB2-composites to enhance the mechanical properties.
That’s the main reason that the comprehensive mechanical properties of S3 were improved.
The mechanical properties of TiB2-Ti(C0.5N0.5)-WC composite materials were shown in Table.2.
These features can improve the comprehensive mechanical properties of materials
Some researchers have tried to make TiB2-composites to enhance the mechanical properties.
That’s the main reason that the comprehensive mechanical properties of S3 were improved.
The mechanical properties of TiB2-Ti(C0.5N0.5)-WC composite materials were shown in Table.2.
These features can improve the comprehensive mechanical properties of materials
Online since: July 2014
Authors: Cong Qi Fang, Zhi Jie Yuan, Shuai Yang
The mechanical properties of corroded reinforced concrete under repeated load are investigated.
There are extensive experimental researches about mechanical properties of corroded reinforced concrete component and structure [1-5].
Only small numbers of the influence factors are considered in the experimental regression analysis, the human factors and corresponding limitations are also brought into the experiment.
In present paper, the mechanical properties of the corroded RC beam are studied.
Conclusion The mechanical properties of the corroded RC beam are researched by tests and the maximum crack width, mid-span deflection and reduction factor are predicted by using SVM method.
There are extensive experimental researches about mechanical properties of corroded reinforced concrete component and structure [1-5].
Only small numbers of the influence factors are considered in the experimental regression analysis, the human factors and corresponding limitations are also brought into the experiment.
In present paper, the mechanical properties of the corroded RC beam are studied.
Conclusion The mechanical properties of the corroded RC beam are researched by tests and the maximum crack width, mid-span deflection and reduction factor are predicted by using SVM method.
Online since: January 2010
Authors: Paulo Roberto Cetlin, Maria Teresa Paulino Aguilar, Elaine Carballo Siqueira Corrêa
This phenomenon is
associated with an internal distortion process that takes place in the bar as it flows through the die,
leading to the development of higher drawing forces and affecting the subsequent mechanical
behavior of the material.
This phenomenon, whose magnitude is affected by the die semi-angle α and the reduction of area per pass r [4,5], is associated with an internal distortion process that takes place in the bar as it flows through the die, leading to the development of higher drawing forces and affecting the subsequent mechanical behavior of the material [4,6].
Therefore, Table 2 presents the average effective strains εmv and the redundant deformation factors φv of the AISI 304 stainless steel drawn bars, whose values have been calculated employing the final effective strain distributions obtained through visioplasticity (figure 4) and the procedure formerly displayed in other experimental evaluation [13].
Table 2: Average deformation εm and redundant deformation factors φ obtained in the visioplasticity and the stress-strain superposition techniques.
The superposition technique reflects the hardening characteristics of the material and its final mechanical properties, whereas the visioplasticity results would not be influenced by the subsequent mechanical behavior of the metal.
This phenomenon, whose magnitude is affected by the die semi-angle α and the reduction of area per pass r [4,5], is associated with an internal distortion process that takes place in the bar as it flows through the die, leading to the development of higher drawing forces and affecting the subsequent mechanical behavior of the material [4,6].
Therefore, Table 2 presents the average effective strains εmv and the redundant deformation factors φv of the AISI 304 stainless steel drawn bars, whose values have been calculated employing the final effective strain distributions obtained through visioplasticity (figure 4) and the procedure formerly displayed in other experimental evaluation [13].
Table 2: Average deformation εm and redundant deformation factors φ obtained in the visioplasticity and the stress-strain superposition techniques.
The superposition technique reflects the hardening characteristics of the material and its final mechanical properties, whereas the visioplasticity results would not be influenced by the subsequent mechanical behavior of the metal.
Online since: June 2011
Authors: A.M. Oladoye, W. O. Zubair, M.O.H. Amuda, O. Farombi, Johnson Olumuyiwa Agunsoye
This invariably implies that these different Al alloys have different microstructure and mechanical properties.
This produces grains of fine texture that correspondingly leads to good mechanical properties.
This affects the mechanical property of the 2xxx series Al-Cu alloy castings and assists in accelerated failure.
Hatch Effects of Alloying Elements and Impurities on Properties of Aluminum: properties and physical metallurgy.
Caceres and C.J Davidson: Effects of solidification rate and ageing on the microstructure and mechanical properties of AZ91 alloy.
This produces grains of fine texture that correspondingly leads to good mechanical properties.
This affects the mechanical property of the 2xxx series Al-Cu alloy castings and assists in accelerated failure.
Hatch Effects of Alloying Elements and Impurities on Properties of Aluminum: properties and physical metallurgy.
Caceres and C.J Davidson: Effects of solidification rate and ageing on the microstructure and mechanical properties of AZ91 alloy.
Online since: November 2013
Authors: Naratip Sangsai, Vanchai Laemlaksakul
Improvement of the mechanical and physical properties of a piece of particle board was to conform to the international standards.
Song et al. examined the wood-waste tires composites and found that the ratio of wood fiber to rubber particles and amount of MDI were the significant factors that influenced board mechanical properties [8].
From the table 2, it was found that interaction factors affected to MOE between (1) rubber and time, and (2) glue and time were showed significantly different at level of .05.
From Table 4, the main factors of glue and rubber were showed significantly different affected to IB at the level of .01.
Therefore, it is necessary to increase the amount of glue for improving the mechanical properties as well as pressed time along with the amount of increasing glue.
Song et al. examined the wood-waste tires composites and found that the ratio of wood fiber to rubber particles and amount of MDI were the significant factors that influenced board mechanical properties [8].
From the table 2, it was found that interaction factors affected to MOE between (1) rubber and time, and (2) glue and time were showed significantly different at level of .05.
From Table 4, the main factors of glue and rubber were showed significantly different affected to IB at the level of .01.
Therefore, it is necessary to increase the amount of glue for improving the mechanical properties as well as pressed time along with the amount of increasing glue.
Online since: August 2016
Authors: Jorge Fernandez Dos Santos, N.L. Vale, Oscar Olimpio Araújo Filho, I.R. Melo, Severino Leopoldino Urtiga Filho
Aluminium alloy 7050 in a T7451 temper was friction-stir welded (FSW) to investigate the effects of different process parameters on the microstructure and mechanical properties.
The processing of FSW, the microstructure in FSW alloys and the factors influencing weld quality are introduced.
The local microstructure determines the weld mechanical properties.
T7451 is an overaged temper, specially developed by the aluminum industry to optimize corrosion resistance and mechanical properties.
In order to understand how the heat generated affects the stir zone (SZ) area and how the SZ area relates to the mechanical properties of the welds, its area was plotted as a function of heat input (Fig. 5B).
The processing of FSW, the microstructure in FSW alloys and the factors influencing weld quality are introduced.
The local microstructure determines the weld mechanical properties.
T7451 is an overaged temper, specially developed by the aluminum industry to optimize corrosion resistance and mechanical properties.
In order to understand how the heat generated affects the stir zone (SZ) area and how the SZ area relates to the mechanical properties of the welds, its area was plotted as a function of heat input (Fig. 5B).
Online since: July 2018
Authors: S.V. Akhonin, V.Yu. Belous, V.A. Berezos, R.V. Selin
Effect of TIG-Welding on the Structure and Mechanical Properties of the Pseudo-β Titanium Alloy VT19 Welded Joints
S.V.
Mechanical properties of the obtained welded joints were analyzed and dependency of tensile strength and amount of β-phase were build. 1.
Mechanical characteristics of modern pseudo-β titanium alloys welds must match the level of mechanical properties of the base metal.
For similar power elements pseudo-β titanium alloy VT19is applied, which possess high mechanical and technological properties [4,5]. 2.
Analysis of Mechanical Properties and Discussion Analysis of the mechanical properties of welded joints of titanium pseudo-β-alloy VT19 (Table 2) formed TIG-welding with flux led to the conclusion that low strength values in the state after welding have welds made at welding speed of 16 m/h which corresponds to mode № 3 and №4 (Table 1).
Mechanical properties of the obtained welded joints were analyzed and dependency of tensile strength and amount of β-phase were build. 1.
Mechanical characteristics of modern pseudo-β titanium alloys welds must match the level of mechanical properties of the base metal.
For similar power elements pseudo-β titanium alloy VT19is applied, which possess high mechanical and technological properties [4,5]. 2.
Analysis of Mechanical Properties and Discussion Analysis of the mechanical properties of welded joints of titanium pseudo-β-alloy VT19 (Table 2) formed TIG-welding with flux led to the conclusion that low strength values in the state after welding have welds made at welding speed of 16 m/h which corresponds to mode № 3 and №4 (Table 1).
Online since: October 2014
Authors: Jian Xiu Su, Li Jie Ma, Su Fang Fu, Jian Guo Yao
Chemical mechanical polishing (CMP) slurry was one of the key factors of CMP technology.
In this paper, through investigating the changes of several factors to evaluate the performance of CMP, such as the material removal rate (MRR), surface roughness Ra, 3D surface profiler, etc., the influence of various slurry and its content on the polishing efficiency and surface finish quality had been studied.
The results showed that different oxidant had different chemical action mechanism, also affecting the stability of CMP slurry and surface quality of specimen; adding suitable an oxidant to slurry could effectively improve the CMP performance.
Fig.3 The effect of oxidant content on MRR Hydrogen peroxide, a chemical compound with the formula (H2O2), had not been to taken as a slurry composition in the former experiments due to the property, its volatilizing and decomposing easily when encountered the light.
Gamble, et al., Chemi-Mechanical Polishing of On-Axis Semi-insulating SiC Substrates[J].
In this paper, through investigating the changes of several factors to evaluate the performance of CMP, such as the material removal rate (MRR), surface roughness Ra, 3D surface profiler, etc., the influence of various slurry and its content on the polishing efficiency and surface finish quality had been studied.
The results showed that different oxidant had different chemical action mechanism, also affecting the stability of CMP slurry and surface quality of specimen; adding suitable an oxidant to slurry could effectively improve the CMP performance.
Fig.3 The effect of oxidant content on MRR Hydrogen peroxide, a chemical compound with the formula (H2O2), had not been to taken as a slurry composition in the former experiments due to the property, its volatilizing and decomposing easily when encountered the light.
Gamble, et al., Chemi-Mechanical Polishing of On-Axis Semi-insulating SiC Substrates[J].
Online since: September 2013
Authors: Zheng Shun Wang, Zhao Hui Zhen
Because of the coating binder migration in cross-section of coating layer, the binder concentration will be different in z-direction of coating layer, which affect some properties of coated paper.
The Paper studied the effects of pigment type, coating color solid content and dying temperature on binder migration and affected factors.
Introduction The final result of coating binder migration in coated paper influences the structure and surface state, affects the coating operation and the properties of the coated paper.
Numerous and related factors affect binder migration, such as coating process, coating color formulation, base paper properties, coating method, drying way and drying speed, binder types, pigments type and pigment particle size and so on, therefore so far it is difficult to find a migration rate or concentration distribution theory equation or empirical formula to describe the binder migration accurately.
Pigments type affected the coating binder migration.
The Paper studied the effects of pigment type, coating color solid content and dying temperature on binder migration and affected factors.
Introduction The final result of coating binder migration in coated paper influences the structure and surface state, affects the coating operation and the properties of the coated paper.
Numerous and related factors affect binder migration, such as coating process, coating color formulation, base paper properties, coating method, drying way and drying speed, binder types, pigments type and pigment particle size and so on, therefore so far it is difficult to find a migration rate or concentration distribution theory equation or empirical formula to describe the binder migration accurately.
Pigments type affected the coating binder migration.