Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: August 2012
Authors: Marcello Filgueira, Luciano José de Oliveira
Compression tests were carried out to evaluate the elastic properties of composites, i.e., modulus of elasticity (E) and yield stress (σe), aiming at the assessment of the metal matrix-diamond adhesion.
The alloys properties can be improved with addition of some materials in definite proportions.
One can observe that for optimum productivity and cutting efficiency, the matrix should have good mechanical properties, because during cutting operation, diamonds particles are subjected to stress by direct contact with work piece.
These stresses are transmitted directly to the bonding matrix, so its mechanical behavior is very important.
In a general way, one can see that the yield stress did not change significantly (350 MPa in average), except for the composite M4 showing a value slightly lower and composite M3, which reached a value a little higher, reaching the best properties.
The alloys properties can be improved with addition of some materials in definite proportions.
One can observe that for optimum productivity and cutting efficiency, the matrix should have good mechanical properties, because during cutting operation, diamonds particles are subjected to stress by direct contact with work piece.
These stresses are transmitted directly to the bonding matrix, so its mechanical behavior is very important.
In a general way, one can see that the yield stress did not change significantly (350 MPa in average), except for the composite M4 showing a value slightly lower and composite M3, which reached a value a little higher, reaching the best properties.
Online since: August 2013
Authors: Yong Ping Xie, Gang Sun, Lei Jia
Destruction Form and Influencing Factors of Reinforced Concrete Column
The destruction forms of RC column are mainly divided into bending damage, shear failure and bond damage under earthquake force.
Besides, according to the ductility, the damage forms are also divided into four types by hiro zawa masaya in the study of influence factors affecting column ductility.
According to the shear span ratio, yamada minorudivide the deformation properties and damage form of column into the ductile bending damage of long column (shear span ratio is equal or greater than 2) and brittle shear damage of short column (shear span ratio is lesser than 2).
Many factors, shear span ratio, stirrup ratio, reinforcement ratio, and axial ratio and so on, were considered, failure pattern of these specimens were eventually divided into bend damage, shear failure, bond cracking destruction and crushing bond cracking destruction.
[16]H.Y.Huang.Study on Size Effects and Mechanical Parameters of Concrete.HoHai University
Besides, according to the ductility, the damage forms are also divided into four types by hiro zawa masaya in the study of influence factors affecting column ductility.
According to the shear span ratio, yamada minorudivide the deformation properties and damage form of column into the ductile bending damage of long column (shear span ratio is equal or greater than 2) and brittle shear damage of short column (shear span ratio is lesser than 2).
Many factors, shear span ratio, stirrup ratio, reinforcement ratio, and axial ratio and so on, were considered, failure pattern of these specimens were eventually divided into bend damage, shear failure, bond cracking destruction and crushing bond cracking destruction.
[16]H.Y.Huang.Study on Size Effects and Mechanical Parameters of Concrete.HoHai University
Online since: March 2024
Authors: Alemu Gurmessa Gindaba, Sampandam Elangovan, Menberu Mengesha Woldemariam, Senbeto Kena Etana
Our findings reveal that the solid GaAs surface tends to capture electrons under the influences of external magnetic fields and pressure thus binding electrons and putting additional confining potential meanwhile the surface properties are affected.
We employed computational methods used for the two-dimensional materials and presents how the materials' properties change with dimensionality.
Haik, Magnetic nanoparticles: surface effects and properties related to biomedicine applications, Int J Mol Sci. 14 (2013) 21266–21305
Dong, Microstructure and magnetic properties of FeCoHfN thin films deposited by DC reactive sputtering, J Magn Magn Mater. 547(2022) 168777
Suzuki, Soft magnetic and structural properties of (FeCo)–(AlSi) alloy thin films, J Magn Magn Mater. 507(2020)166852
We employed computational methods used for the two-dimensional materials and presents how the materials' properties change with dimensionality.
Haik, Magnetic nanoparticles: surface effects and properties related to biomedicine applications, Int J Mol Sci. 14 (2013) 21266–21305
Dong, Microstructure and magnetic properties of FeCoHfN thin films deposited by DC reactive sputtering, J Magn Magn Mater. 547(2022) 168777
Suzuki, Soft magnetic and structural properties of (FeCo)–(AlSi) alloy thin films, J Magn Magn Mater. 507(2020)166852
Online since: July 2006
Authors: Gary J. Shiflet, E.A. Jr. Starke, Ai Wu Zhu
First principle calculations can be used to study fundamental properties of
these phases and, therefore, help to identify the desired ones and their precipitate structures.
For measuring the strength of materials using uniaxial mechanical tests, the Schmid factor for single crystals or the Taylor factor, M, for polycrystals are conveniently used to account for the effect of crystallographic orientation or texture with respect to the applied loading direction.
The 2 nd phase particle size distribution and volume fraction etc. depend on the chemistry and processing factors, and the shape and orientation usually on the crystallographic relationship between the 2 nd phase and the Al matrix.
Whether or not they are sheared by dislocations is very critical for their strengthening effect and for other mechanical properties including ductility and rupture life.
Atomic clusters or SROs have been seen in many other alloys, and play different roles for the microstructure evolution and mechanical properties.
For measuring the strength of materials using uniaxial mechanical tests, the Schmid factor for single crystals or the Taylor factor, M, for polycrystals are conveniently used to account for the effect of crystallographic orientation or texture with respect to the applied loading direction.
The 2 nd phase particle size distribution and volume fraction etc. depend on the chemistry and processing factors, and the shape and orientation usually on the crystallographic relationship between the 2 nd phase and the Al matrix.
Whether or not they are sheared by dislocations is very critical for their strengthening effect and for other mechanical properties including ductility and rupture life.
Atomic clusters or SROs have been seen in many other alloys, and play different roles for the microstructure evolution and mechanical properties.
Online since: June 2014
Authors: Mohd Bin Sulaiman Hafis, R.N. Farahana, Mohd Jamir Mohd Ridzuan, A.R. Mohamed
The lubricant properties of PO and PPF oil were shown in Table 1.
Table 1: Lubricant properties of test lubricant.
Properties PO PPF LV Density, ρ (g/cm3) 0.873 0.730 0.772 Kinematic viscosity, μk @ 40 °C (mPa.s) 38.9 3.491 1.305 Table 2: Material properties of aluminium A1100 and steel SKD11.
The aluminium strip was heated for 3 hours at 350 °C to adjust the chemical composition, annihilate rolling texture and establish a recrystallised structure with isotropic mechanical properties.
It was found that the stresses on the strip surfaces led to the findings that the most influencing friction coefficient factors are sliding velocity, lubrication conditions, and contact pressure [8].
Table 1: Lubricant properties of test lubricant.
Properties PO PPF LV Density, ρ (g/cm3) 0.873 0.730 0.772 Kinematic viscosity, μk @ 40 °C (mPa.s) 38.9 3.491 1.305 Table 2: Material properties of aluminium A1100 and steel SKD11.
The aluminium strip was heated for 3 hours at 350 °C to adjust the chemical composition, annihilate rolling texture and establish a recrystallised structure with isotropic mechanical properties.
It was found that the stresses on the strip surfaces led to the findings that the most influencing friction coefficient factors are sliding velocity, lubrication conditions, and contact pressure [8].
Online since: December 2010
Authors: R.I. Babicheva, I.Z. Sharipov, K.J. Mulyukov
., Ufa, Russia
a rita.babi4eva@yandex.ru
Keywords: TiNi shape memory alloy; Martensitic phase transformation; Thermal expansion; Electrical properties; X-Ray diffraction analysis.
Introduction It is well known that the change of treatment temperature affects on propertiers of metals and alloys.
One of the most simple and widespread methods of improvement of mechanical properties is hot plastic deformation.
Unfortunately, the main factors of TWSME stability remain still not quite understandable especially in the case of thermal cycling without any load.
One of the most sensitive properties of material to any structural or phase composition changes is electrical resistance of an alloy.
Introduction It is well known that the change of treatment temperature affects on propertiers of metals and alloys.
One of the most simple and widespread methods of improvement of mechanical properties is hot plastic deformation.
Unfortunately, the main factors of TWSME stability remain still not quite understandable especially in the case of thermal cycling without any load.
One of the most sensitive properties of material to any structural or phase composition changes is electrical resistance of an alloy.
Online since: March 2020
Authors: Ario Sunar Baskoro, Sugeng Supriadi, Bambang Suharno, Dharmanto Dharmanto, Tsaome Indah Susimah, Muhammad Haekal Sena Akbar
Effect of Pressure on the Gas Atomizer to Fabricate Stainless Steel Metal Powder
Sugeng Supriadi1,a,*, Tsaome Indah Susimah2,b, Muhammad Haekal Sena Akbar2,c, Bambang Suharno2,d, Ario Sunar Baskoro1,e, and Dharmanto1,f
1Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Depok, 16424, Indonesia
2Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Depok, 16424, Indonesia
asugeng@eng.ui.ac.id, btsaomeindahs@gmail.com, chaekal.sena@gmail.com dsuharno@metal.ui.ac.id, eario@eng.ui.ac.id, fdharmanto.mesin@gmail.com
*Corresponding author: sugeng@eng.ui.ac.id
Keywords: Free Fall Gas Atomizer, Metal Injection Molding, Gas Pressure, Powder Metallurgy, Stainless Steel
Abstract.
Referring to the previous study, powder with a smaller size will have better results on the mentioned properties in the final product [6, 7].
(a) (b) (c) well-rounded rounded sub-rounded sub-angular angular very angular Fig. 3 The measurements of the particle comparison are indicated by giving different colored-label for each shape category on the SEM results of: (a) 8 bar pressure, (b) 10 bar pressure, and (c) 12 bar pressure Fig. 4 Effects of gas pressure on powder morphology Based on a study [10], factors affecting the roundness of the particle are mainly due to either collision between the metal powder particle itself or between the metal powder particle with any existing particle during the solidification process.
Samal, Powder metallurgy stainless steels: processing, microstructures, and properties: ASM international, 2007
Sanetrnik, "Rheological properties of gas and water atomized 17-4PH stainless steel MIM feedstocks: Effect of powder shape and size," Powder Technology, vol. 312, pp. 152-158, 2017
Referring to the previous study, powder with a smaller size will have better results on the mentioned properties in the final product [6, 7].
(a) (b) (c) well-rounded rounded sub-rounded sub-angular angular very angular Fig. 3 The measurements of the particle comparison are indicated by giving different colored-label for each shape category on the SEM results of: (a) 8 bar pressure, (b) 10 bar pressure, and (c) 12 bar pressure Fig. 4 Effects of gas pressure on powder morphology Based on a study [10], factors affecting the roundness of the particle are mainly due to either collision between the metal powder particle itself or between the metal powder particle with any existing particle during the solidification process.
Samal, Powder metallurgy stainless steels: processing, microstructures, and properties: ASM international, 2007
Sanetrnik, "Rheological properties of gas and water atomized 17-4PH stainless steel MIM feedstocks: Effect of powder shape and size," Powder Technology, vol. 312, pp. 152-158, 2017
Online since: October 2023
Authors: Shuhei Kajiwara, Takahiro Matsueda, Koshiro Mizobe, Katsuyuki Kida
In addition, Fan et al. [2] indicated that crack propagation and wear factors dominated the failure behaviour under contact loading.
These studies imply that it is important to study the failure pattern which is affected by the contact loading situations.
Polyphenylene sulfide (PPS) is an industrial polymer with excellent mechanical properties [4].
Experimental Procedure Table 1 shows the properties of PPS specimens [7].
Properties of PPS specimens [7].
These studies imply that it is important to study the failure pattern which is affected by the contact loading situations.
Polyphenylene sulfide (PPS) is an industrial polymer with excellent mechanical properties [4].
Experimental Procedure Table 1 shows the properties of PPS specimens [7].
Properties of PPS specimens [7].
The Effects of Silver Nanoparticles on the Antimicrobial and Biodegradation of Cornstarch Bioplastic
Online since: February 2024
Authors: Mochamad Chalid, Dedi Priadi, Rina Ningtyas, Shanaz Nadya, Muryeti Muryeti
The addition of nanoparticles was carried out to improve the properties of bioplastic packaging.
In addition, the incorporation of nanoparticles into biopolymers can lead to the development of materials with better physical-mechanical properties [6].
Nanotechnology can improve mechanical and antimicrobial properties so that it has the potential to be developed as food packaging [7].
Research on developing the functional properties of bioplastics using silver nanoparticles (AgNPs) has been carried out on aren starch, with results that this compound is suitable for antibacterial coatings, with the best composition that fulfills all mechanical properties and has better antimicrobial properties 3 wt% [8].
Formation of polar groups such as -OH groups showed that the hydrophilicity of AgNPs was affected by the type of stabilizer used [13].
In addition, the incorporation of nanoparticles into biopolymers can lead to the development of materials with better physical-mechanical properties [6].
Nanotechnology can improve mechanical and antimicrobial properties so that it has the potential to be developed as food packaging [7].
Research on developing the functional properties of bioplastics using silver nanoparticles (AgNPs) has been carried out on aren starch, with results that this compound is suitable for antibacterial coatings, with the best composition that fulfills all mechanical properties and has better antimicrobial properties 3 wt% [8].
Formation of polar groups such as -OH groups showed that the hydrophilicity of AgNPs was affected by the type of stabilizer used [13].
Online since: April 2013
Authors: Ivan Tomašić, Zrinaka Vidovic-Tisanic
The economic factors significantly decreased the number of active quarries and natural stone varieties on the domestic market.
High decorative, physical and mechanical properties of small stone blocks and tombolons have also great positive influence on possible profitable exploitation and processing.
High decorative, physical and mechanical properties of small stone blocks have also positive significant influence on market prices and efficiency of exploitation.
The shape of ore body depends on a number of different geological factors.
In particular, this will affect the sustainable management of stocks of natural stone.
High decorative, physical and mechanical properties of small stone blocks and tombolons have also great positive influence on possible profitable exploitation and processing.
High decorative, physical and mechanical properties of small stone blocks have also positive significant influence on market prices and efficiency of exploitation.
The shape of ore body depends on a number of different geological factors.
In particular, this will affect the sustainable management of stocks of natural stone.