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Online since: May 2020
Authors: Miroslav Manas, Martin Ovsik, Aleš Mizera, Pavel Stoklásek
Masaryka 5555, 760 01, Zlin, Czech Republic
a*pstoklasek@utb.cz, bmizera@utb.cz, cmanas@utb.cz, dovsik@utb.cz
Keywords: nanohardness, depth sensing indentation, mechanical properties, laser cutting, plasma cutting, wire electrical discharge machining, waterjet cutting, heat-affected zone
Abstract.
These limiting factors have led to the development of so-called unconventional methods suitable for machining and cutting materials.
The term HAZ is also widely used in the welding, where it defines an area close to the weld with other chemical and mechanical properties than the weld material and the base material. [3-7] The heat-affected area usually consists of multiple bands.
However, it was first necessary to create a cut on the test specimens that would enable measurement of the mechanical properties of the HAZ and metallographic analysis.
Areas with this type of damage have deteriorated mechanical properties and lower corrosion resistance.
These limiting factors have led to the development of so-called unconventional methods suitable for machining and cutting materials.
The term HAZ is also widely used in the welding, where it defines an area close to the weld with other chemical and mechanical properties than the weld material and the base material. [3-7] The heat-affected area usually consists of multiple bands.
However, it was first necessary to create a cut on the test specimens that would enable measurement of the mechanical properties of the HAZ and metallographic analysis.
Areas with this type of damage have deteriorated mechanical properties and lower corrosion resistance.
Online since: June 2008
Authors: Enrique Otero, Álvaro Rico, Miguel Ángel Garrido-Maneiro, J. Rodríguez, Alicia Salazar
Size independent properties can be determined after considering
geometrical factors such as tip rounding and indenter deformation.
Nanostructured coatings show slightly better mechanical properties than conventional coatings.
Nanoindentation is a powerful tool to evaluate mechanical properties of thin films and coatings.
Mechanical properties were calculated through the experimental P - h curves using the Oliver and Pharr method.
- Nanostructured coatings show slightly better mechanical properties than conventional ones.
Nanostructured coatings show slightly better mechanical properties than conventional coatings.
Nanoindentation is a powerful tool to evaluate mechanical properties of thin films and coatings.
Mechanical properties were calculated through the experimental P - h curves using the Oliver and Pharr method.
- Nanostructured coatings show slightly better mechanical properties than conventional ones.
Online since: February 2021
Authors: Melih Cemal Kushan, Selim Gürgen, Özer Özdemir
In the mechanical analyses, hardness and tensile testing properties were investigated for the specimens.
In the mechanical analyses, hardness and tensile testing properties were investigated for the specimens.
Since the wave propagation is dependent on graphite morphology, which also affects the mechanical properties of the alloys, it naturally shows a correlation with the material properties.
Since both mechanical and ultrasonic properties show strong correlations with graphite nodularity, it is possible to use ultrasonic measurements to predict the mechanical properties.
Omran, “Optimization of the process parameters affecting the microstructures and properties of compacted graphite iron,” J.
In the mechanical analyses, hardness and tensile testing properties were investigated for the specimens.
Since the wave propagation is dependent on graphite morphology, which also affects the mechanical properties of the alloys, it naturally shows a correlation with the material properties.
Since both mechanical and ultrasonic properties show strong correlations with graphite nodularity, it is possible to use ultrasonic measurements to predict the mechanical properties.
Omran, “Optimization of the process parameters affecting the microstructures and properties of compacted graphite iron,” J.
Online since: September 2014
Authors: Mohd Amin bin Abd Majid, Muhammad Sarwar
Introduction
In any welding process the input parameters have an influence on joint’s mechanical properties.
By varying the input process parameter’s combinations, the output would be different welded joints with significant variation in their mechanical properties.
The variations in the process parameters affect the mechanical properties with great extent.
Among these elements Cr, Mo and Mn are the most important and influencing the weld properties.
The current is not so significantly affecting the hardness of the welded joint.
By varying the input process parameter’s combinations, the output would be different welded joints with significant variation in their mechanical properties.
The variations in the process parameters affect the mechanical properties with great extent.
Among these elements Cr, Mo and Mn are the most important and influencing the weld properties.
The current is not so significantly affecting the hardness of the welded joint.
Online since: May 2016
Authors: Ji Hyun Kim, Jin Won Kim, Sang Won Park, Min Ji Kim, Gye Jeong Oh, Kyung Jun Jang, Min Kyung Ji, Jae Sam Ban, Hyun Pil Lim, Kwi Dug Yun, Chan Park
The mechanical properties of glass infiltrated zirconia were not inferior to those of zirconia.
Glass infiltration with ferric oxide into zirconia can improve the color and mechanical properties of zirconia and be applicable for dental purpose.
It is a high-performance material with excellent biocompatibility and mechanical properties, which render it suitable for posterior prostheses in dentistry [1].
The mechanical properties of glass infiltrated zirconia were not inferior to those of zirconia.
Gao, Effect of three kinds of rare earth oxides on chromaticity and mechanical properties of zirconia ceramic.
Glass infiltration with ferric oxide into zirconia can improve the color and mechanical properties of zirconia and be applicable for dental purpose.
It is a high-performance material with excellent biocompatibility and mechanical properties, which render it suitable for posterior prostheses in dentistry [1].
The mechanical properties of glass infiltrated zirconia were not inferior to those of zirconia.
Gao, Effect of three kinds of rare earth oxides on chromaticity and mechanical properties of zirconia ceramic.
Online since: December 2010
Authors: Sarum Boonmee, Doru Michael Ştefănescu
The Mechanism of Formation of Casting Skin in CG Iron and its Effect
on Tensile Properties
Sarum Boonmee a and Doru M.
Introduction It has been reported that iron with as-cast surface has lower mechanical properties than fully machined test bars [1,2,3,4] because of the casting skin effect.
This effect can be more severe for fatigue properties.
(left) graphite shape factors (right) average graphite area and percent graphite [7].
Effect of type of binder on the pearlitic rim; 4% Nital etched [7] The negative effect of skin thickness on the mechanical properties is shown in Fig. 8.
Introduction It has been reported that iron with as-cast surface has lower mechanical properties than fully machined test bars [1,2,3,4] because of the casting skin effect.
This effect can be more severe for fatigue properties.
(left) graphite shape factors (right) average graphite area and percent graphite [7].
Effect of type of binder on the pearlitic rim; 4% Nital etched [7] The negative effect of skin thickness on the mechanical properties is shown in Fig. 8.
Online since: September 2020
Authors: Chao Chang Arthur Chen, Van Thanh Hoang, Quang Bang Tao, Duc Binh Luu
Mechanical Properties of PMMA/PC Blend by Injection Molding Process
Van Thanh Hoang1,a*, Duc Binh Luu1,b, Quang Bang Tao1,c,
Chao-Chang A.
Mechanical properties including tensile and impact strengths were carried out at room temperature of 23oC.
The factors and levels are shown in table 1.
In addition, impact behavior is more strongly affected by melt temperature in comparing to the tensile property.
Cooling time was found to be the least significant parameter for the mechanical properties.
Mechanical properties including tensile and impact strengths were carried out at room temperature of 23oC.
The factors and levels are shown in table 1.
In addition, impact behavior is more strongly affected by melt temperature in comparing to the tensile property.
Cooling time was found to be the least significant parameter for the mechanical properties.
Online since: December 2013
Authors: Teng Kuo Zhu, Hong Lei Zhu, He Jie Han, Ruo Chong Yang, Kai Li, Ji Peng Zhu
Through test of compression, relationships of mechanical properties of samples were studied.
For cement and fine aggregate are the most important factors which affect the shrinkage performance of cement stabilized gravel, researchers added flexible material into the mixture to study that if it could improve the shrinkage performance.
Results and Discussion Mechanical Properties.
Different dosages of rubber particles volume and different molding methods may play major impacts on mechanical properties.
Research on the Physico-mechanical Properties and Durability of Crumb Rubber-modified Concrete[D].
For cement and fine aggregate are the most important factors which affect the shrinkage performance of cement stabilized gravel, researchers added flexible material into the mixture to study that if it could improve the shrinkage performance.
Results and Discussion Mechanical Properties.
Different dosages of rubber particles volume and different molding methods may play major impacts on mechanical properties.
Research on the Physico-mechanical Properties and Durability of Crumb Rubber-modified Concrete[D].
Online since: November 2017
Authors: Jakub Lacza, Jana Sobotová, Martin Kuřík
Effect of Chemical Composition and Heat Treatment Parameters
on the Structure and Properties of Vanadis 23 and Vanadis 30
PM High-Speed Steels
Jana SOBOTOVÁ1,a*, Martin KUŘÍK1,b and Jakub LACZA1,c
1Czech Technical University in Prague, Faculty of Mechanical Engineering,
Karlovo nám. 13, 121 35 Prague 2, Czech Republic
aJana.Sobotova@fs.cvut.cz, bMartin.Kurik@fs.cvut.cz, cJakublacza@gmail.com
Keywords: PM high-speed steel, cobalt, conventional heat treatment, deep cryogenic treatment, metallographic analysis, mechanical properties
Abstract.
The paper deals with the assessment of the effect of content of cobalt and cryogenic treatment on mechanical properties and structure of Vanadis 23 and Vanadis 30 PM high-speed steels.
The mechanical properties are assessed by a three-point bending flexural test and by measurement of the hardness.
This method of processing is used to remove retained austenite combined with fine precipitation which were observed concurrently with an improvement of mechanical properties, typically hardness and wear resistance and to achieve an optimal ratio between properties like hardness and toughness which go in the opposite direction [7,8].
Theisen, Evaluation of factors influencing deep cryogenic treatment that affect the properties of tool steels, Journal of Materials Processing Technology. 210 (2010) 1949-1955.
The paper deals with the assessment of the effect of content of cobalt and cryogenic treatment on mechanical properties and structure of Vanadis 23 and Vanadis 30 PM high-speed steels.
The mechanical properties are assessed by a three-point bending flexural test and by measurement of the hardness.
This method of processing is used to remove retained austenite combined with fine precipitation which were observed concurrently with an improvement of mechanical properties, typically hardness and wear resistance and to achieve an optimal ratio between properties like hardness and toughness which go in the opposite direction [7,8].
Theisen, Evaluation of factors influencing deep cryogenic treatment that affect the properties of tool steels, Journal of Materials Processing Technology. 210 (2010) 1949-1955.
Online since: August 2013
Authors: Yong Sheng Ma, Li Qiang Huang, Cheng Sun, Xin Ni Mu
Research on in-planestatic mechanical performance of honeycombpaperboard based on virtual simulation
Xinni Mu1, a, Cheng Sun1,2,b, LiqiangHuang2,c and Yongsheng Ma2,d
1Tianjin Vocational Institute, Tianjin 300410, P.R.
Simulation analysis was made with the factors of the base paper and the structure of honeycomb paperboard by means of ANSYS after abstract and simplify honeycomb paperboard model.The results show thatfactors ofquantification of surface paper, cell length, paperboard thickness and aperture ratio all have a great effect onthe mechanics performance of honeycomb paperboard.
With the increase of cell length and paperboard thickness, the platform stress and peak stress under different compression direction of honeycomb paperboard all decrease, providing a reference for the study of numerical simulation and mechanical property tests.
Introduction Predecessors have done a lot of research work to the metalhoneycomb materialsonin-plane mechanical properties, andmost of the research work is based on the theory and experiment.Because paper is soft and anisotropy, so the mechanical properties and damage forms of honeycomb paperboard are complex, the existing research achievements cannot fully reflect the in-plane mechanical properties of honeycomb paperboard.This paper will make a scientific finite element modeland do in-plane stress analysiswith the help of ANSYS,it will be easy to verify all kinds of factors affecting the performance of the honeycomb paperboard, providing a reference for the study of numerical simulation and mechanical property test.
The effect of surface paper is higher than the core paper on the performance of honeycomb paperboard.Paperboard thickness, cell length and aperture ratio all have a great influence to the in-plane performance of honeycomb paperboard, with the increase of cell length andpaperboard thickness, the platform stress and peak stress under different compression direction of honeycomb paperboard all decrease,providing a reference for the study of numerical simulation and mechanical property tests.
Simulation analysis was made with the factors of the base paper and the structure of honeycomb paperboard by means of ANSYS after abstract and simplify honeycomb paperboard model.The results show thatfactors ofquantification of surface paper, cell length, paperboard thickness and aperture ratio all have a great effect onthe mechanics performance of honeycomb paperboard.
With the increase of cell length and paperboard thickness, the platform stress and peak stress under different compression direction of honeycomb paperboard all decrease, providing a reference for the study of numerical simulation and mechanical property tests.
Introduction Predecessors have done a lot of research work to the metalhoneycomb materialsonin-plane mechanical properties, andmost of the research work is based on the theory and experiment.Because paper is soft and anisotropy, so the mechanical properties and damage forms of honeycomb paperboard are complex, the existing research achievements cannot fully reflect the in-plane mechanical properties of honeycomb paperboard.This paper will make a scientific finite element modeland do in-plane stress analysiswith the help of ANSYS,it will be easy to verify all kinds of factors affecting the performance of the honeycomb paperboard, providing a reference for the study of numerical simulation and mechanical property test.
The effect of surface paper is higher than the core paper on the performance of honeycomb paperboard.Paperboard thickness, cell length and aperture ratio all have a great influence to the in-plane performance of honeycomb paperboard, with the increase of cell length andpaperboard thickness, the platform stress and peak stress under different compression direction of honeycomb paperboard all decrease,providing a reference for the study of numerical simulation and mechanical property tests.