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Online since: October 2012
Authors: Bohuslav Mašek, Mária Behúlová, David Aišman, Indrani Sen, Martin F.X. Wagner, Hana Jirková, Martin Kusý
Apart from economic considerations, introduction of thixoforming of steel to industry is driven by other factors.
In selecting a steel for the process, great emphasis must be laid on its thixoformability which depends on the temperature range between solidus and liquidus temperatures of the steel , on the suitability of its semi-solid condition for forming and on further factors, see reference [1].
The thixotropic properties of a material considerably depend also on the proportion of the material in the liquid state [1, 4-5].
If this microstructural configuration could be inverted, i.e., if hard particles were embedded in a ductile matrix, various mechanical properties (such as wear resistance) could likely be considerably improved.
This will allow the mechanical properties of semi-solid-processed materials to be determined directly in future investigations.
In selecting a steel for the process, great emphasis must be laid on its thixoformability which depends on the temperature range between solidus and liquidus temperatures of the steel , on the suitability of its semi-solid condition for forming and on further factors, see reference [1].
The thixotropic properties of a material considerably depend also on the proportion of the material in the liquid state [1, 4-5].
If this microstructural configuration could be inverted, i.e., if hard particles were embedded in a ductile matrix, various mechanical properties (such as wear resistance) could likely be considerably improved.
This will allow the mechanical properties of semi-solid-processed materials to be determined directly in future investigations.
Online since: February 2012
Authors: Bernd-Arno Behrens, A. Erman Tekkaya, Annika Foydl, Insa Pfeiffer, Andreas Jäger, Matthias Kammler, Thorsten Matthias, Daniel Pietzka
The aim is to produce forging parts with locally adapted properties.
The mechanical properties of AA6082 used for the simulations were determined by means of upsetting tests at the IFUM using a servo hydraulic testing machine (Instron VHS 400 kN).The elastic-plastic properties of the embedded wires of the stainless steel X10CrNi18-8 (1.4310) were taken from the materials database of the FEA package.
The results of these investigations show for Tresca’s friction model with a factor of m = 1.0 good agreement of numerical and experimental determined material flow close to tool surfaces.
The position of the elements is mainly affected by the element position in the billet, the reinforcing element length itself and the extrusion ratio.
Analyses of the increasing mechanical strength of the reinforced forging parts compared to parts without reinforcements have to be carried out.
The mechanical properties of AA6082 used for the simulations were determined by means of upsetting tests at the IFUM using a servo hydraulic testing machine (Instron VHS 400 kN).The elastic-plastic properties of the embedded wires of the stainless steel X10CrNi18-8 (1.4310) were taken from the materials database of the FEA package.
The results of these investigations show for Tresca’s friction model with a factor of m = 1.0 good agreement of numerical and experimental determined material flow close to tool surfaces.
The position of the elements is mainly affected by the element position in the billet, the reinforcing element length itself and the extrusion ratio.
Analyses of the increasing mechanical strength of the reinforced forging parts compared to parts without reinforcements have to be carried out.
Online since: January 2022
Authors: Vivian Loftness, Kent A. Harries, Erica Cochran Hameen, Lola Ben-Alon
· What factors affect the motivation of end users to use earthen building materials and methods in the construction or renovations of their homes?
Specified machinery included mechanical mixer, block compressing machine, tractor, rammer, and excavator for sight leveling.
This result corresponds with the answers of the homeowners respondents, who rated indoor air quality, following by environmental factors (global climate change and resource depletion) as the most significant motivating factors in their choice of earthen materials.
In contrast, the least significant factors motivating homeowners (according to both experts and homeowners) are affordability and reduced utility bills.
Codes and standards development for nonconventional and vernacular materials, Nonconventional and Vernacular Construction Materials: Characterisation, Properties and Applications. https://doi.org/10.1016/B978-0-08-102704-2.00004-4 [4] Heathcote, K., 2011.
Specified machinery included mechanical mixer, block compressing machine, tractor, rammer, and excavator for sight leveling.
This result corresponds with the answers of the homeowners respondents, who rated indoor air quality, following by environmental factors (global climate change and resource depletion) as the most significant motivating factors in their choice of earthen materials.
In contrast, the least significant factors motivating homeowners (according to both experts and homeowners) are affordability and reduced utility bills.
Codes and standards development for nonconventional and vernacular materials, Nonconventional and Vernacular Construction Materials: Characterisation, Properties and Applications. https://doi.org/10.1016/B978-0-08-102704-2.00004-4 [4] Heathcote, K., 2011.
Online since: January 2025
Authors: Renaldi Candra Saputra, Aditya Kurnia Putra, Muhammad Ivan Fanani, Triyono Triyono
In mpyg/µAcm, the constant factor is 0.1288.
(2) HV is the number of Vickers hardness, 1854.4 is a factor constant, P is the force in gf, d is the indentation's mean diagonal length in µm.
Corrosion current value (Icorr) in the Tafel diagram is affected by the form of the curve since it is calculated from the tangent intersection of the curve that transitions from the cathode to the anode or vice versa.
Saputro, Microstructural and mechanical properties of underwater wet welded SS400 steel, J.
Gardner, Mechanical testing and microstructural analysis of wire arc additively manufactured steels, Mater.
(2) HV is the number of Vickers hardness, 1854.4 is a factor constant, P is the force in gf, d is the indentation's mean diagonal length in µm.
Corrosion current value (Icorr) in the Tafel diagram is affected by the form of the curve since it is calculated from the tangent intersection of the curve that transitions from the cathode to the anode or vice versa.
Saputro, Microstructural and mechanical properties of underwater wet welded SS400 steel, J.
Gardner, Mechanical testing and microstructural analysis of wire arc additively manufactured steels, Mater.
Online since: May 2014
Authors: Matteo Strano, Michele Monno, Stefano Tirelli, Elio Chiappini, Quirico Semeraro
The considered input factors are: type of cooling method, cutting speed and feed rate.
Introduction and state of the art Titanium alloys present many interesting mechanical properties (such as very high strength to weight ratio, high toughness, biocompatibility and good corrosion resistance) that promote the use of these materials not only in the aerospace industry, but also for bio-medical applications and for the chemical and oil & gas industries.
The ANOVA test has been used as the statistical method to determine if each investigated factor significantly affects the measured responses.
All factors and interaction are significant, with the exception of the interaction ln(f)*ln(t cum).
Segmentation frequency values range from about 3500 Hz to 7000 Hz, with cutting speed and feed rate being the significant factors.
Introduction and state of the art Titanium alloys present many interesting mechanical properties (such as very high strength to weight ratio, high toughness, biocompatibility and good corrosion resistance) that promote the use of these materials not only in the aerospace industry, but also for bio-medical applications and for the chemical and oil & gas industries.
The ANOVA test has been used as the statistical method to determine if each investigated factor significantly affects the measured responses.
All factors and interaction are significant, with the exception of the interaction ln(f)*ln(t cum).
Segmentation frequency values range from about 3500 Hz to 7000 Hz, with cutting speed and feed rate being the significant factors.
Online since: June 2019
Authors: Mario Caterino, Alessandro Greco, Elena Laudante
It specifies the main characteristics of safety control systems and which are the factors to be considered in the design of collaborative robot systems and represent a foundation for research work in this area for improving the technology and the Human Robot Interaction levels.
Composite materials can be easily damaged in the sense that a wrong processing can cause the loss of the material’s properties, and so, specific requirements must be respected to avoid these problems [19].
Leaving these operations carried out manually represent a risk, as the accuracy and, most of all, the repeatability are not ensured since the working task is affected by high variability.
Soprano, Handling of composite-metal interface in a hybrid mechanical coupling, AIP Conference Proceedings 1 (2012) 353-355
Soprano, Geometrical parameters influencing a hybrid mechanical coupling, Key Engineering Materials 525-526 (2013) 161-164
Composite materials can be easily damaged in the sense that a wrong processing can cause the loss of the material’s properties, and so, specific requirements must be respected to avoid these problems [19].
Leaving these operations carried out manually represent a risk, as the accuracy and, most of all, the repeatability are not ensured since the working task is affected by high variability.
Soprano, Handling of composite-metal interface in a hybrid mechanical coupling, AIP Conference Proceedings 1 (2012) 353-355
Soprano, Geometrical parameters influencing a hybrid mechanical coupling, Key Engineering Materials 525-526 (2013) 161-164
Online since: March 2015
Authors: Hong Xu, Yi Chao Ding, Chui Min Luo, Wen Yong Guan
The stiffness of joint surface between the base and post is largely affected by their own gravity and the contact stress is even-distributed.
Natural frequency and vibration mode, whose stability and reliability can improve the structure’s performance and avoid unnecessary losses, are important parameters of dynamic properties.
Obviously, it affects the performance of the machine tool. 3.2 LMS Test.Lab experiments and optimization This experiment used the LMS TEST.Lab noise and vibration equiment of Gelgium LMS Inc.
When the authors set the actual sensitivity of channel set up, the input of force is set as 2.25mV/N.The FRF estimator is H1.Different knocking position, different knocking force, sensors placement and others factors will influence the results directly of indirectly.
Modern mechanical dynamics and its engineeringapplication:Modeling,analysis,simulation,control,optimization.Beijing:China Machine Press,2004
Natural frequency and vibration mode, whose stability and reliability can improve the structure’s performance and avoid unnecessary losses, are important parameters of dynamic properties.
Obviously, it affects the performance of the machine tool. 3.2 LMS Test.Lab experiments and optimization This experiment used the LMS TEST.Lab noise and vibration equiment of Gelgium LMS Inc.
When the authors set the actual sensitivity of channel set up, the input of force is set as 2.25mV/N.The FRF estimator is H1.Different knocking position, different knocking force, sensors placement and others factors will influence the results directly of indirectly.
Modern mechanical dynamics and its engineeringapplication:Modeling,analysis,simulation,control,optimization.Beijing:China Machine Press,2004
Online since: June 2013
Authors: Gerhard Hirt, Markus Daamen, Silvia Richter
High-manganese TWIP steels are characterized by their extraordinary mechanical properties.
The investigations focused especially on the mechanical properties as a function of microstructure and twinning.
In addition to the increased demands on the mechanical properties, the required steel quality and thus the requirements for the production have also increased rapidly.
In addition to the production, the focus is placed especially on the microstructure, mechanical properties and the dominant forming mechanisms.
Charles, Effect of Second-Phase Particles on the Mechanical Properties of Steel, M.
The investigations focused especially on the mechanical properties as a function of microstructure and twinning.
In addition to the increased demands on the mechanical properties, the required steel quality and thus the requirements for the production have also increased rapidly.
In addition to the production, the focus is placed especially on the microstructure, mechanical properties and the dominant forming mechanisms.
Charles, Effect of Second-Phase Particles on the Mechanical Properties of Steel, M.
Online since: April 2014
Authors: Wei Tian, Ying Wang, Wu Jing, Mu Yu Liu, Xi Chen
Venkatesh Kodur analyzed the mechanical properties of simply supported girder bridge under the action of the fire in two different heating curves with finite element software ANSYS, and pointed out that the fire resistance performance of composite beam bridges were better than steel bridges and concrete bridges [5].
After thermal analysis, in the mechanical analysis, slings belonged to fine segment of main girder use solid45, and the other slings use link10, as shown in Fig.5.
Suspension bridge is statically structure and the destruction of the sling will cause the mechanical change of the main girder and the whole bridge, then affect the bearing capacity of suspension bridge.
Fighting actions against flammable explosive materials are difficult, which always result in vast property loss.
Although concrete, asphalt pavement, steel and steel strand are not combustible materials, mechanical properties such as elastic modulus, fell sharply under the high temperature strength of materials.
After thermal analysis, in the mechanical analysis, slings belonged to fine segment of main girder use solid45, and the other slings use link10, as shown in Fig.5.
Suspension bridge is statically structure and the destruction of the sling will cause the mechanical change of the main girder and the whole bridge, then affect the bearing capacity of suspension bridge.
Fighting actions against flammable explosive materials are difficult, which always result in vast property loss.
Although concrete, asphalt pavement, steel and steel strand are not combustible materials, mechanical properties such as elastic modulus, fell sharply under the high temperature strength of materials.
Online since: April 2011
Authors: Domenico Umbrello, Serena Di Renzo, Anshu Dhar Jayal, O.W. Dillon, I.S. Jawahir, Serafino Caruso
Introduction
The market is, nowadays, a scenario where the cost reduction and product quality factors become increasingly important to remaining competitive.
This difference in grain size was primarily due to severe plastic deformation and to the intense, localized, rapid thermal and mechanical loading to which the workpiece material was subjected during the cutting process [11-13].
In Figures 2 and 3 it is possible to evaluate the more influential parameter on grain size growth: while the constant α does not significantly affect the grain size (Figure 2), the exponent m has a stronger influence on the dynamic recrystallization (Figure 3).
“Heat-Affected Zones in Grinding Steel”, Annals of CIRP, Vol. 43(1) (1994) p. 279-282
Microstructure, Composition, Internal Stress, and Corrosion Properties”, Surface Engineering, Vol. 5(3) (1989) p. 229-233
This difference in grain size was primarily due to severe plastic deformation and to the intense, localized, rapid thermal and mechanical loading to which the workpiece material was subjected during the cutting process [11-13].
In Figures 2 and 3 it is possible to evaluate the more influential parameter on grain size growth: while the constant α does not significantly affect the grain size (Figure 2), the exponent m has a stronger influence on the dynamic recrystallization (Figure 3).
“Heat-Affected Zones in Grinding Steel”, Annals of CIRP, Vol. 43(1) (1994) p. 279-282
Microstructure, Composition, Internal Stress, and Corrosion Properties”, Surface Engineering, Vol. 5(3) (1989) p. 229-233