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Online since: January 2010
Authors: Christof Sommitsch, Daniel Huber, Martin Stockinger
During hot working of the recently developed nickel based alloy Allvac 718Plus
TM
softening kinetics like dynamic, metadynamic as well as static recrystallization govern the
microstructure evolution during and after hot forming and hence the final mechanical properties.
The further developed grade Allvac 718PlusTM shall enhance the high temperature properties [3] that are attributed to the combined effects of chemistry, heat treatment as well as microstructure.
For the production of turbine disks subsequently a complex multi step thermo mechanical process on a hydraulic or screw press is used in order to meet the tight geometrical, mechanical and microstructure specifications of the engine producers.
The influencing factors on the recrystallization processes are the following: While strain rate and temperature are the main affecting process conditions for DRX and MDRX, initial grain size and accumulated strain additionally govern the SRX process [8].
The recrystallization kinetics was studied by use of double-hit compression tests under isothermal conditions at constant true strain rates at a Servotest thermo-mechanical treatment simulator (TMTS).
The further developed grade Allvac 718PlusTM shall enhance the high temperature properties [3] that are attributed to the combined effects of chemistry, heat treatment as well as microstructure.
For the production of turbine disks subsequently a complex multi step thermo mechanical process on a hydraulic or screw press is used in order to meet the tight geometrical, mechanical and microstructure specifications of the engine producers.
The influencing factors on the recrystallization processes are the following: While strain rate and temperature are the main affecting process conditions for DRX and MDRX, initial grain size and accumulated strain additionally govern the SRX process [8].
The recrystallization kinetics was studied by use of double-hit compression tests under isothermal conditions at constant true strain rates at a Servotest thermo-mechanical treatment simulator (TMTS).
Online since: August 2025
Authors: Widyastuti Widyastuti, Bambang Pramujati, Hosta Ardhyananta, Ninik Safrida, Infimum Deviasi Yulamda, Johakim De Brito Dwiki Lakaseru
To obtain frangible projectiles with appropriate mechanical properties, it is necessary to understand the compressive strength of the materials that will be used as frangible projectiles.
The presence of voids can lead to a decrease in mechanical properties by disrupting the mechanical bonding between the matrix and the reinforcing agent.
The absence of voids ensures that the mechanical bonding between the reinforcing agent and the matrix is not disrupted, thereby maintaining the mechanical properties [9].
In addition to the powder percentage, another factor that affects the viscosity of the feedstock is the density of metal particles.
However, the presence of metal powders also introduced frictional resistance, leading to an increase in viscosity, which made the feedstock less stable and adversely affected its rheological properties.
The presence of voids can lead to a decrease in mechanical properties by disrupting the mechanical bonding between the matrix and the reinforcing agent.
The absence of voids ensures that the mechanical bonding between the reinforcing agent and the matrix is not disrupted, thereby maintaining the mechanical properties [9].
In addition to the powder percentage, another factor that affects the viscosity of the feedstock is the density of metal particles.
However, the presence of metal powders also introduced frictional resistance, leading to an increase in viscosity, which made the feedstock less stable and adversely affected its rheological properties.
Online since: November 2015
Authors: Amandeep Singh, Ajay Sharma, Neel Kanth Grover
The treatment enhance the properties of materials like wear resistance, hardness, dimensional stability, thermal conductivity and tool consumption rate which are recognized as a important factors in industries.
Cryogenic Cryogenic treatment has a significant role in the upgradation of tool properties used for EDM.
The procedure has been turned out to be effective in enhancing the physical and mechanical properties of the different materials such as wear, abrasion, erosion, corrosion, durability and stability [13-14].
These properties make it best suited for the applications like, press tools, blanking, forming dies and forming rolls.
Yamashita, Effects of the EDM Combined Ultrasonic Vibration on the Machining Properties of Si3N4, Materials Transactions. 51 (2010) 2113- 2120
Cryogenic Cryogenic treatment has a significant role in the upgradation of tool properties used for EDM.
The procedure has been turned out to be effective in enhancing the physical and mechanical properties of the different materials such as wear, abrasion, erosion, corrosion, durability and stability [13-14].
These properties make it best suited for the applications like, press tools, blanking, forming dies and forming rolls.
Yamashita, Effects of the EDM Combined Ultrasonic Vibration on the Machining Properties of Si3N4, Materials Transactions. 51 (2010) 2113- 2120
Online since: March 2023
Authors: I Made Londen Batan, Arif Wahjudi, Agus Sigit Pramono, Mulyadi Mulyadi, Niko Adrisenna Pontjonoto
The process of calculating heat generation rate and simulation using the Taguchi method has 4 factors, each of which has 4 levels.
The factors used in this study are tool rotation speed, welding speed, concave shoulder angle, and tool tilt angle with temperature response. on the weld joint.
Based on the research that has been done, changes in the FSW process parameters greatly affect the occurrence of defects and the mechanical strength of the welding process [4, 5].
[4] Yoo, J.T., Yoon, J.H., Min, K.J., & Lee, H.S.: Effect of Friction Stir Welding Process Parameters on Mechanical Properties and Macro Structure of Al-Li alloy.
[5] Zhou, Z., Yue, Y., Ji, S., Li, Z., & Zhang, L.: Effect of rotating speed on joint morphology and lap shear properties of stationary shoulder friction stir lap welded 6061-T6 aluminum alloy.
The factors used in this study are tool rotation speed, welding speed, concave shoulder angle, and tool tilt angle with temperature response. on the weld joint.
Based on the research that has been done, changes in the FSW process parameters greatly affect the occurrence of defects and the mechanical strength of the welding process [4, 5].
[4] Yoo, J.T., Yoon, J.H., Min, K.J., & Lee, H.S.: Effect of Friction Stir Welding Process Parameters on Mechanical Properties and Macro Structure of Al-Li alloy.
[5] Zhou, Z., Yue, Y., Ji, S., Li, Z., & Zhang, L.: Effect of rotating speed on joint morphology and lap shear properties of stationary shoulder friction stir lap welded 6061-T6 aluminum alloy.
Online since: March 2014
Authors: Oana Suciu, Liviu Bereteu, Teodora Ioanovici, Gheorghe Drăgănescu
Synthesized bone tissues must have mechanical, physiological and biological properties closer to natural bone, as much as possible.
Bioceramics are materials which fulfill these conditions, being biocompatible with mechanical strength similar to bone.
In order to improve mechanical properties and biological compatibility hydroxyapatite is doped with different compounds, mainly chemical elements.
The modulus of elasticity E is a material property, that describes its stiffness and is therefore one of the most important properties of solid materials.
Although, analyzing the two sample sets it was found a decrease of modulus of elasticity for those who stayed in SBF, but not so important as to affect its mechanical qualities.
Bioceramics are materials which fulfill these conditions, being biocompatible with mechanical strength similar to bone.
In order to improve mechanical properties and biological compatibility hydroxyapatite is doped with different compounds, mainly chemical elements.
The modulus of elasticity E is a material property, that describes its stiffness and is therefore one of the most important properties of solid materials.
Although, analyzing the two sample sets it was found a decrease of modulus of elasticity for those who stayed in SBF, but not so important as to affect its mechanical qualities.
Online since: September 2011
Authors: Neela Deshpande, S.S Kulkarni
The strength characteristics of concrete are not affected by the quality of recycled aggregate at higher water cement ratio, it was only affected when the water cement ratio is low.
Results and Discussions: The properties of materials especially the aggregates were driving force towards designing the mix.
These two observations contribute towards better packing properties in concrete and further decrease in pores.
Density of concrete is another important factor.
The physical and Mechanical properties of Recycled Concrete aggregates are important factors governing the strength characteristics of the concrete.
Results and Discussions: The properties of materials especially the aggregates were driving force towards designing the mix.
These two observations contribute towards better packing properties in concrete and further decrease in pores.
Density of concrete is another important factor.
The physical and Mechanical properties of Recycled Concrete aggregates are important factors governing the strength characteristics of the concrete.
Online since: July 2011
Authors: Hua Jun Wang, Yu Zhu Sun, Yan Zhao Wu, Hua Chang Wang
FE model of hot forging process under mechanical press was build based on Deform-2D, temperature and stress field of homogeneous hot forging die and FGM surface cladding hot forging die under mechanical press were compared.
High stress in the surface of hot forging die impression can become a important factor influencing hot forging die failure[2].
Different forging equipment has different load property and great different load distribution in hot forging die.
Workpiece material was steel 1035, die matrix was H13 (4Cr5MoSiV1); workpiece temperature was 1100˚C, preheating temperature of die was 300˚C, environment temperature was 20˚C; friction factor between workpiece and die was 0.3, Thermal conductivity was 11W/(m·˚C); forging equipment was 2000T mechanical press and upper die stroke was 16mm.
Thermal penetration depth of I zone indicated: die heat-affected zones were 2-3mm under impression surface during forging process.
High stress in the surface of hot forging die impression can become a important factor influencing hot forging die failure[2].
Different forging equipment has different load property and great different load distribution in hot forging die.
Workpiece material was steel 1035, die matrix was H13 (4Cr5MoSiV1); workpiece temperature was 1100˚C, preheating temperature of die was 300˚C, environment temperature was 20˚C; friction factor between workpiece and die was 0.3, Thermal conductivity was 11W/(m·˚C); forging equipment was 2000T mechanical press and upper die stroke was 16mm.
Thermal penetration depth of I zone indicated: die heat-affected zones were 2-3mm under impression surface during forging process.
Online since: July 2011
Authors: Min Hong Xu, Pei Song Tang, Hai Feng Chen, Feng Cao
The testing results showed that paraffin was absorbed into the holes and cracks of EP, and CBBP had not linear change of various properties versus amount of cement or paraffin.
Among the discussed PCMs, paraffin had desirable properties, such as high heat-fusion, little or no supercooling, thermal and chemical stability [3].
As shown in Fig. 2(b), adding the organic paraffin was negatively affected on the mechanical performance of cement bricks[3].
Taking into account the cost of cement, water absorption was not a major factor.
The effect of cement was more important on the mechanical properties, as shown in Fig. 3(b).
Among the discussed PCMs, paraffin had desirable properties, such as high heat-fusion, little or no supercooling, thermal and chemical stability [3].
As shown in Fig. 2(b), adding the organic paraffin was negatively affected on the mechanical performance of cement bricks[3].
Taking into account the cost of cement, water absorption was not a major factor.
The effect of cement was more important on the mechanical properties, as shown in Fig. 3(b).
Online since: June 2015
Authors: Xiao Hui Song, Hua Dong Zhao, Ji Bin Liu
However, until now most previous studies have focused on the dramatic contact resistance reduction to demonstrate the effectiveness of the bonding methods without paying attention to the effect of the mechanical properties of the interfacial configuration.
Computer simulations provide powerful methods to investigate the structural and dynamical properties of the interfaces, which otherwise are very difficult to study by means of experiments.
To identify factors affecting the bonding strength and failure modes, bonding processes under various temperatures are considered.
Debonding process In order to examine the mechanical properties and the failure modes during debonding process, tensile loading is applied at 300 K by fixing one end of the Ni slab and moving three layers of C atoms in the Z direction, as shown in Fig. 4.
The temperature is a key factor to increase the contact length.
Computer simulations provide powerful methods to investigate the structural and dynamical properties of the interfaces, which otherwise are very difficult to study by means of experiments.
To identify factors affecting the bonding strength and failure modes, bonding processes under various temperatures are considered.
Debonding process In order to examine the mechanical properties and the failure modes during debonding process, tensile loading is applied at 300 K by fixing one end of the Ni slab and moving three layers of C atoms in the Z direction, as shown in Fig. 4.
The temperature is a key factor to increase the contact length.
Online since: September 2011
Authors: R. Ebner, Thomas Antretter, Werner Ecker, Peter Raninger, M. Leindl
The crack growth rate and the length at which the cracks stop growing are also influenced by the thermo-physical and mechanical properties of the die material.
The factor 10 results from meshing considerations. 3.3 Crack deflection.
Still, the cracks will arrange dependent on the sequence of initiation which largely affects the propagation rates of the cracks in the system and can cause a buffering effect.
Effect of material properties on the thermo-mechanical loading and damage of pressure casting dies – a numerical study.
In Tool Steels – Deciding Factor in Worldwide Production.
The factor 10 results from meshing considerations. 3.3 Crack deflection.
Still, the cracks will arrange dependent on the sequence of initiation which largely affects the propagation rates of the cracks in the system and can cause a buffering effect.
Effect of material properties on the thermo-mechanical loading and damage of pressure casting dies – a numerical study.
In Tool Steels – Deciding Factor in Worldwide Production.