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Online since: December 2013
Authors: Viktor Konashkov, Arkadi Povodator, Vladimir Tsepelev, Vladimir V. Vyukhin, Ann Latipova
Melt Time-Temperature Treatment Affecting the Amorphous Ribbons’ Properties of the HTS-42 Solder
Vladimir Tsepelev, Viktor Konashkov, Vladimir Vyukhin, Arkadi Povodator, Ann Latipova
Boris Yeltzin Ural Federal University, Ekaterinburg, 620002, Russia
v.s.tsepelev@ustu.ru
Keywords: Kinematic viscosity; Magnetic susceptibility; Electrical resistivity; Critical temperature; Experimental melting; High speed melting; Amorphous ribbon; Ultimate strength; Soldered joint
Abstract.
The structure of ribbons produced by hardening from the melt of different temperatures is determined by two factors.
The joints, made by amorphous solders produced using the proposed technology, are of high quality mechanical properties, corrosive resistance and heat resistance.
Improving the mechanical properties of soldered joints made from precipitation hardened alloys with the durability degree of sв = 1000 МPа is ensured by their further heat treatment.
The joints made by the amorphous solder which had been produced by the technology proposed were characterized by a high level of mechanical properties, corrosion resistance and heat resistance.
The structure of ribbons produced by hardening from the melt of different temperatures is determined by two factors.
The joints, made by amorphous solders produced using the proposed technology, are of high quality mechanical properties, corrosive resistance and heat resistance.
Improving the mechanical properties of soldered joints made from precipitation hardened alloys with the durability degree of sв = 1000 МPа is ensured by their further heat treatment.
The joints made by the amorphous solder which had been produced by the technology proposed were characterized by a high level of mechanical properties, corrosion resistance and heat resistance.
Online since: March 2006
Authors: I.H.S.C. Metselaar, Iskandar Idris Yaacob, Koay Mei Hyie
Four electromagnetic properties were
measured.
Density and the presence of the porosity will greatly affect the electromagnetic properties of MgCuZn ferrites.
The quality factor is affected by grain size, porosity, chemical composition and the presence of second phase inclusions [4.
Hence, any alteration in grain structure and porosity would affect the loss factor.
High ZnO content is associated with better electromagnetic properties.
Density and the presence of the porosity will greatly affect the electromagnetic properties of MgCuZn ferrites.
The quality factor is affected by grain size, porosity, chemical composition and the presence of second phase inclusions [4.
Hence, any alteration in grain structure and porosity would affect the loss factor.
High ZnO content is associated with better electromagnetic properties.
Online since: July 2012
Authors: Zi Tian Fan, Chun Sheng Ye, Huo Ping Zhao
Both wider and narrower particle size distribution adversely affects the properties of printed specimens.
The purpose of the present work was to study the effect of particle size distribution on the physical and mechanical properties of the fabricated sand molds by 3DP process.
It is well known that the physical properties of sand mold including gas evolution and air permeability affect the casting quality.
However, they are different from the trends of mechanical properties which increased firstly and then decreased.
The particle size distribution affected the sand powder packing rate and thus the properties of printed specimens.
The purpose of the present work was to study the effect of particle size distribution on the physical and mechanical properties of the fabricated sand molds by 3DP process.
It is well known that the physical properties of sand mold including gas evolution and air permeability affect the casting quality.
However, they are different from the trends of mechanical properties which increased firstly and then decreased.
The particle size distribution affected the sand powder packing rate and thus the properties of printed specimens.
Online since: August 2011
Authors: Wan Lin Guo, Liang He
The charts which is aimed at the selection of materials based on their properties, have accessed to a significant number of mechanical, thermal, optical, electric and other properties.
Several important assessment factors were specified in each index.
A set of assessment factors C was specified, where C={Cj}, and j=1,2,…,n.
According to different working conditions and requirements, a set of assessment factors was obtained.
Introducing a novel method for materials selection in mechanical design using Z-transformation in statistics for normalization of material properties[J].
Several important assessment factors were specified in each index.
A set of assessment factors C was specified, where C={Cj}, and j=1,2,…,n.
According to different working conditions and requirements, a set of assessment factors was obtained.
Introducing a novel method for materials selection in mechanical design using Z-transformation in statistics for normalization of material properties[J].
Online since: October 2014
Authors: Zheng Gen Liao, Liang Shan Ming, Juan Luo, Qie Ying Jiang, Zhi Wei Xiong, Rong Gui Zeng, Zhe Li
Compaction properties.
Flow properties.
Therefore the properties of aggregation over 2.0 mm is not within the granule properties measurement range.
A large angle of repose could create a reduction in the fill rate and thereby affecting the yield of granule [7].
In both granulations, particles’ movement was subjected to mechanical agitation and was less affected by gravity.
Flow properties.
Therefore the properties of aggregation over 2.0 mm is not within the granule properties measurement range.
A large angle of repose could create a reduction in the fill rate and thereby affecting the yield of granule [7].
In both granulations, particles’ movement was subjected to mechanical agitation and was less affected by gravity.
Online since: July 2015
Authors: Claudio Giardini, Gianluca D'Urso
A study was carried out to evaluate how the Friction Stir Spot Welding (FSSW) process parameters affect the temperature distribution in the welding region, the welding forces and the mechanical properties of the joints.
Aim of these experiments was to evaluate how the welding process parameters affect the thermal distribution in the welding region, the welding forces and the mechanical properties of the joints.
The mechanical properties of the joints were evaluated by means of shear tests.
A general good repeatability was found in all cases and all the considered factors (S, F and Z) have an influence on the mechanical properties of the joints in terms of shear resistance.
Hook formation and mechanical properties in AZ31 friction stir spot welds, J.
Aim of these experiments was to evaluate how the welding process parameters affect the thermal distribution in the welding region, the welding forces and the mechanical properties of the joints.
The mechanical properties of the joints were evaluated by means of shear tests.
A general good repeatability was found in all cases and all the considered factors (S, F and Z) have an influence on the mechanical properties of the joints in terms of shear resistance.
Hook formation and mechanical properties in AZ31 friction stir spot welds, J.
Online since: October 2011
Authors: S. Izman, Amirreza Shayganpour, M.H. Idris, Hassan Jafari
Gunasegaram et al. [6] used a five-factor, 2-level, 1/2 fractional factorial designs with 4 centre points to identify critical factors affecting shrinkage porosity in permanent mould casting.
Porosity has an adverse effect not only on the mechanical properties, but also on the surface quality of a cast product [9].
In summary, reducing porosity and fold defects will improve production efficiency, mechanical properties, and marketability of castings.
Experiment Details An Ishikawa cause–effect diagram in Fig. 1 was constructed to summarize the factors affecting the quality of the LFC castings in terms of porosity.
Farnsworth: Identification of critical factors affecting shrinkage porosity in permanent mold casting using numerical simulations based on design of experiments, J.
Porosity has an adverse effect not only on the mechanical properties, but also on the surface quality of a cast product [9].
In summary, reducing porosity and fold defects will improve production efficiency, mechanical properties, and marketability of castings.
Experiment Details An Ishikawa cause–effect diagram in Fig. 1 was constructed to summarize the factors affecting the quality of the LFC castings in terms of porosity.
Farnsworth: Identification of critical factors affecting shrinkage porosity in permanent mold casting using numerical simulations based on design of experiments, J.
Online since: March 2007
Authors: Edith Mäder, Rosemarie Plonka, Shang Lin Gao
Surface coating is efficiently to protect the fibre
surface against alkali/acidic/moisture and thus to improve mechanical properties of the coated fibre.
However, an effective utilization of exceptional high mechanical properties of nanotube in composites is a long standing problem.
Because the critical flaws which limit the strength of fibres are located at the surface, the fibre fracture behaviour is strongly affected by the variation of coating properties.
Potential mechanisms of the mechanical property improvement include the contributions of different factors.
The significant increase in adhesion strength is attributed to the mechanical properties and thickness of the hybrid nanocoatings, influencing interface integration and stress concentration.
However, an effective utilization of exceptional high mechanical properties of nanotube in composites is a long standing problem.
Because the critical flaws which limit the strength of fibres are located at the surface, the fibre fracture behaviour is strongly affected by the variation of coating properties.
Potential mechanisms of the mechanical property improvement include the contributions of different factors.
The significant increase in adhesion strength is attributed to the mechanical properties and thickness of the hybrid nanocoatings, influencing interface integration and stress concentration.
Online since: July 2013
Authors: William D. Griffiths, Nick R. Green, Yang Yue
Modelling of the Effects of Entrainment Defects on Mechanical Properties in a Cast Al-Si-Mg Alloy
Y.
Entrainment defects such as double oxide films and entrapped bubbles occur frequently in aluminium alloy castings during the mould-filling process, and are very detrimental to both mechanical properties, and reproducibility of casting properties.
In addition, a particle “stickiness” factor with the mould wall was tested in the simulation to try to understand the influence of particle properties on the modelling results.
These results suggest that the predicted particle counts could be used as a quantitative indicator of the mechanical properties of castings containing entrainment defects, although at the present stage it was found that the tensile strength could not be determined from the number of particles predicted, and a better understanding of the relationship between the predicted particles (i.e., quantity of defects) and casting properties is required.
The method is still under development, and several factors limited the accuracy of the model.
Entrainment defects such as double oxide films and entrapped bubbles occur frequently in aluminium alloy castings during the mould-filling process, and are very detrimental to both mechanical properties, and reproducibility of casting properties.
In addition, a particle “stickiness” factor with the mould wall was tested in the simulation to try to understand the influence of particle properties on the modelling results.
These results suggest that the predicted particle counts could be used as a quantitative indicator of the mechanical properties of castings containing entrainment defects, although at the present stage it was found that the tensile strength could not be determined from the number of particles predicted, and a better understanding of the relationship between the predicted particles (i.e., quantity of defects) and casting properties is required.
The method is still under development, and several factors limited the accuracy of the model.
Online since: June 2013
Authors: Janis Zicans, Remo Merijs Meri, Ingars Reinholds, Agnese Grigalovica, Valdis Kalkis
However, unmodified blends are thermodynamically incompatible that negatively affects properties of the material [2].
Results and discussion Mechanical properties.
Apart from incompatibility this could be additional factor determining low mechanical properties of PP/NBR blends.
Mechanical properties of the investigated blends are especially affected at elastomer contents above 50 wt. %, especially for PP/NBR blends.
Shafei, A review on mechanical properties and applications of chlorinated polyethylene, Adv.
Results and discussion Mechanical properties.
Apart from incompatibility this could be additional factor determining low mechanical properties of PP/NBR blends.
Mechanical properties of the investigated blends are especially affected at elastomer contents above 50 wt. %, especially for PP/NBR blends.
Shafei, A review on mechanical properties and applications of chlorinated polyethylene, Adv.