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Online since: September 2008
Authors: John H. Perepezko, F. Rioult, R. Sakidja
Mo-Si-B alloys are attractive due to their high temperature mechanical properties and
high melting temperature.
Three phase alloys comprised of Mo (solid solution (ss)), T2 (Mo5SiB2) and Mo3Si offer favorable combinations of high temperature mechanical properties and oxidation resistance due to the formation of an adherent borosilicate layer during high temperature oxidation [3].
While there are several factors influencing the oxidation resistance that have been identified, it is clear that the B to Si ratio of the alloy is the dominant factor.
A clear understanding of the factors controlling reproducible coating synthesis and processing is critical for high temperature applications.
Handbook of glass properties. 1986, Academic Press: Orlando, FL
Three phase alloys comprised of Mo (solid solution (ss)), T2 (Mo5SiB2) and Mo3Si offer favorable combinations of high temperature mechanical properties and oxidation resistance due to the formation of an adherent borosilicate layer during high temperature oxidation [3].
While there are several factors influencing the oxidation resistance that have been identified, it is clear that the B to Si ratio of the alloy is the dominant factor.
A clear understanding of the factors controlling reproducible coating synthesis and processing is critical for high temperature applications.
Handbook of glass properties. 1986, Academic Press: Orlando, FL
Online since: December 2014
Authors: Lin Gang Jia
Aggregate accounts for a larger proportion, as the object of binder cementation, and its physical and mechanical properties have an important effect on the properties of similar material.
Excavation and filling drawing pace is 10m, mining thickness 3.5m, by changing the material properties,that the goaf was filled, after every excavation step in the model it may calculate the subsidence maximum,which determine next filling body height, Then Stepwise excavating, filling and excavating, iterative calculation .
After filling in goaf, the stress of the roof, the front and rear wall of goaf maintain the initial stress state of which the coal has been excavated.Along with the advancing of mining excavation to the right, the second excavate step, new goaf on the right side of the coal wall vertical stress concentration is 7.21MPa, the concentration factor is 1.68, while the left side filling regional stress is 3.72MPa, that it is shows the face is affected by the mining , stress of surrounding rock has advance.
To finish excavation, the pressure of the front coal wall of goaf is 7.63MPa, the concentration factor was 1.78.
Preliminary test on mechanical properties of paste filling material[J].
Excavation and filling drawing pace is 10m, mining thickness 3.5m, by changing the material properties,that the goaf was filled, after every excavation step in the model it may calculate the subsidence maximum,which determine next filling body height, Then Stepwise excavating, filling and excavating, iterative calculation .
After filling in goaf, the stress of the roof, the front and rear wall of goaf maintain the initial stress state of which the coal has been excavated.Along with the advancing of mining excavation to the right, the second excavate step, new goaf on the right side of the coal wall vertical stress concentration is 7.21MPa, the concentration factor is 1.68, while the left side filling regional stress is 3.72MPa, that it is shows the face is affected by the mining , stress of surrounding rock has advance.
To finish excavation, the pressure of the front coal wall of goaf is 7.63MPa, the concentration factor was 1.78.
Preliminary test on mechanical properties of paste filling material[J].
Online since: September 2013
Authors: Zong Yu Chang, Yuan Dai, Zhong Qiang Zheng, Da Xiang Gao, Xin Lei Zhao
Tension force is an important factor to affect the motion of mooring system in deployment.According to the space discrete model,the tension force between node and node can be determined by the relative distance between adjacent nodes and stiffness of cable.
The unilateral boundary condition at the sea floor is modeled as an elastic foundation with linear stiffness and damping properties.
The impact force is defined as the displacement, velocity between anchor and seafloor, and the properties of sea soil.
McDonald, T DePauw, Shipboard Buoy Cable Deployment System In ADAMS, Mechanical Dynamics Inc
[8] Using ADAMS/View, Mechanical Dynamics Inc
The unilateral boundary condition at the sea floor is modeled as an elastic foundation with linear stiffness and damping properties.
The impact force is defined as the displacement, velocity between anchor and seafloor, and the properties of sea soil.
McDonald, T DePauw, Shipboard Buoy Cable Deployment System In ADAMS, Mechanical Dynamics Inc
[8] Using ADAMS/View, Mechanical Dynamics Inc
Online since: September 2012
Authors: Keng Soon Woon, Shigeyuki Kanno, Kui Liu
This could be one of the biggest factors which governs the stability and accuracy of the process.
The mechanical properties of the Inconel-718 workpiece are summarized in Table 1.
Mechanical Properties of Inconel-718 Workpiece Yield Strength, 0.2% Tensile Strength Hardness Elongation Red. of Area 995Mpa 1231MPa 38-40HRc 29.7% 45.9% The holes were drilled progressively with a new set of gun drills with K15 cemented carbide drill tips, with uniform geometries and bearing pads configuration in three different lengths of 1100mm, 1600mm and 2100mm.
Deviation A Outer approach angle [°] 30.06 31.12 28.94 2.18 B Inner approach angle [°] 20.09 20.54 19.07 1.47 C Outer cutting land [µm] 2285.30 2208.43 2125.54 159.76 D Inner cutting land [µm] 2317.58 2342.64 2279.65 62.99 E Drill apex offset [µm] 1993.17 2004.40 1835.23 169.17 Summary The stability and accuracy of high aspect ratio gundrilling are greatly affected by the consistency of the critical drill geometries.
Random human errors are inevitable in the exhaustive course of drilling and thus the hole straightness accuracy produced will be adversely affected.
The mechanical properties of the Inconel-718 workpiece are summarized in Table 1.
Mechanical Properties of Inconel-718 Workpiece Yield Strength, 0.2% Tensile Strength Hardness Elongation Red. of Area 995Mpa 1231MPa 38-40HRc 29.7% 45.9% The holes were drilled progressively with a new set of gun drills with K15 cemented carbide drill tips, with uniform geometries and bearing pads configuration in three different lengths of 1100mm, 1600mm and 2100mm.
Deviation A Outer approach angle [°] 30.06 31.12 28.94 2.18 B Inner approach angle [°] 20.09 20.54 19.07 1.47 C Outer cutting land [µm] 2285.30 2208.43 2125.54 159.76 D Inner cutting land [µm] 2317.58 2342.64 2279.65 62.99 E Drill apex offset [µm] 1993.17 2004.40 1835.23 169.17 Summary The stability and accuracy of high aspect ratio gundrilling are greatly affected by the consistency of the critical drill geometries.
Random human errors are inevitable in the exhaustive course of drilling and thus the hole straightness accuracy produced will be adversely affected.
Online since: July 2014
Authors: D.S. Manoj Abraham, H. Kanagasabapathy, Richu John, Muthu Yasar, Shobin Paul
Evaluation of corrosion behaviour for aluminium alloy 7075 in 5% NaCl solution under slightly varying temperature
D.S.Manoj Abraham1, a H.Kanagasabapathy2,b Richu John3,c
Muthu Yasar4,c Shobin Paul5,c
1Mechanical Engineering Department, Ponjesly College of Engineering, Nagercoil,Tamilnadu,India,Pin:629003,Tel:+91-9944356354
2Mechanical Engineering Department,National Engineering College, Kovilpatti, Tamilnadu, India, Pin: 628503, Tel:+91-9442535810
3 Mechanical Engineering, Ponjesly College of Engineering,Nagercoil, Tamilnadu, India,
Pin: 629003, Tel:+91-9809914687
4Mechanical Engineering, Ponjesly College of Engineering, Nagercoil, Tamilnadu, India,
Pin: 629003, Tel:+91-9578517476
5Mechanical Enineering, Ponjesly College of Engineering, Nagercoil, Tamilnadu, India,
Pin: 629003, Tel:+91-8547829660
amanoth_333@rediffmail.com, bhariram64@yahoo.co.in, cricjonu@gmail.com
Key words: Al7075 T6, salt mist test, penetration rate
Abstract
The main focus
Most structural alloys corrode simply from exposure to atmospheric moisture, but the process can be greatly affected by exposure to certain other substances.
The factors that affect the stability of the aluminium oxide and thereby cause corrosion concists, the oxide is not stable in alkaline (pH > 9) or acidic (pH < 4) environments.
Weilage.B, Wank.A, Pokhmurska, H.Podlesak, Corrosion properties of SIC reinforced surface layers of aluminium alloy by laser beam melt injection, Corrosion 2005 Warsaw [7].
Bodunrin,Mechanical Properties and Corrosion Behaviour of Aluminium Hybrid Composites Reinforced with Silicon Carbideand Bamboo Leaf Ash, Tribology in Industry, Vol. 35, No.1(2013) 25‐35 [9]. http://www.hsctut.materials.unsw.edu.au [10]. www.npl.co.uk
Most structural alloys corrode simply from exposure to atmospheric moisture, but the process can be greatly affected by exposure to certain other substances.
The factors that affect the stability of the aluminium oxide and thereby cause corrosion concists, the oxide is not stable in alkaline (pH > 9) or acidic (pH < 4) environments.
Weilage.B, Wank.A, Pokhmurska, H.Podlesak, Corrosion properties of SIC reinforced surface layers of aluminium alloy by laser beam melt injection, Corrosion 2005 Warsaw [7].
Bodunrin,Mechanical Properties and Corrosion Behaviour of Aluminium Hybrid Composites Reinforced with Silicon Carbideand Bamboo Leaf Ash, Tribology in Industry, Vol. 35, No.1(2013) 25‐35 [9]. http://www.hsctut.materials.unsw.edu.au [10]. www.npl.co.uk
Online since: June 2009
Authors: Suryendra D. Sherman, Arjan Quist, Paul Hansma
Understanding of what affects stickiness is critical.
Using atomic force and light microscopy, we examined adhesive properties of wood, tape and plastic.
The same cantilever was used to compare mechanical properties of all materials.
Lal. (2004) Elasticity and adhesion force mapping reveals real-time clustering of growth factor receptors and associated changes in local cellular rheological properties.
J. (2008) Orthopedic nano diamond coatings: Control of surface properties and their impact on osteoblast adhesion and proliferation.
Using atomic force and light microscopy, we examined adhesive properties of wood, tape and plastic.
The same cantilever was used to compare mechanical properties of all materials.
Lal. (2004) Elasticity and adhesion force mapping reveals real-time clustering of growth factor receptors and associated changes in local cellular rheological properties.
J. (2008) Orthopedic nano diamond coatings: Control of surface properties and their impact on osteoblast adhesion and proliferation.
Online since: November 2014
Authors: Adrien Chaussinand
Subsequently a dynamic thermal model was created, using the extracted thermal properties, by means of Pleiades+Comfie software.
The regulatory air renewal is ensured by a mechanical ventilation double flow required for obtaining the label.
Controversy of straw thermal characteristics Thermal conductivity and capacity of straw If today many materials have well-defined properties, extensive research on straw has shown that straw characteristics vary a lot depending on publications and tests.
Many factors can affect the thermal straw wall resistance.
For a straw, these factors are the type of straw employed, the water content, the density of the bale but also the void between each bale, the density of the coating into the interstices, the orientation of fibers, the nature and thickness of the coatings.
The regulatory air renewal is ensured by a mechanical ventilation double flow required for obtaining the label.
Controversy of straw thermal characteristics Thermal conductivity and capacity of straw If today many materials have well-defined properties, extensive research on straw has shown that straw characteristics vary a lot depending on publications and tests.
Many factors can affect the thermal straw wall resistance.
For a straw, these factors are the type of straw employed, the water content, the density of the bale but also the void between each bale, the density of the coating into the interstices, the orientation of fibers, the nature and thickness of the coatings.
Online since: August 2011
Authors: Xiao Yu Gu, Philippe Velex
Finally, the influence of planet position errors at high speeds is analysed and it is shown that dynamic effects may substantially affect the load sharing properties in planetary gears.
Fig. 4 shows the load distribution factors of the 4-planet example defined in Table 1 for a range of torques and tangential pin-hole errors on planet #1.
Singh: Journal of Mechanical Design Vol. 131 (2009), p. 021007 [4] V.
Singh: Journal of Mechanical Design Vol. 130 (2008), p. 041701 [6] V.
Becquerelle: Journal of Mechanical Design Vol. 129 (2007), p. 95
Fig. 4 shows the load distribution factors of the 4-planet example defined in Table 1 for a range of torques and tangential pin-hole errors on planet #1.
Singh: Journal of Mechanical Design Vol. 131 (2009), p. 021007 [4] V.
Singh: Journal of Mechanical Design Vol. 130 (2008), p. 041701 [6] V.
Becquerelle: Journal of Mechanical Design Vol. 129 (2007), p. 95
Online since: March 2014
Authors: Kjell Simonsson, Johan Moverare, Daniel Leidermark, Mikael Segersäll
TMF tests were performed in both IP and OP for varying mechanical
strain ranges in the [001] crystallographic direction until TMF crack initiation was obtained.
Introduction In the hot sections of gas turbines the components are often made of single-crystal nickel-base superalloys to withstand the high temperatures while still maintaining good mechanical properties, thus achieving a good efficiency of the gas turbine and in turn reducing pollution [1, 2].
Five test specimens were tested at different mechanical strain ranges (∆εmech), two in both IP and OP loading and the last one in only IP loading, where an extensometer with gauge length of 12.5 mm was used.
where Gr is the slip resistance on the plane, and has the same value for all slip systems, and the following macroscopic equivalent stresses were employed σαe = � �ταpb� � + κ1 |ταcb| + κ2 |ταsb| + κ3ταpe + κ4ταse + κ5σαpn (3) where the first shear stress ταpb is the Schmid stress and the following five are non-Schmid stresses, and the κ1 through κ5 are weight factors that describe how the non-Schmid stresses affect the yield limit.
The weight factors and Gr are temperature dependent parameters, which are determined from experimentally obtained yield data.
Introduction In the hot sections of gas turbines the components are often made of single-crystal nickel-base superalloys to withstand the high temperatures while still maintaining good mechanical properties, thus achieving a good efficiency of the gas turbine and in turn reducing pollution [1, 2].
Five test specimens were tested at different mechanical strain ranges (∆εmech), two in both IP and OP loading and the last one in only IP loading, where an extensometer with gauge length of 12.5 mm was used.
where Gr is the slip resistance on the plane, and has the same value for all slip systems, and the following macroscopic equivalent stresses were employed σαe = � �ταpb� � + κ1 |ταcb| + κ2 |ταsb| + κ3ταpe + κ4ταse + κ5σαpn (3) where the first shear stress ταpb is the Schmid stress and the following five are non-Schmid stresses, and the κ1 through κ5 are weight factors that describe how the non-Schmid stresses affect the yield limit.
The weight factors and Gr are temperature dependent parameters, which are determined from experimentally obtained yield data.
Online since: November 2022
Authors: T.R. Vijayaram, M. Muthumalai, K. Arunprasath, S. Kavitha
Liu et al., “Microstructural evolution and mechanical properties of deep cryogenic treated Cu–Al–Si alloy fabricated by Cold Metal Transfer (CMT) process,” Mater.
Vafaei, “Influence of cryogenic thermal treatment on mechanical properties of an Al–Cu–Mg alloy,” Mater.
Liu et al., “Microstructural evolution and mechanical properties of deep cryogenic treated Cu–Al–Si alloy fabricated by Cold Metal Transfer (CMT) process,” Mater.
Vafaei, “Influence of cryogenic thermal treatment on mechanical properties of an Al–Cu–Mg alloy,” Mater.
He, “Effects of contact body temperature and holding time on the microstructure and mechanical properties of 7075 aluminum alloy in contact solid solution treatment,” J.
Vafaei, “Influence of cryogenic thermal treatment on mechanical properties of an Al–Cu–Mg alloy,” Mater.
Liu et al., “Microstructural evolution and mechanical properties of deep cryogenic treated Cu–Al–Si alloy fabricated by Cold Metal Transfer (CMT) process,” Mater.
Vafaei, “Influence of cryogenic thermal treatment on mechanical properties of an Al–Cu–Mg alloy,” Mater.
He, “Effects of contact body temperature and holding time on the microstructure and mechanical properties of 7075 aluminum alloy in contact solid solution treatment,” J.