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Online since: March 2016
Authors: Jin Jiang He, Yue Wang, Yan Gao, Xiao Dong Xiong, Xiu Liu, Hao Zeng
This article analyzes the impact factors on the copper alloy target capability, including oxidation and strength.
Alloying method commonly used as a method to improve the material properties.
Now the research of affecting solute elements copper alloy film focused on the impact of research on the film resistivity, microstructure evolution and thermal stability and resistance to electro-migration performance [4-9].
The antioxidant properties of copper film will be improved
The precipitates enhance the mechanical properties of the copper film.
Online since: May 2011
Authors: Wei Su Weng, Zhong Yang Liu, Li Wen Wang
Pumice concrete and common concrete properties comparison is shown in Table 2.
The properties of SHSPC on the experimental research are given at list.
Table 4 Properties of SHSPCHB Single block quality [kg] Compressive strength [Mpa] Flexural strength [Mpa] Softening coefficient 15.9 16.5 10.4 0.85 Analysis of the Factors that Effect the Properties of SHSPCHB There are many factors that effect the the properties of SHSPCHB, including the materials own properties, spheroidizing and hole sealing quality, production process control, etc, also curing and using.
Lightweight aggregate gradation affects the shaping quality of hollow blocks.
The mechanical and the thermal performance of SHSPC increases obviously than NSPC.
Online since: August 2022
Authors: Giosuè Boscato, Antonella Cecchi, Carlo Rebucci, Dario Trabucco, Claudia Brito de Carvalho Bello, Daniele Baraldi
Final element models considering different restraint conditions on element nodes are taken into account to evaluate how the whole performance of the structure is affected by local connections.
Geometry and mechanical properties and load conditions.
Tables collect results in terms of frequency and mass participation factors (PF) along each direction (X, Y, Z) of the coordinate system.
Mode frequencies and participation factors of FE-1 Mode Frequency Modal Mass PF-X PF-Y PF-Z [Hz] (Engineering) [%] [%] [%] 1 3.458E+01 3.203E+01 2.608 0.141 0.000 2 3.485E+01 3.241E+01 0.000 0.000 0.558 3 3.940E+01 2.819E+01 0.101 0.049 0.000 4 4.067E+01 2.805E+01 0.000 0.000 17.273 5 4.756E+01 8.188E+00 0.675 20.085 0.009 6 5.349E+01 4.483E+01 0.000 0.002 0.001 7 5.392E+01 4.386E+01 12.535 0.001 0.000 Mode 4 40.67 Hz Mode 5 47.56 Hz Mode 7 53.92 Hz Fig. 3.
Further simulations are needed to set mechanical behavior of the elevator car frame studied.
Online since: September 2017
Authors: D.I. Kinzin, S.A. Levandovskiy, O.N. Tulupov
Moreover, a changed strain diagram – with higher roll pass design efficiency factor – will increase the roll out of foundry production defects.
Introduction Change of roll pass design can improve rolling conditions at the rolling mill – increase mill product mechanical properties, surface quality, rolling accuracy, reduce energy consumption, rolls inventory and consumption, etc. [1-6].
At the output from fourth and eight stands, new groove form has not affected maximum values of this parameter at the free surface of intermediate metal.
Improvement of PUF values is especially important when producing round bars in bundles, because there are strict requirements for their surface quality and mechanical properties, especially when testing on 66% sinking strain.
Ishmetyev, Structural-matrix models for long product rolling processes: modeling production traceability and forming consumer properties of products, Vestnik of Nosov Magnitogorsk State Technical University, 45(5) (2013) 46-50
Online since: January 2011
Authors: Lei Fang, Zhi Fei Li, Zhen Zhou Tang, Yin Fang Jiang
There are many factors influencing the springback, such as process parameters, punch parameters and sheet parameters.
Therefore, it is great significant to study those factors for the springback law of TWBs.
The springback law of parallel and perpendicular to the weld of TWBs hyperboloid shallow shell affected by blank holder force, punch string height, the difference of blank thickness was researched.
Table 1 shows the mechanical properties of the material parameters.
Fig.1 FEL mesh model Fig.2 FEA model for tailor welded blank Fig.3 The drawing and trimming model for TWBs hyperboloid shallow shell Table 1 Mechanical properties of the material parameters Material young modulus / MPa poisson ratio yield strength / MPa hardening exponent coefficient of normal anisotropy R0 R45 R90 St14 207 0.30 160 0.22 1.88 1.22 2.17 Measurement of the springback displacements In order to study the springback of the hyperboloid shallow shell, the springback needs to be measured after drawing and trimming.
Online since: July 2015
Authors: Romulus Pascu, Sergiu Valentin Galaţanu, Nicolae Faur
For the three specimens from the heat affected zone, the average value is 128 J.
In cases of heat affected zone, the average value is 124.12 MPa.
Farbas N., Kurtag A., - Simulation of thermal cycles in steel welding, 1, 3 MoDV, Machine Construction, no. 9, Bucharest, 1978 (in Romanian) [5] Pascu D.R. – The influence of structural factors on the technological characteristics and mechanical properties of low alloyed construction steel subjected to post-welding heat treatments, PhD Thesis, 1983 [6] SR EN 10028-3 – Flat products made of steels for pressure purposes – Part 3: Weldable fine grain steels, normalized
R., Studies regarding the evaluation of mechanical properties of heat affected zones in welds at macro-microstructural level, using thermal cycle simulation, Structural Integrity and Life, Vol. 4, No 1 (2014) [8] SR EN ISO 148-1 – Metallic materials -- Charpy pendulum impact test -- Part 1: Test method [9] Vinckier A.
Heat affected zone cracking in low alloy steels during stress relief heat treatments, Doc.
Online since: June 2007
Authors: Sang Yul Lee
Above 700°C, formation of porous oxides at the film surface deteriorates their mechanical properties rapidly by the.
Introduction Due to their excellent mechanical and tribological properties hard coatings, particularly transition metal nitrides, have been widely applied to cutting tools, molds and other mechanical components to increase their lifetime and performance [1].
During service at high temperatures above 973K [2], their mechanical properties are degraded rapidly by the formation of porous oxides at the film surface.
However, the mechanical properties of Al-rich film, especially high temperature impact resistance were rarely reported.
Fig. 4 shows mechanical properties of the coatings such as hardness and residual stress.
Online since: December 2023
Authors: Joel Andersson, Dilipkumar Choudary Ratnala, Shrikant Joshi
These two important manufacturing materials are deemed to have certain limitations in terms of their physical, chemical, and mechanical properties for some applications.
Development of other FGM combinations like Ti and Invar, Ti-6Al-4V and Mo, 304L, and Inconel 625 were also reported with sound mechanical properties [9].
All these events influence the resultant mechanical properties of the deposition [13].
So, all these factors should be taken into consideration while selecting the materials for metal ceramic FGMs.
Production of these metal ceramic FGMs by DED technique involves careful consideration of many factors discussed above.
Online since: August 2013
Authors: Wei Zhu, Zi Jian Cao
According to geological characteristics and the occurrence of heavy oil properties in the northern Tibetan plateau, the development feasibility studies and risk analysis were carried out .
The main factor affecting reservoir properties was theorized.
Reservoir properties and pore structure characteristics.Pores and fissures are the major reservoir.
Diagenesis and reservoir The impact of Lithogenesis on reservoir properties is great.The process of reservoir destruction or erosion was made by early cementation and compaction ,while it is good for expand the space of reservoir by dissolution and fracturing 1.Compaction and Disruption For the medium-deep reservoir ,compaction is one of the most important factors in porosity and permeability effect.
However, the reservoir properties are improved greatly by the dissolution.
Online since: July 2013
Authors: Qian Hua Xiao, Zheng Ming Yang, Xue Wu Wang
It has been found that the Nano-pore-throat takes more than 60 percent of the total pore-throat of the low permeability reservoir and it is the key factor affecting the flow capacity when the permeability is less than 0.5×10-3μm2.
And Micron-pore-throat is the key factor affecting the flow capacity of low permeability reservoir.
The nanoscale pore-throat takes more than 60 percent of the total pore-throat and microscale pore-throat takes less than 5 percent when the permeability is less than 0.5×10-3μm2, while the key factor affecting the flow capacity is sub-microscale pore-throat.
The key factor affecting the flow capacity is the sub-microscale pore-throat when the permeability is smaller than 0.5×10-3μm2, and that would be microscale pore-throat when the permeability is larger than 5×10-3μm2.
Micro-electro-mechanical-systems (MEMS) and Fluid Flows.
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