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Online since: January 2012
Authors: Hiroshi Numakura, Naoki Yoshinaga, Kohsaku Ushioda, K. Honda, K. Nakano, T. Yokoi, D. Maeda
Quantitative Analysis of Carbon in Ferrite in Dual-phase Steels by Mechanical Loss Measurements K.
An additional factor is the amount of carbon in solid-solution in a phase, which influences the yield strength and, more importantly, strain-ageing behaviour.
Mechanical Loss.
Because the two values turned out to agree with each other within experimental error in every case, the unexpected differences in the peak positions may not seriously affect the evaluation of the relaxation strength.
Honeycombe, Steels – Microstructure and Properties, Third ed., Butterworth-Heinemann, Oxford, 2006, Chapter 10
Online since: October 2014
Authors: Krzysztof Jamroziak, Wiesław Jargulinski, Stanislaw Piesiak
Skalnikow Street, No. 6b, 59-101, Polkowice, Poland akrzysztof.jamroziak@wso.wroc.pl, bwieslaw.jargulinski@wso.wroc.pl, cs.piesiak@dwspit.pl * Corresponding author: Krzysztof Jamroziak, krzysztof.jamroziak@wso.wroc.pl Keywords: properties, electrical properties, adhesion, double electric layer, absorption hydrogen Abstract.
Those processes are caused by generation of electricity in double layer (EDL), affecting the electrode potential shift in positive direction.
The increased adhesion forces on the metal substrate is the another factor, which translates into increased strength of fatigue.
Wlodarczyk, Influence of adsorbed hydrogen on the mechanical properties of the aluminum alloy construction, Ph.D. thesis, Faculty of Mechanical Engineering, University of Technology in Opole.
Waynman, Moder state of the problem of hydrogen embrittlement of metal of TPP thermo-mechanical equipment of pre-and overcritical parameters, 3rd International Conference, Fracture mechanics of materials and structural integrity, Lviv 2000, pp. 445-456
Online since: May 2021
Authors: Eydar Tey, Zulkarnain Zainal, Lim Kean Pah, Ismayadi Ismail
The effects of mechanical agitation of electrodeposition bath on Al2O3 particles dispersion and particles embedment were studied.
The Cr-Al2O3 nanocomposite samples were subjected to different tests to characterize their surface morphology, crystalline structure and mechanical properties.
The incorporation of Al2O3 particles does not affect the crystal structure of the chromium matrix.
The decreasing trend of the weight percent of alumina is due the collision factor [8].
Ger, Improve the mechanical properties and wear resistance of Cr-C thin films by adding Al2O3 particles, Surf.
Online since: July 2014
Authors: Robert Černý, Jiří Maděra, Miloš Jerman, Václav Kočí
The optimality of composition of zeolite concrete building envelopes can be judged from many points of view, e. g., service life, mechanical properties, or salt resistance.
Material properties [5] of analyzed concretes are summarized in Table 1.
Computational Results and Discussion Service life of building materials is affected by many factors.
The differences were caused by the type of concrete and its hygric properties in particular.
Tsimas, Influence of quicklime addition on the mechanical properties and hydration degree of blended cements containing different fly ashes, Construction and Building Materials 22 (2008) 1191-1200
Online since: May 2009
Authors: Ming Chen, Qing Long An, X.Y. Wang, Yun Shan Zhang, H. Xu
Introduction With the development of oil-gas exploitation technology and more complicated geological conditions for casings working, such as corrosive environment, casings with high comprehensive mechanical properties are needed in the oil-gas industry [1, 2]. 2Cr13 is a high-strength and high-Cr stainless steel, which is qualified for the severe working environment as casings material.
Taking into account the mechanical properties of 2Cr13 (Table 2) and the style of tools wear, cutting speed of 100m/min, with a depth of cut of 0.3mm were used.
Table 1 Parameters of the two cutters Type Coat thickness(µm) Rake angle(°) Relief angle(°) Corner radius(mm) T1 3 12 3 0.08 T2 3 0 6 0.12 Table 2 Mechanical properties of 2Cr13 Parameter Value Unit Yield strength 665-758 [N/mm 2] Tensile strength 724 [N/mm 2] Coefficient of extension ≥15 [%] Hardness ≤25.4 [HRC] Finite Element Model Finite Element Mesh and Boundary Conditions.
This model is suitable for modeling cases with high strain, strain rate, strain hardening, and non-linear material properties, which represent the main numerical challenges when modeling metal cutting.
In this study, the key factors that affect the temperature are rake angle and corner radius.
Online since: June 2017
Authors: Toshiyuki Sunaba, Susumu Hirano, Tadao Ishihara
The evolved hydrogen atom might be affect to SCC mechanism.
Experimental Procedures The chemical compositions and mechanical properties used in this study are provided in Table 1.
Table 1 Chemical Composition (mass%) and Mechanical properties (MPa) C Cr Mo Ni YS TS 15Cr 0.03 14.7 1.92 6.22 987 1039 13Cr 0.19 12.5 0.01 0.09 585 760 Test specimens were taken from original tubing.
The portion A was affected by corrosion, however portion B was not affected by corrosion in the SSRT test.
The properties of precipitated inclusion such as hydrogen solubility and diffusion ratio are important factors of crack propagation process.
Online since: September 2013
Authors: Chu Nan Tang, Shi Bin Tang, Zheng Zhao Liang, Hong Li
The pre-existing fractures in rock can close, open and growth as it subjected to mechanical or environment loading, which can in turn change the structure of the rock and alter its fluid flow properties.
And then Irwin [2] further introduced the concept of critical energy release rate and the stress intensity factor at the crack tip.
Nakashima [12] studied the effects of hydro- static, dynamic and chemistry damages on stress intensity factor at the tip of cracks.
Therefore, the coupling of seepage flow, water pressure and the mechanical response can be modeled for the rock material as it subjected to hydraulic and mechanical loading.
Furthermore, the permeability of rock is affected by the stress state and the damage evolution which can be modeled by Eq. (5).
Online since: November 2015
Authors: P. Arunkumar, U. Chandrasekhar, Esakki Balasubramanian
Thermo mechanical modeling of selective inhibition sintered thermoplastic parts Arunkumar P1,a, Balasubramanian E2,b* and Chandrasekhar U3,c 1Junior Research Fellow, *2Associate Professor Center for Autonomous System Research (CASR), Vel Tech University, Chennai 3Director, Engineering Staff College of India, Hyderabad aarunmech198@gmail.com, *besak.bala@gmail.com, crapidchandra@gmail.com Keywords: Selective Inhibition Sintering, Thermo-Structural, Polymers, Finite Element Analysis Abstract: Contemporary product design and development efforts of various engineering organizations have experienced the emergence of Additive Manufacturing (AM) or 3D printing technology as a competent fabrication option for converting digital data into physical parts without using part-specific tools or fixtures.
Thermal gradients that are inherent to the process cause significant residual stresses affecting the part stability.
The thermal and structural properties of these materials are obtained from the standard material database [12].
Khoshnevis, Performance factors in the selective inhibition of sintering process, Institute of Industrial Engineering Research Conference, Portland, OR. 2003 [6] L.
Online since: March 2016
Authors: Hui Qin Lian, Xiu Guo Cui, Lei Zu, Yan Ou Hu, Yue Ting Li, Yang Liu, Yu Peng Liu, Ben Ze Wu
Among the many SMPs, shape memory polyurethane (SMPU) has been found the broadest applications because of their ample properties [4].
It was because that the decrease of hard segment would weaken the phase separation which was the main factor affecting the shape memory property [20].
H-bonding and crystallinity, which affected the thermal properties, were showed in FTIR, XRD, DSC and POM respectively.
Thermal and mechanical properties of thermoplastic polyurethane elastomers from different polymerization methods, Polym Int 1993;31:329
Shanmugharaj, Thermal, mechanical and electroactive shape memory properties of polyurethane (PU)/poly (lactic acid) (PLA)/CNT nanocomposites, European Polymer Journal, 49 (2013) 3492-3500.
Online since: February 2014
Authors: Hua Chen Pan, Bin Guo
Numerical study on effect of wall on upwelling flow Pan Huachen1, a, Guo Bin2,b 1,2School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou, China a,bE-mail: guobin8709@163.com Keywords: numerical method; gas-liquid two phase flow; wall; upwelling flow.
It is one of the gas-liquid two phase flows and it is influenced by many factors, e.g. air supply, height, bubble diameters, nozzle distance to wall and so on.
When the physic model is defined, the fluid properties and boundary conditions are specified.
So there exists a flow circulation and the reverse flow could affect upwelling flow.
The result shows that reverse flow is influenced by wall and then it affects upwelling flow.
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