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Online since: October 2007
Authors: Yukichi Umakoshi, Koji Hagihara, Mayumi Mori
Recently, we investigated the mechanical properties of these compounds, and found that a yield stress anomaly appears not only in L12-Ni3Al but also in other hcp-based GCP compounds such as D0a-Ni3Nb [1], D024-Ni3Ti [2], D019-Ni3Sn [3] and so on [4].
From the viewpoint of their mechanical properties, the multi-phase alloys composed of these GCP compounds are expected to be a new high-temperature structural material [5-11].
Taking this peculiar microstructure into consideration, control of the operative deformation mode was attempted by focusing on the Schmid factors as shown in Table 1.
Table 1 Schmid factors for possible deformation mode at [557] loading orientation.
The observed systems are actually the ones which have the maximum Schmid factors with satisfying above criterion.
Online since: November 2020
Authors: Mohammad Ali Ketabi, Reza Fekrazad, Hamid Keshvari, M.M. Abolhasani, Ali Sadeghi, Farbod Tondnevis
It is a long-lasting inflammatory disease affecting the soft and hard tissues around the teeth [1].
By increasing the ratio of the drug to the polymer structure continuously released the drug provided, but mechanical properties of the structure weakened.[9].
The mechanical properties of electrospun nanofibrous scaffolds regarding Figure 2 were reported in Table 2.
Conclusion Our study focused on the physical, mechanical and continues drug releasing properties of electrospun polyurethane-SWNT nanofibers.
Epidemiology and risk factors of periodontal diseases.
Online since: March 2012
Authors: Worapong Boonchouytan, Thanate Ratanawilai, Prapas Muangjunburee
The factors of welding were rotating speed rates at 1320, 1750 rpm and heat treatment conditions.
Rotating speed and heat treatment (T6) condition were an important factor to micro, macro structure of metal and mechanical properties of the weld.
In the case of conventional A356 alloys, the mechanical properties of the joints are improved in comparison to the base metal [6].
The aim of this work is to evaluate the effect that FSW has on the mechanical properties of the SSM 356 alloy in as cast and heat treated condition.
Microstructure, hardness and tensile properties of the weld joint have been studied and the results are reported.
Online since: December 2024
Authors: Iuliana Duma, Alin Constantin Murariu, Radu Nicolae Popescu
Carbon steels find extensive use in the fabrication of pipeline networks due to their proper characteristics, including resistance, durability, excellent weldability, and recommended mechanical properties [1-4].
CO2, in tandem with other factors, accelerates the progression of the corrosion process, leading to a reduction in the pipe network's cross-sectional area.
However, the corrosion behaviour of steels is contingent upon variables like chemical composition, metallographic structure, mechanical properties, internal stress levels, operational loads, and material impurities and welding imperfections.
Furthermore, the geometric configuration of components, in conjunction with stress concentration factors, play an important role in the corrosion resistance behaviour.
Thermal and structural modelling of arc welding processes: A literature review, Measurement and Control.,52(7-8), 2019, pp. 955-969, doi:10.1177/0020294019857747 [16] Ghosh A., Chattopadhyaya S., Dasb R.K, Sarkarb P.K.: Assessment of Heat Affected Zone of Submerged Arc Welding Process through Digital Image Processing, Procedia Engineering 10 (2011) 2782–2785 [17] Dwivedi D, Lepkova K., Becker T.: Carbon steel corrosion: a review of key surface properties and characterization methods, RSC Advances 7(8), 2017, pp. 4580-4610 [18] F.
Online since: July 2006
Authors: Jürgen Hirsch
The resulting microstructure is the foundation for most of the following microstructure evolution effects occurring during further processing (rolling, extrusion), thus affecting properties of the final product.
The coarse grain structure is compressed and usually begins to recrystallize and particularly brittle constituent particles brake up into small pieces affecting formability, also of the final product.
With this concept it is now possible to follow the microstructure (grain structure, texture and microchemistry) and associated mechanical properties through the whole process chain from DC-casting to forming.
It now is possible to combine models on various levels for a complete simulation of the process chains which involves microstructure evolution and resulting mechanical properties.
References [1] T.E.Scott in "Aluminium Alloys, Their Physical and Mechanical Properties", edited by E.
Online since: October 2019
Authors: Pu Yang, Ming Hao Hu, Daniel McCrum
Strut eccentricity is the key factor affecting the capacity of the strut and buckling strength, while joint clearance also has influence on the strut capacity and energy dissipation.
The stiffness coefficient K depends on material properties and the contact surfacing and is defined as (2).
Geometric conditions (end connections and section size) and material property follows Black’s experiment [6].
From the results of last chapter, the configuration has significant impacts compared with other factors.
Claro,2003, Dynamic analysis for planar multibody Mechanical systems with real joints,
Online since: June 2010
Authors: Chang Zhong Hao, Dong Mei Ma
Various parameters including tool geometry, rolling volume, rolling speed, rolling position, the thickness of blanks and material properties, affect the processing surface feature, mechanical and physical performance in different degrees.
Rolling technology is a process which plastically deforms the material's geometry and also changes the mechanical properties of the material.
Influence factors and parameter settings.
The most important factors in the rolling process including rolling depth, △h, and rolling position, P, have been discussed.
Fig. 4 The cloud of broadside displacement at the position Conclusions This paper discusses the effect of the two main factors in the rolling process on the broadside feature.
Online since: April 2015
Authors: E. Shaffie, J. Ahmad, D. Kamarun
Rutting occurs mainly due to several factors including increasing of traffic loads, environmental conditions and also due to construction and design errors.
As a consequence, the service life of asphalt pavement is affected and will be shortened.
These factors will increase pavement distress such as rutting, shoving, polish aggregates, potholes, raveling, stripping, bleeding and bulging.
These studies concluded that nanoclay and carbon nano fibre was found to enhance the mechanical properties of the asphalt binder.
The volumetric properties and OBC of all mixtures were present in Table 1.
Online since: May 2011
Authors: Yang Li, Xin Shen, Ben Liang Sun, Lin Wang, Yang Xu, Lei Zhang
The surface of copper plate of the mold need to be reinforced to obtain the plating coatings with high hardness and corrosion resistant properties.
The effective factors on the property of coatings, bath temperature, cathode current density, the distance between two electrodes and the magnitude of Nano-ZrO2,were experimentally studied.
The layer with good properties can be obtained in this method.
Factor C and factor A link the third and the fourth effective factors on the property of the coatings.
Structure and Properties of Ni-WC Nano-Composite Coating by Electroplating.Sueface Technology[J]. 2008(10): 70~74.In chinese
Online since: January 2022
Authors: B. Vijaya Prasad, N. Anand, Arun P. Kumar, Paul Daniel Arumairaj, T. Dhilip, M. Sanath Kumar
Geopolymers are an alternative binder for cement concrete production because of their superior mechanical properties.
Fresh and hardened properties of GPC are examined by appropriate experiments.
Setting time and workability are the key factors to be investigated further in HCF based GPC[12].
Hardened Properties of GPC.
Mehta, ACI, 144 (1994) 383–93 [9] Topark-Ngarm P, Chindaprasirt P and Sata V, Setting time, strength, and bond of high-calcium fly ash geopolymer concrete, Journal of Materials in Civil Engineering. 27(7) (2015) 1–7 [10] Part W K, Ramli M and Cheah C B, An overview on the influence of various factors on the properties of geopolymer concrete derived from industrial by-products, Construction and Building Materials. 77 (2015) 370–95 [11] Cheah C B, Samsudin M H, Ramli M, Part W K and Tan L E ,The use of high calcium wood ash in the preparation of Ground Granulated Blast Furnace Slag and Pulverized Fly Ash geopolymers: A complete microstructural and mechanical characterization, Journal of Cleaner Production. 156 (2015) 114–23 [12] Vijaya Prasad and Arumairaj,Recent Advancements in Geopolymer Concrete using Class-F and Class-C Fly Ash, International Journal of Innovative Technology and Exploring Engineering. 8 (2019) 5879–84 [13] Antoni, Wijaya S W and Hardjito D, Factors affecting
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