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Online since: May 2020
Authors: Vira Vakhrusheva, Nataliia Hruzin, Ihor Tiutieriev, Oleksandr Malysh
Mechanical properties depend on CSR.
Stringent requirements stipulate a simultaneous interval in terms of mechanical properties, texture and technological tests while maintaining stability of these properties.
The Study Objectives Establish effect of texture on mechanical properties of tubes.
Analysis of the results of a sufficiently large statistical set of studies performed in assessment of mechanical properties and the contractile strain ratio has allowed us to evaluate texture effect on mechanical properties and determine existing values of combination of CSR and mechanical properties.
Physico-mechanical properties of light structural alloys.
Online since: June 2011
Authors: Zi Yong Hou, She E Hu, Yun Bo Xu, Wei Hua Sun, Guo Dong Wang, Di Wu
Microstructure and Mechanical Properties of ULCB Steels affected by advanced TMCP Technology Ziyong HOU1, a, *, Yunbo XU1, b, Di WU1, c, Wei-hua SUN 2, She-e HU 2 and Guodong WANG1, d 1State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, Liaoning Province, 110819, CHINA 2Technical Center, Jinan Iron and Steel Group Company, Jinan 117000, CHINA, a,*houzy525406@163.com, bxuyunbo@mail.neu.edu.cn, cwudi@mail.neu.edu.cn, dwanggd@mail.neu.edu.cn   Keywords: microstructure; ultra-high strength and toughness; advanced TMCP Technology; ULCB Steels.
Microstructural evolution and mechanical properties of this steel during hot-working have been investigated.
Results and Discussion Mechanical Properties.
(a) (b) 20μm (c) (d) 20μm Fig5 Optical microstructure of tested steels variation with processing conditions (a) route A1; (b) route A2; (c) route B1; (d) route B2 As well known, the mechanical properties of multiphase steels are based on several factors such as the morphology, properties and volume fraction of the constituent phases [12,13].
Multiphase microstructures allow to improve these latter properties [13].
Online since: April 2019
Authors: Viton Uthaisangsuk, Saranya Kingklang, Patiphan Boonsukachote
Thus, mechanical properties, especially strength and toughness of rail steel must be continuously increased.
Hence, the improvement of mechanical properties of the rails are considerably necessary.
In order to determine mechanical properties of the rail steel, tensile tests were carried out.
Hence, the influences of bainite on mechanical properties of rail steels with mixed microstructure were aimed.
Summary The microstructure and mechanical properties of the rail steel grade 900A were investigated.
Online since: October 2012
Authors: Ta Peng Chang, Tzong Ruey Yang, Chun Tao Chen, Yuan Kai Lee, Bo Tsun Chen
The effects of three levels of two major controlling factors, the degree of polymerization of the activating solution (weight ratio of SiO2 to Na2O) of 0.4, 0.7 and 1.0 and the weight ratio of liquid to solid (L/S) of 0.7, 0.85 and 1.00 on the engineering properties of geopolymer are investigated.
The geopolymer has several attractive material properties like high compressive strength, good fire and acid resistance, etc. such that it gradually attracts more attention in recent years. [1-4] Previous studies showed that the ratio of liquid (alkaline solution) to solid (metakaolin) (RLS) by weight and the ratio of SiO2 to Na2O (RSN) by weight are two significant factors that affect the mechanical properties of geopolymer [5].
Xu et al indicated that the ratio of SiO2 to Na2O of activating solution by weight (RSN) affects the reaction of polymerization and its engineering properties and had a linear relationship with the amount of precipitation of aluminum and silica ions. [1] As the ratio of liquid to solid is increasing, the initial and final setting times of geopolymer paste are also increased.
Komnitsas et al. [6] indicates the hydroxide concentration is a vital factor to control the strength.
Table 1 Chemical compositions and physic properties of kaolin Chemical Physic SiO2 Al2O3 Fe2O3 Na2O TiO2 L.O.I.
Online since: July 2013
Authors: Ming Der Jean, Maw Tyan Sheen
Several coatings analytical parameters were studied and these factors affecting coating properties were carried out in the plasma-sprayed experiments.
Some studies have been focused on the identification and quantification of mechanical properties in plasma sprayed coatings.
Among those properties, the nature of the microhardness and coating structures significantly influences various types of coating properties, such as bond strength, thermal cycling and wear resistance, etc.
Mechanical Properties .Several mechanical property results of the coatings, for different travel speed of spun at powder-feeder rate of 20g/min, are shown Table 2.
The effect of powder-feeder rate of sprayed gun on mechanical properties.Figure3 shows the effect of powder-feeder rate on the hardened strength of coatings at travel speed of sprayed gun of 20mm/s, 25mm/s and 30mm/s, respectively.
Online since: May 2011
Authors: Si Qun Wang, Guan Ben Du, Kun Liang, Omid Hosseinaei, Hui Wang
But the increase ratio of mechanical properties was close.
And the lastest two factors, penetration of resin in wood issue, should be more cared about.
The adhesive penetration can change mechanical properties of the wood cell wall.
Probing the mechanical properties of the S2 layer and CCML in wood can lead to greater fundamental understanding of wood properties and penetration behaviour below the cellular level.
These reults prove PF affects the mechanical properties at the same depth from bond line.
Online since: July 2015
Authors: Nurul Shuhada Mohd Makhtar, Miradatul Najwa Mohd Rodhi, Nur Shahidah Ab Aziz, Nur Farzana Abdul Ghafar
These polymers have great ability in terms of mechanical properties.
By utilizing Tacca leontopetaloides starch, the properties improvement of TPS with the addition of natural rubber and glycerol plasticizer are studied in terms of their mechanical properties.
Mechanical properties.
It proves the possibility to produce biopolymer with good mechanical properties.
This shows the in-situ compatibilization that makes the mechanical properties of GM samples was improved.
Online since: September 2014
Authors: Yang Wang, Ming Zhang, Chao Jian Hou, Wei Qiang Chen, Li Jun Yang
The results show that owing to CFRP has the characteristic of anisotropy, laser cutting direction is the most significant factor that affects the quality of kerf cut by UV laser.
For instance, CFRP can be applied in the satellite ontology structure like satellite shell and center bearing cylinder by fully utilized its characteristics of small density and good fatigue, also by means of using high temperature resistance and excellent mechanical properties can be devoted to the key components of carrier rocket like engine combustion chamber and the exhaust[2,3].
Conclusions 1) The notable factor that affects width of kerf and size of HAZ is laser cutting direction.
Study on microwave absorbing ability and mechanical properties of carbonous composiyes[D].Dong hua university,2008:27-28
Mechanical Design and Theory in Hebei University of Science and Technology,2012:1-5
Online since: December 2013
Authors: Yin Duan, Chao Zhang, Xiaolin Chang
Thus, it is necessary to take into account the morphology and mechanical properties of the concrete material when building the mechanical model [6].
Meanwhile, the random probability distribution method is used to reflect the randomness of material properties in space, which can get more realistic mechanical behavior and properties.
A greater k value means the distribution of concrete mechanical properties more concentrated.
Accordingly, 8 concrete three-phase heterogeneous models are built, which can reflect the randomness of the mesoscopic structures with the same macroscopic mechanical properties.
The combination of above three effect factors is the most unfavorable to produce crack in the concrete interior.
Online since: April 2014
Authors: Zi Qiao Zheng, Chun Ping Fan, Min Jia, Ji Fa Zhong, Bin Cheng
The average mechanical properties values in the center of the plate are listed in Table1for the L, LT orientations, respectively.
The microstructure structure differences through the rolled plate thickness, including grain properties, second-phase particles and texture[17], result in the differences in mechanical properties.
And the diversity of texture sorts and content which may affect the amount of activated slip systems (jmax) and the value of Schmid factor(mij), seems to be the key factor that leads to the variation of the tensile properties in different thickness layers.
All these factors contribute to poor fracture toughness in S-L orientation.
Ritchie, Mechanical properties of Al-Li alloys Part 1Fracure toughness and microstructure, Mater.
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