Crystal plasticity analyses of size effect on ferrite/cementite fine lamellar structure : Mechanical properties of the ferrite lamellar with the effects of the lamellar thickness and direction of dislocation movement

2014 ◽  
Vol 2014.27 (0) ◽  
pp. 520-522
Author(s):  
Yohei YASUDA ◽  
Tetsuya OHASHI
Keyword(s):  
Mechanical Properties ◽  
Size Effect ◽  
Crystal Plasticity ◽  
Lamellar Structure ◽  
Lamellar Thickness ◽  
Dislocation Movement

EFFECTS OF UNTWINNING AND {1012} TWIN LAMELLAR STRUCTURE ON THE MECHANICAL PROPERTIES OF Mg ALLOY

2013 ◽  
Vol 49 (3) ◽  
pp. 291 ◽  
Author(s):  
Chao LOU ◽  
Xiyan ZHANG ◽  
Runhong WANG ◽  
Gaolin DUAN ◽  
Qing LIU
Keyword(s):  
Mechanical Properties ◽  
Lamellar Structure ◽  
Mg Alloy

scholarly journals Experimental Study on the Mechanical Properties and Compression Size Effect of Recycled Aggregate Concrete

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2323
Author(s):  
Yubing Du ◽  
Zhiqing Zhao ◽  
Qiang Xiao ◽  
Feiting Shi ◽  
Jianming Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Size Effect ◽  
Compressive Stress ◽  
Failure Modes ◽  
Recycled Concrete ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Aggregate Concrete ◽  
Substitution Ratio ◽  
The Impact

To explore the basic mechanical properties and size effects of recycled aggregate concrete (RAC) with different substitution ratios of coarse recycled concrete aggregates (CRCAs) to replace natural coarse aggregates (NCA), the failure modes and mechanical parameters of RAC under different loading conditions including compression, splitting tensile resistance and direct shear were compared and analyzed. The conclusions drawn are as follows: the failure mechanisms of concrete with different substitution ratios of CRCAs are similar; with the increase in substitution ratio, the peak compressive stress and peak tensile stress of RAC decrease gradually, the splitting limit displacement decreases, and the splitting tensile modulus slightly increases; with the increase in the concrete cube’s side length, the peak compressive stress of RAC declines gradually, but the integrity after compression is gradually improved; and the increase in the substitution ratio of the recycled aggregate reduces the impact of the size effect on the peak compressive stress of RAC. Furthermore, an influence equation of the coupling effect of the substitution ratio and size effect on the peak compressive stress of RAC was quantitatively established. The research results are of great significance for the engineering application of RAC and the strength selection of RAC structure design.

Size Effect on Mechanical Properties of LVL

2014 ◽  
Vol 887-888 ◽  
pp. 824-829
Author(s):  
Qing Fang Lv ◽  
Ji Hong Qin ◽  
Ran Zhu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Size Effect ◽  
Tensile Test ◽  
Compression Test ◽  
Test Results ◽  
Laminated Veneer Lumber ◽  
Object Of Study ◽  
The Relationship

Laminated veneer lumber is taken as an object of study, and use LVL specimens of different sizes for compression test and tensile test. The goal of the experiment is to investigate the size effect on compressive strength and tensile strength as well as the influence of the secondary glued laminated face, which appears in the secondary molding processes. The results show that both compressive strength and tensile strength have the size effect apparently and the existence of the secondary glued laminated face lower the compressive strength of LVL specimens. Afterwards, the relationship between compressive strength and volume along with tensile strength and area are obtained by the test results.

Size Effect of CeO2 Particle On Nanoscale Single-Asperity Sliding Friction

2021 ◽  
Author(s):  
Ning Xu ◽  
Jiahui Ma ◽  
Qi Liu ◽  
Weizhong Han ◽  
Zhiwei Shan
Keyword(s):  
Mechanical Properties ◽  
Size Effect ◽  
Sliding Friction ◽  
Abrasive Particle ◽  
Friction Behavior ◽  
Single Asperity ◽  
Ultra Precision ◽  
Ceo2 Particle ◽  
Cutting Regimes ◽  
Tip Radius

Abstract The size of abrasive particle has a great impact on the fundamental friction behavior and mechanical properties of the abrasive during ultra-precision polishing performance. Here, the size effect of the tribological behavior and mechanical properties of CeO2 single abrasive were studied. Experimental results show that the size effect plays a role on coefficient of friction (COF) of each regime in single-asperity sliding friction, especially in ploughing and cutting regimes. The residual depth of the scratch and COF both decrease with the increase of the CeO2 tip radius. These results relate to the mechanical properties of CeO2 nanoparticles. We found that the effective modulus increases with the decrease of abrasive size, which corresponds to the size effect of the single-asperity sliding friction experiment.

INTERMETALLIC COMPOUND AlxTi – ARE PROMISING MATERIAL FOR HIGH ELEVATED TEMPERATURES (review) Part 1. The crystaline structure and properties of the intermetallic compound Al2Ti

2021 ◽  
pp. 28-43
Author(s):  
N.A. Nochovnaya ◽  
◽  
V.I. Ivanov ◽  
L.Yu. Avilochev ◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Intermetallic Compound ◽  
Lamellar Structure ◽  
Power Plants ◽  
Elevated Temperatures ◽  
Texture Formation ◽  
Structure And Properties ◽  
High Temperature Alloys ◽  
Transformation Mechanisms ◽  
Increased Strength

The Al2Ti intermetallic compound is the most promising base for high-temperature alloys designed for advanced power plants. This work provides an overview of the structures of binary alloys concerning to the Ti–Al system, as well as the phase transformation mechanisms and the peculiarities of plastic deformation of alloys. The alloys which phase composition is represented by a mixture of r-Al2Ti+γ-TiAl with a lamellar structure show anomalous mechanical properties depending on texture formation and grain size. These alloys possess increased strength and decreased plasticity at elevated temperatures.

Characterization of Structure of Thermally Sprayed Coating

1998 ◽  
Author(s):  
C.J. Li ◽  
Y. He ◽  
A. Ohmori
Keyword(s):  
Lamellar Structure ◽  
Structural Parameters ◽  
Lamellar Thickness ◽  
Pore Networks ◽  
Bonding Ratio ◽  
Sprayed Coating ◽  
The Relationship ◽  
Thermally Sprayed ◽  
Sprayed Coatings

Abstract The structure of a thermally sprayed coating is generally of lamellar structure. There is generally porosity in the coating. The examination shows that the relationship between properties and porosity for conventionally processed porous materials is difficult to be applied to thermally sprayed coating because of complex pore networks. The lamellar structure of the coating and the bonding at the interfaces between lamellae often determine the properties of coating. It is generally difficult to evaluate quantitatively the structure of a thermally sprayed coating because of complicated pore networks in the coating. With the filling of the material different from the composition of the coating into the pores the structure of the coating including nonbonded interface area and also generally referred pores can be visualized. According to the distribution of filler in the coating the structure of a coating can be quantitatively evaluated using structural parameters such as lamellar thickness, lamellar bonding ratio, the width of interface gap and so on. The structural parameters necessary to describe the lamellar structure of thermal sprayed coatings and a method based on the pore filling and analysis of the distribution of filled materials are proposed.

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