Mechanical strength characteristics of asymmetric tilt grain boundaries in graphene

Carbon ◽  
2014 ◽  
Vol 68 ◽  
pp. 250-257 ◽  
Author(s):  
Jihoon Han ◽  
Seunghwa Ryu ◽  
Dongwoo Sohn ◽  
Seyoung Im
Keyword(s):  
Mechanical Strength ◽  
Grain Boundaries ◽  
Strength Characteristics

Mechanical strength characteristics of fiber-reinforced pond ash for pavement application

2020 ◽  
Vol 5 (3) ◽  
Author(s):  
Sudhakar Mogili ◽  
Ashfaq G. Mohammed ◽  
Heeralal Mudavath ◽  
Kalyan Kumar Gonavaram
Keyword(s):  
Mechanical Strength ◽  
Strength Characteristics ◽  
Fiber Reinforced ◽  
Pond Ash

Effects of Rare Earth Oxides on Microstructures and Properties of Magnesia Refractories

2008 ◽  
Vol 368-372 ◽  
pp. 1158-1160 ◽  
Author(s):  
Bao Guo Zhang ◽  
Zhou Fu Wang ◽  
Shao Wei Zhang ◽  
Xi Tang Wang ◽  
Zi Wei Xu
Keyword(s):  
Mechanical Properties ◽  
Solid Solution ◽  
Rare Earth ◽  
High Temperature ◽  
Mechanical Strength ◽  
Grain Boundaries ◽  
Bulk Density ◽  
Rare Earth Oxide ◽  
Rare Earth Oxides ◽  
Microstructure And Mechanical Properties

The effects of Y2O3, La2O3 and Nd2O3 on the sintering, microstructure and mechanical properties of magnesia refractories were investigated. Addition of rare earth oxide (ReO) to magnesia refractories increases the bulk density, decreases the porosity and improves the mechanical strength of the refractories. The improved sinterability was attributable to the vacancies generation associated with the solid-solution reactions between MgO and ReO. In the samples with ReO, rare earth silicate phases form at magnesia grain boundaries, providing additional bonding between magnesia grains and between magnesia grains and matrix. Consequently, the samples with ReO showed much higher high temperature strengths than those without ReO.

scholarly journals Evolution of Microstructure during Isothermal Treatments of a Duplex-Austenitic 0.66C11.4Mn.9.9Al Low-Density Forging Steel and Effect on the Mechanical Properties

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 214
Author(s):  
Idurre Kaltzakorta ◽  
Teresa Gutierrez ◽  
Roberto Elvira ◽  
Pello Jimbert ◽  
Teresa Guraya
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Mechanical Strength ◽  
Grain Boundaries ◽  
Automotive Industry ◽  
Carbide Precipitation ◽  
Water Quenching ◽  
Low Density ◽  
Evolution Of Microstructure ◽  
Kappa Carbide

In the last decades, low-density steels for forging have increasing interest in the automotive industry, and good mechanical properties are required for their real application. This paper describes the results obtained for a 0.66C11.4Mn9.9Al duplex austenitic low-density steel after applying a set of isothermal treatments at different combinations of time and temperature, aimed to promote kappa carbide precipitation, and improve the mechanical properties obtained with a water quenching treatment. The effects of the different isothermal treatments on the microstructure and on the mechanical properties have been analyzed and compared to those obtained from a quenching heat treatment. We found that isothermal treatments in the range temperature between 550–750 °C promoted the profuse precipitation of coarse kappa carbides at grain boundaries, which dramatically reduced the ductility of the alloy, whereas a traditional quenching treatment resulted in a better combination of ductility and mechanical strength.

Influence of long-term CH4 and CO2 treatment on the pore structure and mechanical strength characteristics of Baijiao coal

Energy ◽  
2021 ◽  
pp. 122986
Author(s):  
Weile Geng ◽  
Gun Huang ◽  
Shengli Guo ◽  
Changbao Jiang ◽  
Ziwen Dong ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Pore Structure ◽  
Strength Characteristics ◽  
Co2 Treatment

scholarly journals Mechanical-strength characteristics of concrete made with stainless steel industry wastes as binders

2019 ◽  
Vol 204 ◽  
pp. 675-683 ◽  
Author(s):  
M.D. Rubio-Cintas ◽  
S.J. Barnett ◽  
F. Perez-García ◽  
M.E. Parron-Rubio
Keyword(s):  
Stainless Steel ◽  
Mechanical Strength ◽  
Steel Industry ◽  
Strength Characteristics

Improvements in Strength and Electrical Conductivity in 7B04 Aluminum Alloy Pre-Stretched Thick Plates Via Low-Temperature Retrogression and Re-Ageing Heat Treatments

2007 ◽  
Vol 561-565 ◽  
pp. 139-142 ◽  
Author(s):  
Zhi Hui Li ◽  
Bai Qing Xiong ◽  
Yon Gan Zhang ◽  
Bao Hong Zhu ◽  
Feng Wang ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Electrical Conductivity ◽  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Low Temperature ◽  
Mechanical Strength ◽  
Grain Boundaries ◽  
Aluminum Matrix ◽  
Thick Plates ◽  
Research Results

The effect of RRA treatment with using low retrogression temperatures between 170°C to 190°C on the strength and electrical conductivity (as an indicator of corrosion resistance) of 7B04 aluminum alloy thick plates was investigated. The research results showed that the low-temperature RRA heat treatment provides a means for improving electrical conductivity of the aluminum alloy 7B04 pre-stretched thick plates without sacrificing the mechanical strength. The RRA temper with retrogression at 180°C for 60 min improved electrical conductivity remarkably (reached 21.0MS/m), with only a 3% reduction in strength below T6 temper. Furthermore, TEM observations showed that the microstructure of RRA treated alloy was a very fine distribution of η′ MgZn2 precipitates in the aluminum matrix, similar to T6 condition and η MgZn2 precipitates on grain boundaries distributed similarly to T73 temper.

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