Effect of chemical composition on the microstructure and mechanical properties of MoCoB based cermets

2020 ◽  
Vol 46 (11) ◽  
pp. 18046-18055
Author(s):  
Guoqiang Yang ◽  
Haiqing Yin ◽  
Zhenghua Deng ◽  
Cong Zhang ◽  
Ruijie Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Microstructure And Mechanical Properties

Microstructure and Mechanical Properties of Al-12.6%Si Composite Reinforced by Al63Cu25Fe12Quasicrystal

2012 ◽  
Vol 182-183 ◽  
pp. 162-166
Author(s):  
Can Can Li ◽  
Hao Ran Geng ◽  
Zhen Yuan Li ◽  
Hai Ou Qin
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Cooling Rate ◽  
Quasicrystalline Phase ◽  
Melt Temperature ◽  
Microstructure And Mechanical Properties

In this paper, Al-12.6%Si/Al63Cu25Fe12 composites were fabricated by method of casting. The microstructure and chemical composition of Al63Cu25Fe12 quasicrystal alloy and Al-12.6%Si alloy reinforced by the quasicrystal were studied, and the mechanical properties of Al-12.6%Si composite were also measured. The results show that almost single quasicrystalline phases exist in the samples which are cast with the 1300°C melt. Quickly enough cooling rate and appropriate melt temperature are necessary for the formation of the quasicrystalline phase. In addition, Al-12.6%Si composite has optimal mechanical properties when the amount of Al63Cu25Fe12 quasicrystal is 3 wt%.

Characterization of the Naked Mole Rat Incisors: Chemical Composition, Microstructure and Mechanical Properties

2021 ◽  
pp. 1-10
Author(s):  
Hongyan Qi ◽  
Guixiong Gao ◽  
Huixin Wang ◽  
Yunhai Ma ◽  
Hubiao Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Lamellar Structure ◽  
Three Dimensional ◽  
Microstructure And Mechanical Properties ◽  
Inorganic Matter ◽  
Mole Rat ◽  
Naked Mole Rat ◽  
Reticular Structure

The naked mole rat incisors (NMRI) exhibit excellent mechanical properties, which makes it a good prototype for design and fabrication of bionic mechanical systems and materials. In this work, we characterized the chemical composition, microstructure and mechanical properties of NMRI, and further compared these properties with the laboratory rat incisors (LRI). We found that (1) Enamel and dentin are composed of organic matter, inorganic matter and water. The ratio of Ca/P in NMRI enamel is higher than that of LRI enamel. (2) The dentin has a porous structure. The enamel has a three-dimensional reticular structure, which is more complex, regular and denser than the lamellar structure of LRI enamel. (3) Enamel has anisotropy. Its longitudinal nano-hardness is greater than that of transverse nano-hardness, and both of them are higher than that of LRI enamel. Their nano-hardness and elastic modulus increase with the increment of distance from the enamel-dentin boundary. The nano-hardness of dentin is smaller than that of enamel. The chemical composition and microstructure are considered to be the reasons for the excellent properties of NMRI. The chemical composition and unique microstructure can provide inspiration and guidelines for the design of bionic machinery and materials.

scholarly journals Process Design Strategies for Producing Heavy Section Steel with Improved Quality

2013 ◽  
Vol 652-654 ◽  
pp. 988-991
Author(s):  
Jing Wei Zhao ◽  
Zheng Yi Jiang ◽  
Dong Bin Wei ◽  
Chong Soo Lee
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Longitudinal Direction ◽  
Ring Rolling ◽  
Design Strategies ◽  
Noticeable Effect ◽  
Heavy Section ◽  
Microstructure And Mechanical Properties ◽  
Impact Energies ◽  
The Impact

Uniformity of microstructure and mechanical properties is required for the heavy section steel. In the present work, a heavy section wind tower flange was manufactured by controlled ring-rolling. Post-rolling heat treatment was employed to optimize the microstructure and mechanical properties. The chemical composition, microstructure and mechanical properties in different zones of the flange were investigated. The results showed that the chemical composition and microstructure were uniformly distributed in the flange. The tensile strength showed similar values in different sampling locations. The strain and impact energies of specimens prepared along the longitudinal direction were higher than that prepared along both the radius and thickness directions. Notch direction did not have noticeable effect on the impact energy. It is demonstrated that the designed process is effective for producing heavy section steel with improved quality.

The Influence of the Re-Melting Times on Microstructure and Mechanical Properties for Revert Alloy K452

2013 ◽  
Vol 747-748 ◽  
pp. 715-722 ◽  
Author(s):  
Chao Yuan ◽  
Jian Ting Guo ◽  
Chang Jiang Liu ◽  
Jie Shan Hou ◽  
Gu Song Li
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Gas Turbines ◽  
Engineering Application ◽  
Ceramic Foam ◽  
Gas Content ◽  
Vacuum Induction Melting ◽  
Induction Melting ◽  
Microstructure And Mechanical Properties ◽  
Key Factor

The influence of the re-melting times on chemical composition, microstructure, and mechanical properties of revert alloy K452 were systemically investigated. It was shown that the key factor in the engineering application was the control of gas content and porosities level in revert alloy. By an advancing technology in combination with the superheat treatment, adding a small amount of alloying elements such as C, Al, Ti, and using ceramic foam filters during vacuum induction melting, the composition and mechanical properties of the revert alloy in addition of 50% scrap were similar to that in the virgin alloy, which has successfully been used in applications for nozzle vanes of some new gas turbines.

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