Kinetics of deformation processes in high-alloyed cast transformation-induced plasticity/twinning-induced plasticity steels determined by acoustic emission and scanning electron microscopy: Influence of austenite stability on deformation mechanisms

2013 ◽  
Vol 61 (7) ◽  
pp. 2434-2449 ◽  
Author(s):  
A. Vinogradov ◽  
A. Lazarev ◽  
M. Linderov ◽  
A. Weidner ◽  
H. Biermann
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Acoustic Emission ◽  
Deformation Mechanisms ◽  
Transformation Induced Plasticity ◽  
Austenite Stability ◽  
Alloyed Cast ◽  
Deformation Processes ◽  
Kinetics Of ◽  
Scanning Electron

scholarly journals Preparation and Assessment of Some Characteristics of Nanoparticles Based on Sodium Alginate, Chitosan, and Camellia chrysantha Polyphenols

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Phu Hoang Luong ◽  
Thuy Chinh Nguyen ◽  
The Dan Pham ◽  
Do Mai Trang Tran ◽  
Thi Ngoc Lien Ly ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Release Kinetics ◽  
Release Kinetic ◽  
Ionic Gelation ◽  
Visible Spectroscopy ◽  
Polyphenol Content ◽  
Release Process ◽  
Kinetics Of ◽  
Scanning Electron

This paper presents the characteristics, morphology, and properties of alginate/chitosan/polyphenol nanoparticles, in which polyphenols were extracted from Camellia chrysantha leaves collected in Tam Dao district, Vinh Phuc province (Vietnam). The alginate/chitosan/polyphenol nanoparticles were prepared by ionic gelation method at different polyphenol content. The characteristics and morphology of these nanoparticles were investigated using infrared spectroscopy (IR), ultraviolet-visible spectroscopy (UV-Vis), and scanning electron microscopy (SEM). Release kinetic of polyphenols from the alginate/chitosan/polyphenol nanoparticles was conducted in simulated human body fluids. The release kinetics of polyphenols from the above nanoparticles were also evaluated and discussed. The experimental results showed that the release process of polyphenols from the nanoparticles was dependent on three factors: time, pH of solution, and amount of polyphenols.

Study of Deformation Phenomena in TRIP/TWIP Steels by Acoustic Emission and Scanning Electron Microscopy

2018 ◽  
Vol 119 (4) ◽  
pp. 388-395 ◽  
Author(s):  
M. L. Linderov ◽  
C. Segel ◽  
A. Weidner ◽  
H. Biermann ◽  
A. Yu. Vinogradov
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Acoustic Emission ◽  
Twip Steels ◽  
Scanning Electron

scholarly journals Curing kinetics of phenolphthalein based polyphosphazene towards thermal stability and flame retardancy of polybenzoxazine

RSC Advances ◽  
2019 ◽  
Vol 9 (54) ◽  
pp. 31583-31593 ◽  
Author(s):  
Ling Zhao ◽  
Chunxia Zhao ◽  
Min Wu ◽  
Yuntao Li ◽  
Hui Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thermal Stability ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Flame Retardancy ◽  
Curing Kinetics ◽  
Ultrasound Assisted ◽  
Kinetics Of ◽  
Polymerization Method ◽  
Scanning Electron

Phenolphthalein type polyphosphazene (PZPT) microspheres were synthesized by an ultrasound assisted precipitation polymerization method, and their structures were confirmed by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy.

Microstructure and Fatigue Fracture of Spot Welded TRIP800 Steel

2015 ◽  
Vol 789-790 ◽  
pp. 15-19 ◽  
Author(s):  
Hua Wu ◽  
Bin Zhao ◽  
Hua Gao ◽  
Zhen Bo Zhao ◽  
Cheng Liu
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fatigue Crack ◽  
Fatigue Strength ◽  
Cleavage Fracture ◽  
Heat Affected Zone ◽  
Spot Welding ◽  
Fatigue Property ◽  
Transformation Induced Plasticity ◽  
Scanning Electron

The fatigue property of a TRIP (transformation induced plasticity) steel after resistance spot welding (RSW) is investigated. It is found that the fatigue strength of the spot weld is only 8.9% of the original TRIP800 steel. This is a result of microstructure mismatch in heat affected zone (HAZ) due to different cooling rates during RSW. A maximum variation of about 220HV microhardness is observed at different areas from the relatively narrow HAZ. The fatigue degradation is attributed to the inhomogeneous distributions of microstructure and microhardness at HAZ and its adjacent zones. The fatigue crack initiated between HAZ and BM is a cleavage fracture as confirmed by scanning electron microscopy (SEM) observation.

scholarly journals Wettability of Copper Coated Carbon Fibers

1994 ◽  
Vol 3 (4) ◽  
pp. 096369359400300
Author(s):  
G. Carotenuto ◽  
A. Gallo ◽  
L. Nicolais
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Solid Surface ◽  
Fiber Surface ◽  
Wetting Kinetics ◽  
Coated Carbon ◽  
Kinetics Of ◽  
Scanning Electron

The wetting kinetics of a solid surface by a molten metal decrease with increase of its roughness. The topography of the growing copper coating, produced on carbon fiber surface by electroplating from a sulphat bath, has been studied by scanning electron microscopy. The smoothes surface is produced after 200÷300 milliampere-hour of plating.

scholarly journals A study of the kinetics of topochemical reactions by scanning electron microscopy

Scanning ◽  
2006 ◽  
Vol 17 (6) ◽  
pp. 371-376 ◽  
Author(s):  
I. V. Melikhov ◽  
A. L. Nikolaev ◽  
V. E. Bozhevolnov ◽  
L. N. Ivanov ◽  
E. D. Kozlovskaya ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Topochemical Reactions ◽  
Kinetics Of ◽  
Scanning Electron
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