scholarly journals Microstructural Study of the Surface Layers Irradiated by High-Energy Electron Beam in a Plain Carbon Steel

1996 ◽  
Vol 37 (3) ◽  
pp. 309-313 ◽  
Author(s):  
Dongwoo Suh ◽  
Sunghak Lee ◽  
Yangmo Koo
Keyword(s):  
Electron Beam ◽  
Carbon Steel ◽  
High Energy ◽  
Plain Carbon Steel ◽  
Energy Electron ◽  
High Energy Electron ◽  
Surface Layers ◽  
Microstructural Study

Microstructural and Mechanical Properties of TiC, TiB2 and VC with Low Carbon Steel Surface Alloy Fabricated by High Energy Electron Beam Irradiation

2005 ◽  
Vol 475-479 ◽  
pp. 3927-3930
Author(s):  
Kee Sam Shin ◽  
Jung Hoon Yoo ◽  
Sung Hak Lee ◽  
Kenji Kaneko ◽  
Yoshitsugu Tomokiyo
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Carbon Steel ◽  
Irradiation Time ◽  
Low Carbon Steel ◽  
High Energy ◽  
Energy Electron ◽  
Low Carbon ◽  
High Energy Electron ◽  
The Matrix

Because of its excellent process advantages such as high energy efficiency, short irradiation time and rapid heating, high energy electron beam (HEEB) irradiation is becoming of interest as a future surface modification technology. In this study, surface alloying of TiC, TiB2 and VC ceramic particles with a low carbon steel substrate was carried out using HEEB of 1.4 MeV. Surface alloyed layers of all the specimens were about 2 mm thick and consisted of a melted region, an interface region, a heat affected zone (HAZ) and the matrix. In all the specimens, the hardness at the surface was the highest, and then decreased sharply into the interior reaching the lowest values at the matrix. A remarkable increase in the mechanical properties was observed for the VC surface alloyed specimen. Vanadium carbides of large (~ 5 µm) and fine sizes (~ 20 nm) were formed uniformly, which resulted in an increase of hardness to 2-3 times of that of the matrix, and highest wear resistance.

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