Ballistic Performance of Zr-Based Bulk Metallic Glass/Ti Surface Composites Fabricated by High-Energy Electron-Beam Irradiation

2010 ◽  
Vol 654-656 ◽  
pp. 2700-2703
Author(s):  
Jeong Hyeon Do ◽  
Chang Woo Jeon ◽  
Duk Hyun Nam ◽  
Choong Nyun Paul Kim ◽  
Young Bum Song ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Composite Plates ◽  
High Energy ◽  
High Energy Electron ◽  
Beam Irradiation ◽  
Ballistic Performance ◽  
Surface Composite ◽  
Surface Composites ◽  
Composite Layers

This study aimed at investigating the ballistic performance of Zr-based bulk metallic glass/Ti surface composites fabricated by high-energy electron-beam irradiation. The ballistic impact test was conducted on surface composite plates to evaluate the ballistic performance. Since the surface composite layers were observed to block effectively a fast traveling projectile, while many cracks were formed in the composite layers, the surface composite plates were not perforated. The surface composite layer containing ductile β dendritic phases showed the better ballistic performance than the one without containing dendrites because dendritic phases could hinder the propagation of shear bands or cracks.

Improvement of Hardness and Wear Resistance of Steel-Based Surface Composites Fabricated by High-Energy Electron Beam Irradiation

2007 ◽  
Vol 345-346 ◽  
pp. 637-640
Author(s):  
Duk Hyun Nam ◽  
Kyu Hong Lee ◽  
Sung Hak Lee
Keyword(s):  
Wear Resistance ◽  
Electron Beam ◽  
Carbon Steel ◽  
Electron Beam Irradiation ◽  
Steel Substrate ◽  
High Energy ◽  
High Energy Electron ◽  
Beam Irradiation ◽  
Surface Composite ◽  
Surface Composites

The present study is concerned with the improvement of hardness and wear resistance in (Cr3C2,CrB)/carbon steel surface composites fabricated by high-energy electron beam irradiation. Two kinds of powder mixtures, 50Cr3C2-50STS304 and 50CrB-50STS304 (wt.%), were placed on a plain carbon steel substrate, which was then irradiated with electron beam. The surface composite layer of 1.0~1.3 mm in thickness was successfully formed without defects, and contained a large amount (up to 58 vol.%) of Cr7C3 or Cr1.65Fe0.35B0.9 particles in the austenite or martensite matrix. The hardness and wear resistance of the surface composites were 2~3 times higher than those of the steel substrate according to hard particles. Particularly, the surface composite fabricated with CrB powders showed excellent wear resistance because selective wear of the matrix was considerably reduced.

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