Ti surface alloying of an AISI 316L stainless steel by low energy high current pulsed electron beam treatment

2008 ◽  
Vol 26 (6) ◽  
pp. 1407-1414 ◽  
Author(s):  
K. M. Zhang ◽  
J. X. Zou ◽  
T. Grosdidier ◽  
C. Dong ◽  
S. Weber
Keyword(s):  
Stainless Steel ◽  
Electron Beam ◽  
316L Stainless Steel ◽  
Low Energy ◽  
Electron Beam Treatment ◽  
Aisi 316L ◽  
High Current ◽  
Surface Alloying ◽  
Aisi 316L Stainless Steel ◽  
Pulsed Electron Beam

scholarly journals Surface Nanostructure Formations in an AISI 316L Stainless Steel Induced by Pulsed Electron Beam Treatment

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Yang Cai ◽  
Kemin Zhang ◽  
Zhimin Zhang ◽  
Jiawei Dong ◽  
Yuan Lei ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Electron Beam ◽  
316L Stainless Steel ◽  
Steel Substrate ◽  
Aisi 316L ◽  
Structural Refinement ◽  
Electron Backscattered Diffraction ◽  
Aisi 316L Stainless Steel ◽  
Pulsed Electron Beam ◽  
Average Grain Size

High current pulsed electron beam (HCPEB) is an efficient technique for surface modifications of metallic materials. In the present work, the formations of surface nanostructures in an AISI 316L stainless steel induced by direct HCPEB treatment and HCPEB alloying have been investigated. After HCPEB Ti alloying, the sample surface contained a mixture of the ferrite and austenite phases with an average grain size of about 90 nm, because the addition of Ti favors the formation of ferrite. In contrast, electron backscattered diffraction (EBSD) analyses revealed no structural refinement on the direct HCPEB treated sample. However, transmission electron microscope (TEM) observations showed that fine cells having an average size of 150 nm without misorientations, as well as nanosized carbide particles, were formed in the surface layer after the direct HCPEB treatment. The formation of nanostructures in the 316L stainless steel is therefore attributed to the rapid solidification and the generation of different phases other than the steel substrate in the melted layer.

Microstructure and Mechanical Properties of Electron Beam Deposits of AISI 316L Stainless Steel

2011 ◽  
Author(s):  
Liang Wang ◽  
Sergio D. Felicelli ◽  
Jacob Coleman ◽  
Rene Johnson ◽  
Karen M. B. Taminger ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Electron Beam ◽  
Process Parameters ◽  
316L Stainless Steel ◽  
Beam Current ◽  
Aisi 316L ◽  
Translation Speed ◽  
Aisi 316L Stainless Steel ◽  
Microstructure And Mechanical Properties

Electron beam freeform fabrication (EBF3) is a process that uses an electron beam and wire feedstock to fabricate metallic parts inside a vacuum chamber. In this study, single and multiple layer linear deposits of AISI 316L stainless steel were produced with the EBF3 machine at NASA Langley Research Center (LaRC). EBF3 process parameters, including beam current, translation speed, and wire feed rate, were investigated in order to consider their effects on the resulting steel deposit geometry, microstructure and mechanical properties. Results indicate that the EBF3 process can produce pore-free, fully dense material within the range of process parameters used in this study. The electron beam deposited stainless steel has a solidification microstructure with fine columnar grains within most parts of the deposit due to the high cooling rate during the deposition, with some small homogeneous equiaxed grains at the top of the deposit. The mechanical properties of the deposits are comparable to those of wrought metal, which is attributed to the homogeneous fine-grained microstructure.

Sign in / Sign up

Export Citation Format

Share Document