scholarly journals Formation of Surface Nano- and Textured Austenite Induced by Pulsed Electron Beam Irradiation under Melting Mode

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
K. M. Zhang ◽  
J. X. Zou
Keyword(s):  
Electron Beam ◽  
Niti Alloy ◽  
Austenite Formation ◽  
Surface Layers ◽  
Interesting Phenomenon ◽  
Pulsed Electron Beam ◽  
Aisi D2 ◽  
Modified Surface ◽  
D2 Steel ◽  
Modified Surface Layer

We report in this paper an interesting phenomenon associated with low-energy high-current pulsed electron beam (LEHCPEB) treatment: surface nanograined and textured austenite formation under the melting treatment mode. The treatment induces superfast heating and melting followed by a rapid solidification and cooling of the material surfaces. As a result, nano-structured surface layers can be achieved quite easily. Examples of nanoaustenite formation with special texture state in the modified surface layer of AISI D2 steel and NiTi alloy will show the potential for surface nanocrystallization of materials with improved properties by LEHCPEB technique.

Microstructures and phase formations in the surface layer of an AISI D2 steel treated with pulsed electron beam

2007 ◽  
Vol 434-435 ◽  
pp. 707-709 ◽  
Author(s):  
J.X. Zou ◽  
T. Grosdidier ◽  
K.M. Zhang ◽  
B. Gao ◽  
S.Z. Hao ◽  
...  
Keyword(s):  
Surface Layer ◽  
Electron Beam ◽  
Aisi D2 Steel ◽  
Pulsed Electron Beam ◽  
Aisi D2 ◽  
D2 Steel

Crater-formation-induced metastable structure in an AISI D2 steel treated with a pulsed electron beam

Vacuum ◽  
2012 ◽  
Vol 86 (9) ◽  
pp. 1273-1277 ◽  
Author(s):  
Kemin Zhang ◽  
Jianxin Zou ◽  
Thierry Grosdidier ◽  
Chuang Dong
Keyword(s):  
Electron Beam ◽  
Crater Formation ◽  
Aisi D2 Steel ◽  
Pulsed Electron Beam ◽  
Metastable Structure ◽  
Aisi D2 ◽  
D2 Steel

Influence of High Current Pulsed Electron Beam (HCPEB) Treatment on Wear Resistance of Hypereutectic Al-17.5Si and Al-20Si Alloys

2011 ◽  
Vol 675-677 ◽  
pp. 693-696 ◽  
Author(s):  
Y. Hao ◽  
Bo Gao ◽  
Gan Feng Tu ◽  
Z. Wang ◽  
Sheng Zhi Hao
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Electron Beam ◽  
Supersaturated Solid Solution ◽  
High Current ◽  
Pulsed Electron Beam ◽  
Primary Si ◽  
Modified Surface ◽  
Positive Effect ◽  
Modified Surface Layer

The paper reports an analysis of the effect of high current pulsed electron beam(HCPEB) on microstructure transformations and wear resistance of hypereutectic Al-Si alloys. HCPEB treatment with 2.5 J /cm2 energy density leads to the formation of “halo” centered on primary Si, composition homogeneity, the formation of supersaturated solid solution of Al and grain refinement of top melted surface layer. The wear resistance of 15 pulse-treated Al-17.5Si and Al-20Si alloys is drastically improved by a factor of 6.5 and 2, respectively. The increase of hardness in modified surface layer has a positive effect on wear of hypereutectic Al-Si alloys.

Texture and Microstructure at the Surface of an AISI D2 Steel Treated by High Current Pulsed Electron Beam

2007 ◽  
Vol 38 (9) ◽  
pp. 2061-2071 ◽  
Author(s):  
J.X. Zou ◽  
T. Grosdidier ◽  
B. Bolle ◽  
K.M. Zhang ◽  
C. Dong
Keyword(s):  
Electron Beam ◽  
High Current ◽  
Aisi D2 Steel ◽  
Pulsed Electron Beam ◽  
Aisi D2 ◽  
D2 Steel

scholarly journals Nanocrystallization of Coarse Primary Phases in Al- and Mg-Based Alloys Induced by HCPEB Treatment

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Gao Bo ◽  
He Jidong ◽  
Tu Ganfeng ◽  
Hu Liang
Keyword(s):  
Primary Phase ◽  
High Current ◽  
Nanostructured Surface ◽  
Surface Layers ◽  
Pulsed Electron Beam ◽  
Surface Nanocrystallization ◽  
Modified Surface ◽  
Multiple Pulses ◽  
And Diffusion ◽  
Modified Surface Layer

This paper reports on a phenomenon associated with high-current pulsed electron beam (HCPEB) treatment: surface nanocrystallization of coarse primary phase in hypereutectic Al17.5Si and quasicrystal alloys after multiple pulses of HCPEB irradiation. The HCPEB treatment induces superfast heating and diffusion of alloying elements and heterogeneous nucleation in a melting solution, followed by rapid solidification and cooling of the material surfaces. Consequently, nanostructured surface layers can be achieved easily. Nano-Si phase and nano-quasicrystal phase formation on the modified surface layer of hypereutectic Al17.5Si alloy and quasicrystal alloy (Mg37Zn60Y3) show a potential for surface nanocrystallization of materials with enhanced properties by HCPEB treatment.

scholarly journals Nanostructure Formations and Improvement in Corrosion Resistance of Steels by Means of Pulsed Electron Beam Surface Treatment

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
K. M. Zhang ◽  
J. X. Zou ◽  
T. Grosdidier
Keyword(s):  
Corrosion Resistance ◽  
Electron Beam ◽  
Surface Treatment ◽  
316L Stainless Steel ◽  
Aisi 316L Stainless Steel ◽  
Pulsed Electron Beam ◽  
Treatment Techniques ◽  
Beam Surface ◽  
Low Costs ◽  
D2 Steel

The corrosion of steels has long been the topic for materials scientists. It is established that surface treatment is an efficient way to improve the corrosion resistance of steels without changing the bulk properties and with low costs. In the present paper, different kinds of surface treatment techniques for steels are briefly reviewed. In particular, the surface modification involving nanostructure formations of steels by using a low energy high pulsed electron beam (LEHCPEB) treatment is lightened in the case of an AISI 316L stainless steel and D2 steel. The overall results demonstrate the high potential of the LEHCPEB technique for improving the corrosion performance of steels.

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