Surface modification of steels and magnesium alloy by high current pulsed electron beam

Hao, Shuai; Gao, Bo; Wu, Aimin; Zou, Jianxin; Qin, Ying; Chen, Dong; Jian, An; Guan, Qingfeng

doi:10.1016/j.nimb.2005.04.117

Cited by 94 publications

(47 citation statements)

References 8 publications

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“…Fo r examp le, imp roved surface properties of a Mg alloy (AZ91) have been achieved with the dispersion of hard metallic part icles such as TiC and SiC in the molten pool generated by laser melting [166,167]. Also, laser cladding of an Al-Si alloy onto a number of Mg alloys such as AS41, AZ91 and W E54 have also been attempted, but unfortunately, the surface properties were not significantly improved [168,169].…”

Section: Laser Surface Melting Alloying and Claddingmentioning

confidence: 99%

Biomedical Magnesium Alloys: A Review of Material Properties, Surface Modifications and Potential as a Biodegradable Orthopaedic Implant

Poinern¹,

Brundavanam²,

Fawcett³

2013

AJBE

283

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Magnesium and magnesium based alloys are lightweight metallic materials that are extremely biocompatib le and have similar mechanical properties to natural bone. These materials have the potential to function as an osteoconductive and biodegradable substitute in load bearing applicat ions in the field of hard t issue engineering. However, the effects of corrosion and degradation in the physiological environ ment of the body has prevented their wide spread applicat ion to date. The aim o f this review is to examine the properties, chemical stability, degradation in situ and methods of improving the corrosion resistance of magnesium and its alloys for potential application in the orthopaedic field. To be an effective imp lant, the surface and sub-surface properties of the material needs to be carefully selected so that the degradation kinetics of the implant can be efficiently controlled. Several surface modification techniques are presented and their effectiveness in reducing the corrosion rate and methods of controlling the degradation period are discussed. Ideally, balancing the gradual loss of material and mechanical strength during degradation, with the increasing strength and stability of the newly forming bone tissue is the ultimate goal. If this goal can be achieved, then orthopaedic implants manufactured fro m magnesium based alloys have the potential to deliver successful clinical outcomes without the need for revision surgery.

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Section: Laser Surface Melting Alloying and Claddingmentioning

confidence: 99%

Biomedical Magnesium Alloys: A Review of Material Properties, Surface Modifications and Potential as a Biodegradable Orthopaedic Implant

Poinern¹,

Brundavanam²,

Fawcett³

2013

AJBE

283

View full text Add to dashboard Cite

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“…Besides, stress waves, shock waves, vibration and other physical phenomena can also be induced on the material surface, which results in extraordinary modification effects, such as improved strength, microhardness, wear resistance and corrosion resistant properties [9][10][11] . Therefore, by using HCPEB surface modification techniques, many researchers had studied the surface strengthening and surface alloying of steels, magnesium alloys, aluminium alloys, etc 11 .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, by using HCPEB surface modification techniques, many researchers had studied the surface strengthening and surface alloying of steels, magnesium alloys, aluminium alloys, etc 11 . The failure of vacuum interrupter usually occurs on the surface of Cu-Cr contact materials during usage.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Liquid Phase Separation of CuCr Alloys Treated by High Current Pulsed Electron Beam

Zhou

Chai

et al. 2015

Mat. Res.

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“…Over the past decade, LAEB has been applied to polish and improve the corrosion behaviour of mould surfaces [17][18][19], improve surface hardness in steels and magnesium alloys [20], as well as the wear resistance of Al-Si alloys [21,22]. More relevant to the current work, Guan et al [23] have observed localised amorphisation in a simple low-carbon steel by this process, giving evidence that the high-cooling rates associated with this technique can be applied for amorphous layer preparation.…”

mentioning

confidence: 99%

Amorphous layer formation in Al86.0Co7.6Ce6.4 glass-forming alloy by large-area electron beam irradiation

Murray

Voisey

et al. 2013

Applied Surface Science

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Amorphous Al-Co-Ce alloys are of interest because of their resistance to corrosion, but high cooling rates are generally required to suppress the formation of crystalline phases. In this study, the surface of a bulk crystalline Al-Co-Ce alloy of a glass-forming composition was treated using large area electron beam (LAEB) irradiation. Scanning electron microscopy shows that, compared to the microstructure of the original crystalline material, the treated surface exhibits greatly improved microstructural and compositional uniformity. Glancing angle X-ray diffraction conducted on the surface of treated samples indicates the formation of the amorphous phase following 25 and 50 pulses at 35 kV cathode voltage. However, when the samples are treated with 100 and 150 pulses at 35 kV cathode voltage of electron beam irradiation, the treated layer comprises localised crystalline regions in an amorphous matrix.In addition, the formation of cracks in the treated layer is found to be localised around the Al 8 Co 2 Ce phase in the bulk material. Overall, crack length per unit area had no clear change with an increase in the number of pulses.

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Surface modification of steels and magnesium alloy by high current pulsed electron beam

Cited by 94 publications

References 8 publications

Biomedical Magnesium Alloys: A Review of Material Properties, Surface Modifications and Potential as a Biodegradable Orthopaedic Implant

Biomedical Magnesium Alloys: A Review of Material Properties, Surface Modifications and Potential as a Biodegradable Orthopaedic Implant

Microstructure and Liquid Phase Separation of CuCr Alloys Treated by High Current Pulsed Electron Beam

Amorphous layer formation in Al86.0Co7.6Ce6.4 glass-forming alloy by large-area electron beam irradiation

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