Microstructure and property modifications in a near α Ti alloy induced by pulsed electron beam surface treatment

• Published in: Surface & coatings technology Vol. 206; no. 2-3; pp. 295 - 304
• Main Authors: Zhang, X.D., Zou, J.X., Weber, S., Hao, S.Z., Dong, C., Grosdidier, T.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 25.10.2011; Elsevier
• Subjects: Aluminum; Applied sciences; Coatings; Corrosion; Corrosion environments; Cross-disciplinary physics: materials science; rheology; Electron beams; Evaporation; Exact sciences and technology; Hardness; Low energy high current pulsed electron beam (LEHCPEB); Materials science; Metals. Metallurgy; Microstructure; Phase transformation; Physics; Surface treatment; Surface treatments; Ti alloy; Titanium base alloys; Transformations; Phase transformation; Low energy high current pulsed electron beam (LEHCPEB); Corrosion; Hardness; Ti alloy; Phase transformations; Electron beam; Surface treatments; Microstructure
• ISSN: 0257-8972; 1879-3347
• DOI: 10.1016/j.surfcoat.2011.07.017

The effect of the low energy high current pulsed electron beam (LEHCPEB) surface treatment on the microstructure and properties of a near α Ti alloy have been investigated. Both the melted layer and solid state transformation layer of the LEHCPEB treated samples contained α’ martensite. The size of the former β grains suggests a cooling rate of about 107Ks−1. Selective Al evaporation occurred at the top surface of the melted layer and affected both surface hardness and corrosion properties. ► One kind of near α Ti alloy has been treated with high current pulsed electron beam technique. ► The melted layer and solid state transformation layer of treated samples contained α’ martensite. ► The cooling rate was estimated from the size of the prior-β grains. ► Microhardness and corrosion properties of treated samples have been characterized.