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Metallurgical Characteristics of Titanium-Alloy Foil Prepared by Electron-Beam Evaporation

 

作者: H. R. Smith,   K. Kennedy,   F. S. Boericke,  

 

期刊: Journal of Vacuum Science and Technology  (AIP Available online 1970)
卷期: Volume 7, issue 6  

页码: 48-51

 

ISSN:0022-5355

 

年代: 1970

 

DOI:10.1116/1.1315919

 

出版商: American Vacuum Society

 

数据来源: AIP

 

摘要:

The supersonic titanium aircraft has requirements for high-strength titanium-alloy foil for honeycomb structures. In conventional rolling of such alloys as titanium-6% aluminum-4% vanadium, multiple high-vacuum anneals are required to reach the thin-foil gages, from 0.001–0.004 in., used for honeycomb cores. The advantages of electron-beam evaporation and deposition in the desired thicknesses, and without rolling and multiple vacuum annealing, are studied. The present research program is designed to prove that foils of such alloys, produced by EB evaporation on a moving substrate, are equivalent to the rolled products. EB foils easily meet the chemical and mechanical property requirements of aerospace specifications. Bend tests are superior to the rolled foil. The metallurgical characteristics have been evaluated using optical micrography and electron micrography with replica, transmission, and scanning techniques. The deposits are fully dense and of grain sizes from 0.2–0.8 μ. Microprobe analyses indicate that the chemical composition is uniform and contains alpha and beta phases. All metallurgical characteristics of EB evaporated foils appear to be suitable for the intended end uses. Evaluations in the form of actual honeycomb structures are underway.

 

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