Effects of ultra-high purification and addition of interstitial elements on properties of pure titanium and titanium alloy

Various properties of pure titanium and titanium alloys with ultra- high purity prepared by melting raw titanium made by improved iodide process have been examined. Effects of oxygen, nitrogen and carbon addition to pure titanium and SP-700 alloy on tensile properties were investigated, and strength...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 1998-03, Vol.243 (1), p.186-195
Main Authors: Ouchi, C, Iizumi, H, Mitao, S
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Deformation, plasticity, and creep
Electric resistivity
Exact sciences and technology
Interstitial elements
Materials science
Materials synthesis
materials processing
Metals. Metallurgy
Physics
Purification
SP-700 alloy
Strength
Treatment of materials and its effects on microstructure and properties
Ultra-high purity titanium
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Summary:Various properties of pure titanium and titanium alloys with ultra- high purity prepared by melting raw titanium made by improved iodide process have been examined. Effects of oxygen, nitrogen and carbon addition to pure titanium and SP-700 alloy on tensile properties were investigated, and strengthening effect and ductility variation due to these elements were evaluated. The strength of pure titanium and SP-700 alloy markedly decreased with the increase of purity, the yield strength of pure titanium containing oxygen of 40 ppm being reduced to 100 MPa. The recrystallization temperature of cold rolled ultra-high purity titanium was extremely low, 553 K, a small amount of oxygen and iron doping markedly increased this temperature.
ISSN:0921-5093
1873-4936
DOI:10.1016/S0921-5093(97)00799-5