✦ LIBER ✦

Comment on fatigue properties of carbon- and porous-coated Ti-6Al-4V alloy

✍ Scribed by Andersen, Phillip J. ;Jacobs, Carl H. ;Crowninshield, Roy D. ;Parr, Jack E.

Publisher: John Wiley and Sons
Year: 1985
Tongue: English
Weight: 271 KB
Volume: 19
Category: Article
ISSN: 0021-9304
DOI: 10.1002/jbm.820190513

No coin nor oath required. For personal study only.

✦ Synopsis

The general topic of fatigue in implant materials and in Ti-6A1-4V alloy systems specifically is of great concert to researchers, producers, surgeons, and patients. Any thorough evaluation is always welcome. However, there are a few points made in the article that must be clarified.

The authors state, "In order to fabricate porous-coated devices suitable for bone ingrowth, it has been shown that Ti-6A1-4V alloy systems must be heat treated above the material's beta transus (992 'C)."' This is, unfortunately, not true.

The gravity sintering process employed by Cook et al., is, indeed, controlled by sintering temperature, time, and atmosphere. However, it is possible to bond Ti-6A1-4V (and other titanium alloys) well below the beta transus by the simultaneous application of pressure and temperature. This process, known as diffusion bonding, is being used by the aerospace industry. Diffusion bonding provides high integrity joints without the transformation to the lamellar alpha-beta structure discussed in the article. 497-512 (1984)l.

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