Grindability of alpha-case formed on cast titanium.

Abstract:

:The hardened alpha-case (alpha-case) layer inevitably forms on the surface of titanium castings when prepared by investment casting. Because the hardness of the alpha-case is incomparable to that of the interior structure, the perception exists that the alpha-case is difficult to remove during cutting, grinding and polishing. Grindability (ease of grinding) of cast cpTi and cast Ti-6Al-4V was evaluated by grinding cast specimens incrementally using a SiC abrasive wheel. The present study revealed that the presence of the brittle alpha-case with lower fracture toughness is beneficial in grinding titanium. The alpha-case on the ductile cpTi can be ground much easier than its bulk interior structure. In less ductile Ti-6Al-4V, the grinding rate is much higher than that of cpTi, and the alpha-case and its interior structure are at similar levels since the fracture toughness of its alpha-case and the bulk material is not large enough.

journal_name

Dent Mater J

journal_title

Dental materials journal

authors

Koike M,Jacobson D,Chan KS,Okabe T

doi

10.4012/dmj.28.587

subject

Has Abstract

pub_date

2009-09-01 00:00:00

pages

587-94

issue

5

eissn

0287-4547

issn

1881-1361

pii

JST.JSTAGE/dmj/28.587

journal_volume

28

pub_type

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