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effect of gamma irradiation on the friction and wear of ultrahigh molecular weight polyethyleneThe effect of sterilization gamma irradiation on the friction and wear properties of ultrahigh molecular weight polyethylene (UHMWPE) sliding against stainless steel 316L in dry air at 23 C is investigated, the results to be used in the development of artificial joints which are to surgically replace diseased human joints. A pin-on-disk sliding friction apparatus is used, a constant sliding speed in the range 0.061-0.27 m/s is maintained, a normal load of 1 kgf is applied with dead weight, and the irradiation dose levels are: 0, 2.5, and 5.0 Mrad. Wear and friction data and conditions for each of the ten tests are summarized, and include: (1) wear volume as a function of the sliding distance for the irradiation levels, (2) incremental wear rate, and (3) coefficient of friction as a function of the sliding distance. It is shown that (1) the friction and wear properties of UHMWPE are not significantly changed by the irradiation doses of 2.5 and 5.0 Mrad, (2) the irradiation increases the amount of insoluble gel as well as the amount of low molecular weight material, and (3) after run-in the wear rate is either steady or gradually decreases as a function of the sliding distance.
Document ID
19820027139
Document Type
Reprint (Version printed in journal)
Authors
Jones, W. R.
(NASA Lewis Research Center Cleveland, OH, United States)
Hady, W. F.
(NASA Lewis Research Center Cleveland, OH, United States)
Crugnola, A.
(Lowell, University Lowell, MA, United States)
Date Acquired
August 10, 2013
Publication Date
July 15, 1981
Publication Information
Publication: Wear
Volume: 70
Subject Category
NONMETALLIC MATERIALS
Distribution Limits
Public
Copyright
Other