材料科学
严重塑性变形
钛
变形(气象学)
冶金
可塑性
粒度
复合材料
作者
Yuri Estrin,Rimma Lapovok,Alexander E. Medvedev,Cornelia Kasper,Elena P. Ivanova,Terry C. Lowe
出处
期刊:Elsevier eBooks
[Elsevier]
日期:2018-01-01
卷期号:: 419-454
被引量:13
标识
DOI:10.1016/b978-0-12-812456-7.00019-6
摘要
In a quest for implant materials with low or zero toxicity, the medical community and materials scientists are turning their attention to pure titanium as an alternative to titanium alloys. The loss of mechanical strength due to the deliberate relinquishment of alloying effects can be compensated for by extreme grain refinement that can be produced by severe plastic deformation (SPD) of Ti. We discuss the effects of SPD processing on the mechanical property profile of Ti, focusing on strength and fatigue properties. Of equal significance are the effects of SPD processing on the biological responses of commercially pure Ti in physiological environments. It is demonstrated that the attachment and proliferation of osteoblast cells and mesenchymal stem cells is promoted by SPD processing. On the flip side, growth of Gram-positive and Gram-negative bacteria is accelerated as well. These effects are discussed and interpreted in terms of the surface characteristics of the SPD-processed Ti.
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