期刊
SCRIPTA MATERIALIA
卷 59, 期 5, 页码 546-549出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.05.003
关键词
nanocrystalline materials; surface mechanical grinding treatment (SMGT); gradient nano-micro-structure; copper
By using a novel surface nanocrystallization technique, surface mechanical grinding treatment at cryogenic temperatures, we synthesized a gradient nano-micro-structure in the surface layer of bulk pure copper. The average grain sizes vary from about 22 nm in the topmost surface to sub-micrometers at about 200 mu m deep, corresponding to a gradient change in hardness from 2.1 to 1.1 GPa in the coarse-grained matrix. (c) 2008 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
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