The grain boundary design was used to introduce boride Ti2B and TiB2nanoparticles of 5 nm in size into grain boundaries of nanocrystalline Ti50Ni25Cu25alloy.As a result,the maximum normalized microhardness was increas...The grain boundary design was used to introduce boride Ti2B and TiB2nanoparticles of 5 nm in size into grain boundaries of nanocrystalline Ti50Ni25Cu25alloy.As a result,the maximum normalized microhardness was increased by 20%and the theoretical limit of hardness is substantially approached.It is proposed that boride nanoparticles suppressed low-temperature grain-boundary sliding and,therefore,shifted the range of the anomalous behavior of Hall-Petch relation toward smaller sizes of the Ti-Ni-Cu nanocrystals.展开更多
基金supported by the Russian Foundation for Basic Research(project Nos.13-02-12087 and 14-0231284)
文摘The grain boundary design was used to introduce boride Ti2B and TiB2nanoparticles of 5 nm in size into grain boundaries of nanocrystalline Ti50Ni25Cu25alloy.As a result,the maximum normalized microhardness was increased by 20%and the theoretical limit of hardness is substantially approached.It is proposed that boride nanoparticles suppressed low-temperature grain-boundary sliding and,therefore,shifted the range of the anomalous behavior of Hall-Petch relation toward smaller sizes of the Ti-Ni-Cu nanocrystals.
