期刊
MATERIALS TRANSACTIONS
卷 56, 期 1, 页码 154-159出版社
JAPAN INST METALS
DOI: 10.2320/matertrans.M2014280
关键词
harmonic structure; pure titanium; severe plastic deformation; powder metallurgy; jet mill; mechanical properties; strength; ductility absorbed energy; heterogeneous
资金
- Japan Science and Technology Agency (JST)
- MEXT, Japan [22102004]
Through many years, conventional material developments have emphasized on microstructural refinement and homogeneity. However, Nano- and Homogeneous microstructures do not, usually, satisfy the need to be both strong and ductile, due to the plastic instability in the early stage of the deformation. As opposed to such a nano- and homo-microstructure design, we have proposed Harmonic Structure design. The harmonic structure has a heterogeneous microstructure consisting of bimodal grain size together with a controlled and specific topological distribution of fine and coarse grains. In other words, the harmonic structure is heterogeneous on micro- but homogeneous on macro-scales. In the present work, the harmonic structure design has been applied to pure-Ti via a novel powder metallurgy route consisting of controlled severe plastic deformation of the fine-sized powder particles via jet milling and subsequent consolidation by SPS. At a macro-scale, the harmonic structure materials exhibited significantly better combination of strength and ductility, under quasi-static tensile loadings, as compared to their homogeneous microstructure counterparts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据