High fracture toughness in a hierarchical nanostructured zirconium
High fracture toughness in a hierarchical nanostructured zirconium
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分级纳米结构锆具有高断裂韧性
DOI:
10.1016/j.msea.2014.03.110
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发表时间:
2014-06
期刊:
影响因子:
--
通讯作者:
Ming Li, Defeng Guo, Tengyun Ma, Guosheng Zhang,
中科院分区:
文献类型:
--
作者:
Ming Li, Defeng Guo, Tengyun Ma, Guosheng Zhang,
Nanocrystalline metals usually exhibit a high strength but a disappointingly low ductility and toughness, which limit their practical utility. Here, we report a high fracture toughness (KIC~117 MPa m1/2) in a hierarchical nanostructured Zr that consists of nano-, sub-micrometer- and micrometer-sized grains, which is much larger than thatKIC~78 MPa m1/2in coarse-grained Zr. This hierarchical nanostructured Zr shows a good combination of yield strength (σs~550 MPa) and fracture toughness as compared with its coarse-grained counterpart. We expect that these results will have implications in the enhancement of fracture toughness of nanocrystalline materials and in the design of high-performance structural materials.
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DOI:
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发表时间:
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期刊:
--
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