Fully dense nanocrystalline nickel by severe plastic deformation consolidation

被引：3

作者：

Mishra, RS ^{[1
]}

Valiev, RZ ^{[1
]}

Mukherjee, AK ^{[1
]}

机构：

[1] RUSSIAN ACAD SCI, INST MET SUPERPLAST PROBLEMS, UFA 450001, RUSSIA

来源：

METASTABLE, MECHANICALLY ALLOYED AND NANOCRYSTALLINE MATERIALS, PTS 1 AND 2 | 1996年 / 225卷

关键词：

nickel; nanocrystalline; severe plastic deformation; consolidation; hardness;

D O I：

10.4028/www.scientific.net/MSF.225-227.605

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fully dense nanocrystalline nickel has been consolidated by severe plastic deformation consolidation (SPDC) of ball milled powders. The consolidated discs had a theoretical density of similar to 95% of bulk coarse grained nickel and an average grain size of similar to 17 nm. Transmission electron microscopy revealed no porosity and therefore, the specimens can be considered fully dense in the conventional usage of the term. The microhardness of as consolidated nanocrystalline nickel was 8.1 +/- 0.15 GPa and it increased to 8.6 +/- 0.17 GPa after heat-treatment at 473 K for 1 h. Heat-treatment at 673 K for 1 h resulted in a decrease of the microhardness to 4.4 +/- 0.4 GPa, indicating grain growth.

引用

页码：605 / 610

页数：6

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