Shock consolidation of nanopowdered Ni

被引：12

作者：

Emelchenko, G. A. ^{[2
]}

Naumenko, I. G. ^{[2
]}

Veretennikov, V. A. ^{[1
]}

Gordopolov, Yu A. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Struct Macrokinet & Mat Sci, Moscow 142432, Russia

[2] Russian Acad Sci, Inst Solid State Phys, Moscow 142432, Russia

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 503卷 / 1-2期

关键词：

Nanopowders; Shock consolidation; Nano-grained Ni;

D O I：

10.1016/j.msea.2008.01.097

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We investigated the effect of shock compression followed by thermal treatment on the mechanical properties of resultant massive nano-grained nickel. Shock-assisted compaction (P> 3 GPa, largely shear deformation) of Ni powder (dislocation-free spherical particles with (d) over bar = 56 nm) was found to produce the theoretical density in the resultant bulk Ni. Isothermal annealing of shock-compacted samples (at 600 degrees C for 15 min) led to some increase in the bending strength sigma(tau), (to 950-1000 MPa) and insignificant decrease in the hardness H-RC (down to 45), without any noticeable change in the grain size. Upsetting of non-annealed samples at 600 degrees C gave the bending strength sigma(tau) = 1050-1100 MPa. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：55 / 57

页数：3

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