<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>This paper presents the results of the studies of the structure and properties of ultrafine grained nickel 200 obtained by hydrostatic extrusion processes. Microstructure was characterized by means of optical microscopy and electron transmission microscopy. Corrosion resistance was studied by impedance and potentiodynamic methods using an AutoLab PGSTAT 100 potentiostat in 0.1 M Na2SO4 solution and in acidified (by addition of H2SO4) 0.1 M NaCl solution at pH = 4.2 at room temperature. Microhardness tests were also performed. The results showed that hydrostatic extrusion produces a heterogeneous, ultrafine-grained microstructure in nickel 200. The corrosive resistance tests showed that the grain refinement by hydrostatic extrusion is accompanied by a decreased corrosive resistance of nickel 200.</p></abstract>

This paper presents the results of the studies of the structure and properties of ultrafine grained nickel 200 obtained by hydrostatic extrusion processes. Microstructure was characterized by means of optical microscopy and electron transmission microscopy. Corrosion resistance was studied by impedance and potentiodynamic methods using an AutoLab PGSTAT 100 potentiostat in 0.1 M Na2SO4 solution and in acidified (by addition of H2SO4) 0.1 M NaCl solution at pH = 4.2 at room temperature. Microhardness tests were also performed. The results showed that hydrostatic extrusion produces a heterogeneous, ultrafine-grained microstructure in nickel 200. The corrosive resistance tests showed that the grain refinement by hydrostatic extrusion is accompanied by a decreased corrosive resistance of nickel 200.

Microstructure and properties of ultrafine grain nickel 200 after hydrostatic extrusion processes

Faculty of Materials Science and Engineering, Warsaw University of Technology, Woloska 141 Str., 02-507, Warsaw, Poland

Institute of High Pressure Physics, Polish Academy of Science, Sokolowska 29/37 Str., 01-142, Warsaw, Poland

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

This paper presents the results of the studies of the structure and properties of ultrafine grained nickel 200 obtained by hydrostatic extrusion processes....

Microstructure and properties of ultrafine grain nickel 200 after hydrostatic extrusion processes

Pubblicato online: 14 set 2012

Pagine: 282 - 289

DOI: https://doi.org/10.2478/s13536-012-0038-8

Parole chiave
nickel 200, hydrostatic extrusion process, ultrafine grained microstructure, corrosive resistance

© 2012 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Microstructure and properties of ultrafine grain nickel 200 after hydrostatic extrusion processes

Pubblicato online: 14 set 2012

Pagine: 282 - 289

DOI: https://doi.org/10.2478/s13536-012-0038-8

Parole chiavenickel 200, hydrostatic extrusion process, ultrafine grained microstructure, corrosive resistance

© 2012 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Parole chiave
nickel 200, hydrostatic extrusion process, ultrafine grained microstructure, corrosive resistance