Correlating Microstrain and Activated Slip Systems with Mechanical Properties within Rotary Swaged WNiCo Pseudoalloy

Strunz, Pavel; Kunčická, Lenka; Beran, Přemysl; Kocich, Radim; Hervoches, Charles

doi:10.3390/ma13010208

Open AccessArticle

Correlating Microstrain and Activated Slip Systems with Mechanical Properties within Rotary Swaged WNiCo Pseudoalloy

by

Pavel Strunz

^1,*

,

Lenka Kunčická

²,

Přemysl Beran

^1,3

,

Radim Kocich

² and

Charles Hervoches

¹

Nuclear Physics Institute of the CAS, 250 68 Řež, Czech Republic

²

Faculty of Materials Science and Technology, VŠB-Technical University of Ostrava, 708 00 Ostrava-Poruba, Czech Republic

³

European Spallation Source ERIC, 225 92 Lund, Sweden

^*

Author to whom correspondence should be addressed.

Materials 2020, 13(1), 208; https://doi.org/10.3390/ma13010208

Submission received: 27 September 2019 / Revised: 26 December 2019 / Accepted: 30 December 2019 / Published: 3 January 2020

(This article belongs to the Special Issue Mechanical Properties in Progressive Mechanically Processed Metallic Materials)

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Abstract

Due to their superb mechanical properties and high specific mass, tungsten heavy alloys are used in demanding applications, such as kinetic penetrators, gyroscope rotors, or radiation shielding. However, their structure, consisting of hard tungsten particles embedded in a soft matrix, makes the deformation processing a challenging task. This study focused on the characterization of deformation behavior during thermomechanical processing of a WNiCo tungsten heavy alloy (THA) via the method of rotary swaging at various temperatures. Emphasis is given to microstrain development and determination of the activated slip systems and dislocation density via neutron diffraction. The analyses showed that the grains of the NiCo2W matrix refined significantly after the deformation treatments. The microstrain was higher in the cold swaged sample (44.2 × 10⁻⁴). Both the samples swaged at 20 °C and 900 °C exhibited the activation of edge dislocations with <111> {110} or <110> {111} slip systems, and/or screw dislocations with <110> slip system in the NiCo2W matrix. Dislocation densities were determined and the results were correlated with the final mechanical properties of the swaged bars.

Keywords: tungsten; rotary swaging; neutron diffraction; dislocations; microstrain

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MDPI and ACS Style

Strunz, P.; Kunčická, L.; Beran, P.; Kocich, R.; Hervoches, C. Correlating Microstrain and Activated Slip Systems with Mechanical Properties within Rotary Swaged WNiCo Pseudoalloy. Materials 2020, 13, 208. https://doi.org/10.3390/ma13010208

AMA Style

Strunz P, Kunčická L, Beran P, Kocich R, Hervoches C. Correlating Microstrain and Activated Slip Systems with Mechanical Properties within Rotary Swaged WNiCo Pseudoalloy. Materials. 2020; 13(1):208. https://doi.org/10.3390/ma13010208

Chicago/Turabian Style

Strunz, Pavel, Lenka Kunčická, Přemysl Beran, Radim Kocich, and Charles Hervoches. 2020. "Correlating Microstrain and Activated Slip Systems with Mechanical Properties within Rotary Swaged WNiCo Pseudoalloy" Materials 13, no. 1: 208. https://doi.org/10.3390/ma13010208

APA Style

Strunz, P., Kunčická, L., Beran, P., Kocich, R., & Hervoches, C. (2020). Correlating Microstrain and Activated Slip Systems with Mechanical Properties within Rotary Swaged WNiCo Pseudoalloy. Materials, 13(1), 208. https://doi.org/10.3390/ma13010208

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Correlating Microstrain and Activated Slip Systems with Mechanical Properties within Rotary Swaged WNiCo Pseudoalloy

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