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Kwasny W.,Silesian University of Technology | Nuckowski P.,Silesian University of Technology | Rdzawski Z.,Silesian University of Technology | Rdzawski Z.,Non Ferrous Metals Institute | Gluchowski W.,Non Ferrous Metals Institute
Archives of Materials Science and Engineering | Year: 2013

Purpose: The goal of the study is try to find the influence of plastic deformation using the RCS (repetitive corrugation and straightening) process on the structure and mechanical properties of CuSn6 alloy. The influence of process parameters on the above property were investigated. Obtained results were correlated with the results obtained for alloy subjected to cold rolling. Design/methodology/approach: This study was aimed to investigate structure and mechanical properties non annealed strip of CuSn6 alloy, cold-rolled and the tape subjected to intensive plastic deformation using the RCS method (repetitive corrugation and straightening). Findings: Research have shown increase compressive stresses and tensile strength in material after RCS process compared to classic rolled. Crystallite size measurement confirmed the presence of nano-scale structures in the studied materials after deformation by RCS process. The used method of plastic deformation is promising for development materials with improved properties. Research limitations/implications: The research was carried out on samples, not on final elements. Practical implications: Research is moving towards the development of the materials with finest microstructure, known as ultra-fine-grained materials with improved properties, compared to currently known materials. Originality/value: This paper presents the results of study of the structure and mechanical properties CuSn6 alloy deformed in the RCS (repetitive corrugation and straightening) process. © International OCSCO World Press. All rights reserved. 2013.


Gluchowski W.J.,Non Ferrous Metals Institute | Rdzawski Z.M.,Silesian University of Technology | Stobrawa J.P.,Silesian University of Technology | Marszowski K.J.,Non Ferrous Metals Institute
Archives of Metallurgy and Materials | Year: 2014

Nowadays, there is much activity all over the world in development of Cu-Nb composites for their potential use as conductors in high field magnets. This study was aimed at investigation of microstructure, mechanical and electrical properties of Cu-Nb composite wires. The investigated materials have been processed by vacuum furnace melting and casting, and then hot forging and cold drawing. Initial results of research into Cu-Nb composite material obtained using repeated iterative drawing of niobium wires compacted into copper tube, have been also presented in this article. The ultimate tensile strength versus cold deformation degree has been presented. These changes have been discussed in relation to microstructure evolution. It was assumed that repeated drawing of compacted wires is a promising method for fibrous composite production (more than 823,000 Nb fibres of nanometric diameter) characterized by high mechanical properties and electrical conductivity. Original SPD technique applied for Cu-Nb composite deformation result in initial microstructure refinement and improves effectiveness of wire production process.


Gluchowski W.,Non Ferrous Metals Institute | Stobrawa J.,Non Ferrous Metals Institute | Stobrawa J.,Silesian University of Technology | Rdzawski Z.,Non Ferrous Metals Institute | And 2 more authors.
Materials Science Forum | Year: 2011

A growing trend to use new copper-based functional materials is observed recently world-wide. Within this group of materials particular attention is drawn to those with ultrafine grain size of a copper matrix. This study was aimed to investigate mechanical properties, electrical conductivity and microstructure in strips of precipitation strengthened copper alloys processed by continuous repetitive corrugation and straightening (CRCS). Tests were performed with the copper alloy strips using original die set construction installed on tensile testing machine. The microstructure was investigated using optical and electron microscopy (TEM and SEM equipped with EBSD). Proposition of semi industrial application of this method have been also presented. The CRCS process effectively reduced the grain size of a copper alloy strips, demonstrating the CRCS as a promising new method for producing ultra fine grained metallic strips. © (2011) Trans Tech Publications, Switzerland.


Stobrawa J.P.,Non Ferrous Metals Institute | Stobrawa J.P.,Silesian University of Technology | Rdzawski Z.M.,Non Ferrous Metals Institute | Rdzawski Z.M.,Silesian University of Technology | Gluchowski W.J.,Non Ferrous Metals Institute
Journal of Nanoscience and Nanotechnology | Year: 2012

Dispersion and precipitation strengthened copper alloys is a group of functional and structural materials used where combination of high electrical conductivity with high strength is required. A growing trend to use new copper-based functional materials is observed recently world-wide. Within this group of materials particular attention is drawn to those with ultra fine grain size of a copper matrix. This study was aimed to investigate mechanical properties, electrical conductivity and microstructure in Cu-yttria microcomposite produced by powder metallurgy methods and in CuCr0.6 alloy strips processed by continuous repetitive corrugation and straightening (CRCS). The changes of mechanical properties (HV, ultimate tensile strength, 0.2 yield strength) electrical conductivity as well as microstructure evolution versus true strain were investigated. The microstructure was investigated using optical and electron microscopy (HRTEM and SEM). Possibility of quenching elimination during processing has been also analysed. The Cu-yttria microcomposite produced by powder metallurgy methods and CRCS process of a CuCr0.6 alloys strips effectively reduced the grain size, demonstrating the powder metallurgy and CRCS as a promising new methods for producing nano and ultra fine grained copper matrix. Copyright © 2012 American Scientific Publishers All rights reserved.


Gluchowski W.,Non Ferrous Metals Institute | Stobrawa J.P.,Non Ferrous Metals Institute | Stobrawa J.P.,Silesian University of Technology | Rdzawski Z.M.,Non Ferrous Metals Institute | Rdzawski Z.M.,Silesian University of Technology
Archives of Materials Science and Engineering | Year: 2011

Purpose: A growing trend to use the new copper-based functional materials is observed recently world-wide. Ultrafine grained copper, solid solution hardened and age-hardened copper alloys are applied where combination of high electrical conductivity with high strength is required. Design/methodology/approach: This study was aimed to investigate microstructure in strips of copper alloys with different stacking fault energy value. The investigated materials have been processed by one of the severe plastic deformation method, using different variants of continuous repetitive corrugation and straightening (CRCS). Deformation was executed by parallel and perpendicular corrugation and straightening of strip sample. Findings: Continuous repetitive corrugation and straightening is a promising method for refining of microstructure of metallic strips. Practical implications: A growing trend to use new copper-based functional materials is observed recently world-wide. Within this group of materials particular attention is drawn to those with ultra fine or nanometric grain size. Originality/value: The paper contributes to the microstructure evolution of solid solution hardened and age-hardened copper alloys strips produced by original RCS method. © Copyright by International OCSCO World Press. All rights reserved 2011.

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