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A platform for research: civil engineering, architecture and urbanism
Solid-state welding of ultrafine grained copper rods
https://orcid.org/http://orcid.org/0000-0003-4238-376X
https://orcid.org/http://orcid.org/0000-0002-8341-0923
https://orcid.org/http://orcid.org/0000-0003-1527-5309
https://orcid.org/http://orcid.org/0000-0003-0002-8751
https://orcid.org/http://orcid.org/0000-0003-4250-8091
https://orcid.org/http://orcid.org/0000-0002-5399-4008
The article focuses on the Direct Drive Rotary Friction Welding of ultrafine-grained copper rods, which feature increased mechanical properties and good electrical properties, yet are limited in size. The use of UFG metals is often limited by the too small dimensions of semi-finished elements produced by SPD methods. Therefore, the production of finished machine parts from UFG metals is currently economically unjustified. Dismissal of dimensional limitations can be done by introducing joining to technological processes. The proposed joining method does not lead to a melting of the material in the joining zone or excessive degradation of the UFG microstructure. To obtain the best results, the research used the method of low-energy welding of two kinds of specimens: with a flat or a conical contact surface. In the article, the authors present, by means of metallographic microsections and microhardness measurements, the influence of rotational speed, welding pressure and conical shape contact surface on the quality of the obtained joints. The conducted research made it possible to obtain good quality joints whose microhardness is reduced only by about 10% in comparison with the base material and the tensile strength dropped from only 397–358 MPa.
Solid-state welding of ultrafine grained copper rods
https://orcid.org/http://orcid.org/0000-0003-4238-376X
https://orcid.org/http://orcid.org/0000-0002-8341-0923
https://orcid.org/http://orcid.org/0000-0003-1527-5309
https://orcid.org/http://orcid.org/0000-0003-0002-8751
https://orcid.org/http://orcid.org/0000-0003-4250-8091
https://orcid.org/http://orcid.org/0000-0002-5399-4008
The article focuses on the Direct Drive Rotary Friction Welding of ultrafine-grained copper rods, which feature increased mechanical properties and good electrical properties, yet are limited in size. The use of UFG metals is often limited by the too small dimensions of semi-finished elements produced by SPD methods. Therefore, the production of finished machine parts from UFG metals is currently economically unjustified. Dismissal of dimensional limitations can be done by introducing joining to technological processes. The proposed joining method does not lead to a melting of the material in the joining zone or excessive degradation of the UFG microstructure. To obtain the best results, the research used the method of low-energy welding of two kinds of specimens: with a flat or a conical contact surface. In the article, the authors present, by means of metallographic microsections and microhardness measurements, the influence of rotational speed, welding pressure and conical shape contact surface on the quality of the obtained joints. The conducted research made it possible to obtain good quality joints whose microhardness is reduced only by about 10% in comparison with the base material and the tensile strength dropped from only 397–358 MPa.
Solid-state welding of ultrafine grained copper rods
https://orcid.org/http://orcid.org/0000-0003-4238-376X
https://orcid.org/http://orcid.org/0000-0002-8341-0923
https://orcid.org/http://orcid.org/0000-0003-1527-5309
https://orcid.org/http://orcid.org/0000-0003-0002-8751
https://orcid.org/http://orcid.org/0000-0003-4250-8091
https://orcid.org/http://orcid.org/0000-0002-5399-4008
The article focuses on the Direct Drive Rotary Friction Welding of ultrafine-grained copper rods, which feature increased mechanical properties and good electrical properties, yet are limited in size. The use of UFG metals is often limited by the too small dimensions of semi-finished elements produced by SPD methods. Therefore, the production of finished machine parts from UFG metals is currently economically unjustified. Dismissal of dimensional limitations can be done by introducing joining to technological processes. The proposed joining method does not lead to a melting of the material in the joining zone or excessive degradation of the UFG microstructure. To obtain the best results, the research used the method of low-energy welding of two kinds of specimens: with a flat or a conical contact surface. In the article, the authors present, by means of metallographic microsections and microhardness measurements, the influence of rotational speed, welding pressure and conical shape contact surface on the quality of the obtained joints. The conducted research made it possible to obtain good quality joints whose microhardness is reduced only by about 10% in comparison with the base material and the tensile strength dropped from only 397–358 MPa.
Solid-state welding of ultrafine grained copper rods
Archiv.Civ.Mech.Eng
Morawiński, Łukasz (author) / Jasiński, Cezary (author) / Ciemiorek, Marta (author) / Chmielewski, Tomasz (author) / Olejnik, Lech (author) / Lewandowska, Małgorzata (author)
2021-05-27
Article (Journal)
Electronic Resource
English
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