Strength properties and structure of CuCrZr alloy subjected to low-temperature KOBO extrusion and heat treatment

• Published in: International journal of advanced manufacturing technology Vol. 105; no. 12; pp. 5023 - 5044
• Main Authors: Ostachowski, Paweł, Bochniak, Włodzimierz, Łagoda, Marek, Ziółkiewicz, Stanisław
• Format: Journal Article
• Language: English
• Published: London Springer London 01.12.2019; Springer Nature B.V
• Subjects: Acceleration; CAE) and Design; Computer-Aided Engineering (CAD; Copper base alloys; Electrical properties; Engineering; Extrusion; Heat treatment; Industrial and Production Engineering; Low temperature; Mechanical Engineering; Media Management; Original Article; Point defects; Precipitates; Solid solutions; Thermal stability; Thermodynamic equilibrium; Cu1Cr0.1Zr alloy; Mechanical properties; Heat treatment; Electrical conductivity; KOBO extrusion
• ISSN: 0268-3768; 1433-3015
• DOI: 10.1007/s00170-019-04602-4

KOBO extrusion of metals and alloys strongly activates the point defect generation processes, as a result of which they reach a concentration exceeding the equilibrium level by many orders of magnitude. This leads to significant acceleration of diffusion phenomena which in heat-treatable alloys may cause disturbance of the thermodynamic equilibrium between the solid solution decomposition and dissolution of precipitates. In this work, measurements of mechanical and electrical properties and structural observations Cu1Cr0.1Zr alloy subjected to low-temperature KOBO extrusion at different stages of multi-variant heat treatment were conducted. In addition, the geometry of the extruded alloy’s flow zone was analyzed and the obtained results made it possible to assess the effectiveness of experimental procedures, including product formation with high extrusion ratio λ, aimed at achieving of high and thermally stable functional properties of the material.