Effect of water flow rate, casting speed, alloying elements and pull distance on tensile strength, elongation percentage and microstructure of continuous cast copper alloys

Abstract

Effect of water flow rate, casting speed, alloying elements and pull distance on tensile strength, elongation percentage and microstructure of continuous cast copper alloys Bagherian, Ehsaan-Reza; Fan, Yongchang; Cooper, Mervyn; Frame, Brian; Abdolvand, Amin General rights Copyright and moral rights for the publications made accessible in Discovery Research Portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from Discovery Research Portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain.• You may freely distribute the URL identifying the publication in the public portal. Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. AbstractMost parameters that control the solidification of castings, and consequently, microstructure and mechanical properties, are: chemical composition, liquid metal treatment, cooling rate and temperature gradient. In this work, characterization of the influence of water flow rate, casting speed, alloying element and pull distance on tensile strength, elongation percentage and microstructure of continuous cast copper alloys has been carried out. A significant difference based on tensile strength, elongation percentage and grain structure has been investigated and it was also found that these parameters could improve the physical and mechanical properties of samples. As a particular example, water flow rate could improve the elongation of samples from 10% to 25%.

Influence of Alloying Element and Ageing on Microstructure and Dry Sliding Wear Behaviour of Cu-Zn-xNi Alloy

“…The presence of more Ni allows for finer dendritic grains and a decrease in secondary dendrite arm spacing. This decrease in secondary dendrite arm spacing was also observed in (Bagherian et al, 2016), where authors discovered that as Zr content increased from 2.6 to 6.8 percent, secondary dendrite arm spacing decreased from 4.65 to 1.54 m. As the Zr particle content increased, so did the number of nucleation sites for finer grains, resulting in a greater number of fine size dendritic grains. Furthermore, when compared to the cast alloy, the aged alloy had a slightly higher number of fine size dendritic grains, as shown in Figure 1 (d).…”

“…This is the primary reason for aged alloy's refined microstructure when compared to cast alloy. Bagherian et al (2016) investigated the microstructure of continuous cast Cu-Sn alloys with and without Zr as a grain refiner. The space between the secondary dendrite arms was found to be reduced by the addition of Zr, and precipitation resulted in significant refinement of dendrite grains.…”

Optimising Computational Fluid Dynamic Conditions for Simulating Copper Vertical Casting

“…Overlaid are SF contours for settings Amush 10 6 kg/m 3 s and mesh size 1×10 -4 m, where below the line represents a liquid region and above solidified grains. The behaviour observed is typical for this configuration, with solidification occurring first at the edges of the die (left and right hand sides of image) as small equiaxed grains (the chill zone); longer columnar grains within the middle section; and smaller grains again near to the rod centre [7]. The growth direction of the grains is perpendicular to the position of the SF and this direction was highlighted on plot by white arrows.…”

“…The current manufacturing capabilities for 8 mm diameter VUCC OFCu are approximately on average 90 kg/hr or 3.5 m/min, with a pushback setting applied [7]. In this study, to identify the best simulation settings and limitations of a CFD model of this casting setting, fluid and solidification distribution within the casting die was analysed for the different simulation parameters and contrasted against known casting behaviours and an OFCu VUCC 8 mm rod.…”

Prediction of Periodic Centerline Porosity and Pulse Marks by CFD and Experimentation for Continuously Cast Copper

“…[2][3][4][5][6] For CC, the typical motions comprise of a continuous withdrawal (out of the casting setup), a pause (dwell), or pushback (into the crucible/ melt) coinciding with a remelt. [3,[7][8][9] CC may include a variety or combination of these motions, which are repetitive and can be referred to as a pulse sequence. [1] External defects, such as pulse marks, appear as notches on the outer periphery of a directionally cast billet/wire and are witnessed in most CC alloy systems.…”