Dependence of microstructure evolution of novel CoreFlow™ aluminium alloy wire on wire diameter
Dependence of microstructure evolution of novel CoreFlow™ aluminium alloy wire on wire diameter
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DOI：
10.1016/j.jmrt.2023.12.177
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发表时间：
2023-12
期刊：
影响因子：
--
通讯作者：
Liang Yuan;Xun Zeng;Xingjian Zhao;Yanheng Xie;Joao Gandra;Dikai Guan
中科院分区：
文献类型：
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作者：
Liang Yuan;Xun Zeng;Xingjian Zhao;Yanheng Xie;Joao Gandra;Dikai Guan
线材直径是用于定制合金线材微观结构的关键参数之一，该合金线材采用新型室温 (RT) 一步式 CoreFlow™ 工艺制备。然而，CoreFlowed 线材在不同温度下的微观结构演变仍不清楚。在 CoreFlowed 线材的未来设计中应考虑微观结构特性对 Dr 的依赖性。在本研究中，系统研究了四种直径（Dr= 1、2、3 和 4 mm）的 CoreFlowed 6082 铝 (Al) 线的微观结构演变。经过 CoreFlow™ 处理后，所有 CoreFlowed 线材的平均晶粒尺寸均小于 12 μm，而原始铝片的粗晶粒尺寸为 2000 μm。随着Dr的增加，晶粒的细化程度降低。特别是，CoreFlowed 线材中引入了梯度结构，其特征是晶粒尺寸沿径向直径从边缘到中心增加。 CoreFlow™ 过程中应变和热量之间相互作用的差异导致了晶粒尺寸的梯度。随着Dr的增加，边缘和中心的晶粒尺寸同时增大，但它们之间的平均晶粒尺寸差异减小，这与热和应变随Dr的非线性变化有关。此外，晶粒尺寸的梯度分布导致特定微观织构成分的梯度分布。 CoreFlowed线材的织构成分随Dr变化较大，但随着Dr的增加，其变化呈现从再结晶织构到变形织构的趋势。
The wire diameterDris one of the key parameters used to tailor the microstructure of alloy wires prepared using a novel room-temperature (RT), one-step CoreFlow™ process. However, the microstructural evolution of CoreFlowed wires at varyingDrremains unclear. The dependence of microstructure characteristics on theDrshould be considered in the future design of CoreFlowed wires. In this study, the microstructure evolution of CoreFlowed 6082 aluminium (Al) wires with four diameters (Dr= 1, 2, 3, and 4 mm) was systematically investigated. After the CoreFlow™, the average grain sizes of all CoreFlowed wires were less than 12 μm compared with the original Al sheet with a coarse grain of 2000 μm. As theDrincreases, the refinement degree of the grain decreases. Particularly, a gradient structure, characterised by grain size increasing from the edge to its centre along the radial diameter, is introduced into CoreFlowed wires. The difference in interaction between strain and heat during CoreFlow™ is responsible for the gradient in grain size. As theDrincreases, the grain size at the edge and its centre increases simultaneously, but the difference in average grain size between them decreases, which is related to the nonlinear change of heat and strain with theDr. Moreover, the gradient distribution of grain size causes the gradient distribution of specific micro-texture components. The texture components in CoreFlowed wires show a great change withDr, but their variations show a trend from recrystallization texture to deformation texture with an increase inDr.