添加高频和ER对AL-MG-SC-ZR系统合金机械性能和微观结构的影响

E. Aryshenskii, V. Aryshenskii, A. Ragazin, D. Y. Rasposienko, F. V. Grechnikov, V. V. Makarov, S. Konovalov
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引用次数: 0

摘要

该研究探讨了 1580 和 1590 合金冷轧带退火工艺对合金晶粒结构和机械性能的影响。1590 合金与 1580 合金的不同之处在于添加了铪和铒。这种合金的样品是在钢模中浇铸而成的。然后在 440°С 温度下均质 4 小时。然后在 440°С 温度下对样品进行热轧,再冷轧至 2 毫米,累计减薄百分比为 66%。冷轧后的带材在 330 至 440°С 温度范围内进行退火,并浸泡 1 小时。使用透射显微镜检查了均质状态下 Al3Sc 强化纳米粒子的尺寸和形态。在冷轧和退火条件下,确定了机械性能和晶粒结构。与 1580 合金相比,1590 合金在均匀化退火过程中形成了更细的强化纳米颗粒。这种微观结构特征可解释为铒和铪的存在,铒可促进形成额外的 Al3Sc 型纳米粒子核,而铪则可阻止其进一步生长。两种合金在冷轧和最终退火后都出现了非再结晶结构。无论退火温度如何,1590 合金都具有更好的机械性能,这是因为强化纳米粒子的比例更大、尺寸更小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of HF and ER additions on the mechanical properties and microstructure of AL-MG-SC-ZR system alloys
The study addresses the effect of 1580 and 1590 alloys cold rolled strip annealing practices on the alloys’ grain structure and mechanical properties. The 1590 alloy differs from the 1580 alloy by hafnium and erbium additions. Samples of such alloys were produced by casting into a steel mold. After that they were homogenized during 4 h at 440°С. Then the samples were hot rolled at 440°С, with further cold rolling to 2 mm, with the cumulative percentage reduction equal to 66%. The cold rolled strip was annealed at the temperature ranging from 330 to 440°С with 1 h soaking. The sizes and morphology of Al3Sc strengthening nanoparticles were examined in homogenized condition using transmission microscopy. The mechanical properties and grain structure were defined in cold rolled and annealed conditions. During homogenizing annealing in the 1590 alloy finer strengthening nanoparticles are formed compared to the 1580 alloy. Such features of the microstructure can be explained by the presence of erbium, promoting formation of additional Al3Sc-type nanoparticles nuclei, and hafnium, preventing their further growth. Non-recrystallized structure was identified in both alloys after cold rolling and final annealing. The 1590 alloy has better mechanical properties, regardless of the annealing temperature, which is explained by a larger portion and smaller size of strengthening nanoparticles.
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