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Study of Processing Map and Effect of Hot Rolling on Mechanical Properties of Aluminum 5083 Alloy
Transactions of the Indian Institute of Metals ( IF 1.5 ) Pub Date : 2020-05-28 , DOI: 10.1007/s12666-020-02003-w
Amitava Rudra , Mohammad Ashiq , Jitendar Kumar Tiwari , Satyabrata Das , Rupa Dasgupta

Hot deformation behavior of aluminum 5083 alloy was studied based on the compression test done up to true strain 0.5 in the temperature range of 473–773 K and strain rate range of 0.01–10 s−1. The Arrhenius equations were used to evaluate the average activation energy for deformation. Processing map was developed to identify the optimum, safe and unsafe zones for processing based on the compression data. Electron backscattered diffraction (EBSD) and scanning electron microscopy images revealed the underlying micro-mechanisms at various deformation conditions. Varying fraction of dynamic recrystallization was found to coexist with dynamic recovery at high deformation temperature and different strain rates. Based on the safe deformation zone, hot rolling was attempted and up to 80% reduction of initial thickness was achieved. EBSD analysis showed that the percentage of dynamically recrystallized grains increased with increment in rolling reduction. Progressive and substantial increment in yield strength, ultimate tensile strength, ductility and bulk hardness was achieved with increment in rolling reductions.



中文翻译:

5083铝合金的加工工艺及热轧对力学性能的影响研究。

基于在473–773 K的温度范围内和0.01–10 s -1的应变率范围内,在达到真实应变0.5的压缩试验的基础上,研究了5083铝合金的热变形行为。。Arrhenius方程用于评估变形的平均激活能。开发了处理图,以根据压缩数据确定最佳,安全和不安全区域进行处理。电子背散射衍射(EBSD)和扫描电子显微镜图像揭示了在各种变形条件下的潜在微观机制。发现在高变形温度和不同应变速率下,动态再结晶的分数与动态恢复共存。在安全变形区的基础上,尝试进行热轧,并且初始厚度降低了80%。EBSD分析表明,动态再结晶晶粒的百分比随着轧制压下量的增加而增加。屈服强度,极限抗拉强度逐步提高,

更新日期:2020-05-28
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