• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Microstructure study of cold rolled Al_(0.32)CoCrFeMnNi high-entropy alloy: Interactions between recrystallization and precipitation
【24h】

Microstructure study of cold rolled Al_(0.32)CoCrFeMnNi high-entropy alloy: Interactions between recrystallization and precipitation

机译：冷轧AL_（0.32）COCRFEMNNI高熵合金的微观结构研究：重结晶与降水之间的相互作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The equimolar CoCrFeMnNi alloy is widely studied for its excellent mechanical properties at cryogenic temperatures. Interestingly, it presents a unique combination of strength and ductility mainly due to the occurrence of twinning at these low temperatures. Motivated by the desire to improve its room temperature strength, this study focuses on the optimization of the microstructure through alloying and thermomechanical treatments. More specifically, the effect of alloying with aluminium is studied with the aim of triggering precipitation strengthening. The composition A10.32CoCrFeMnNi is chosen on the basis of thermodynamic data and submitted to various processing routes including cold rolling and annealing steps. The annealing temperature is shown to be the key parameter determining the governing microstructure transformations. At annealing temperatures below 900 °C, precipitation is the main phenomenon taking place. Above 900 °C, recrystallization is governing the evolution of the microstructure. At 900 °C, both mechanisms occur simultaneously. Recrystallization occurs first on grain boundaries and shear bands while precipitation is activated both in recrystallized and unrecrystallized regions with distinctive morphologies. It is shown to impede further recrystallization. Thermodynamic calculations are performed to explain the precipitation sequence observed in both regions. By increasing the rolling level from 60% to 80%, recrystallization kinetics is accelerated and complete recrystallization reached. A wide range of microstructure is achieved through the variety of thermomechanical treatments explored in this study. These various microstructures in turn translate into a wide range of hardness levels and tensile properties.
机译：Equimolar CocrFemnni合金广泛研究其在低温温度下的优异机械性能。有趣的是，它提出了强度和延展性的独特组合，主要是由于这些低温下的孪生发生。这项研究旨在提高其室温强度的愿望，专注于通过合金化和热机械处理优化微观结构。更具体地，利用铝合金的效果，目的是引发沉淀强化。在热力学数据的基础上选择组成A10.32COCRFEMNI，并提交给各种加工路线，包括冷轧和退火步骤。退火温度被示出为确定控制微观结构变换的关键参数。在退火温度低于900°C后，降水是主要现象。高于900℃，重结晶是控制微观结构的演变。在900°C时，两种机构同时发生。重结晶首先发生在晶界和剪切带上，而沉淀在具有独特形态的再结晶和未结晶的区域中被激活。显示出妨碍进一步重结晶。进行热力学计算以解释在两个区域中观察到的沉淀序列。通过将轧制水平从60％增加至80％，加速重结晶动力学并达到全重结晶。通过本研究探索的各种热机械处理实现了各种微观结构。这些各种微观结构又转化为各种硬度水平和拉伸性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号