...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >A new strategy to simultaneous increase in the strength and ductility of AA2024 alloy via accumulative roll bonding (ARB)
【24h】

A new strategy to simultaneous increase in the strength and ductility of AA2024 alloy via accumulative roll bonding (ARB)

机译：通过累积辊压粘结（ARB）同时提高AA2024合金强度和延展性的新策略

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

Nano/ultrafine grained (NG/UFG) AA2024 alloy produced by accumulative roll bonding (ARB) showed high strength (420 MPa) and very limited elongation (about 1.3%). A new strategy via ARB was developed to improve elongation (about 10%) of AA2024 alloy with a relatively high strength (365 MPa). The present strategy produced a bimodal structure consisting of coarse and ultrafine elongated grains in comparison to the UFG alloy. Electron backscattered diffraction (EBSD) revealed that after 4 ARB cycles, the fraction of high angle grain boundaries and mean misorientation angle of the boundaries in the bimodal grain structure were 61% and 27.34°, respectively, in comparison to that of annealed (54% and 24.96°) and UFG (79% and 34.27°) alloy. The crystallographic texture results indicated that, unlike the annealed AA2024 alloy, the intensity of Brass {011} 〈 211〉 and S {123} 〈 634 〉 components remarkably increased in the UFG and bimodal alloy. Scanning electron microscopy (SEM) observations demonstrated that failure mode in bimodal alloy was ductile fracture with a combination of deep and shallow dimples.
机译：通过累积辊压结合（ARB）生产的纳米/超细晶粒（NG / UFG）AA2024合金显示出高强度（420 MPa）和非常有限的延伸率（约1.3％）。开发了一种通过ARB的新策略，以相对较高的强度（365 MPa）提高AA2024合金的延伸率（约10％）。与UFG合金相比，本发明的策略产生了由粗大晶粒和超细长晶粒组成的双峰结构。电子背散射衍射（EBSD）显示，经过4次ARB循环后，双峰晶粒结构中高角度晶界的比例和晶界的平均取向差角与退火（54％）相比分别为61％和27.34°和24.96°）和UFG（79％和34.27°）合金。晶体织构结果表明，与退火的AA2024合金不同，UFG和双峰合金中的黄铜{011} ＜211＞和S 123 ＜634＞的强度显着增加。扫描电子显微镜（SEM）观察结果表明，双峰合金的破坏模式为韧性断裂，并伴有深浅凹痕。

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