• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Effects of cryogenic temperature and pre-stretching on mechanical properties and deformation characteristics of a peak-aged AA6082 extrusion
【24h】

Effects of cryogenic temperature and pre-stretching on mechanical properties and deformation characteristics of a peak-aged AA6082 extrusion

机译：低温和预拉伸对AA6082峰值时效挤出力学性能和变形特性的影响

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

Plastic deformation studies of a peak-aged AA6082 alloy by means of tensile tests at 77 K and 295 K, and related microstructure characteristics obtained by Scanning Electron Microscopy (SEM), Electron Backscatter Diffraction (EBSD), Transmission Electron Microscopy (TEM) and Atom Force Microscopy (AFM), revealed new results. A simultaneous improvement in ductility and strength occurred at 77 K, but not at 295 K. A higher work hardening accompanied by a more homogeneous slip mode explained the improved properties at 77 K. Pre-stretching at these two temperatures and subsequent tensile testing at room temperature revealed a marked yield point. However, pre-stretching at 77 K exhibited a slightly higher room temperature yield strength and ductility than the condition pre-stretched at 295 K. Annealing after pre-stretching improved ductility and reduced the magnitude of the yield point. Pre-stretching at 77 K and subsequent annealing introduced somewhat higher strength and ductility as compared to the counterpart pre-stretched at 295 K. The observed mechanical behaviour and associated phenomena were directly linked to microstructure characteristics such as deformation substructure history, slip localization, dislocation density and the precipitate β'/β" ratio.
机译：峰值时效AA6082合金在77 K和295 K下的拉伸试验的塑性变形研究，以及通过扫描电子显微镜（SEM），电子背散射衍射（EBSD），透射电子显微镜（TEM）和原子分析获得的相关显微组织特征力显微镜（AFM）揭示了新结果。在77 K时出现延展性和强度的同时改善，但在295 K时没有出现。较高的加工硬化率和更均匀的滑模说明了77 K时性能的改善。在这两个温度下进行预拉伸，然后在室温下进行拉伸试验温度显示出明显的屈服点。但是，在77 K下进行预拉伸比在295 K下进行预拉伸时，室温屈服强度和延展性略高。在预拉伸后进行退火可以改善延展性并降低屈服点的大小。与在295 K时进行预拉伸相比，在77 K时进行预拉伸和随后的退火处理具有更高的强度和延展性。密度和沉淀物的β'/β“比。

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