Plastic inhomogeneity and easy glide of aluminum and Al-Al3Ni eutectic alloy with [111] fiber texture

J. Y. Uan, T. S. Lui, L. H. Chen

研究成果: Article同行評審

11 引文 斯高帕斯(Scopus)

摘要

An aluminum of commercial purity and a directionally solidified Al-Al3Ni eutectic alloy were extruded to obtain [111] fiber texture. Tensile testings were then performed at room temperature and 500°C with the tensile direction parallel to the fiber axis. Similar to stage I tensile deformation of single crystals, the room temperature flow curve of the pure aluminum and that of the Al-Al3Ni alloy with pure intergranular particles reveal plateau-like flow behavior at the initial stage of yielding. For the latter deformed at 500°C, the flow curve shows superior elongation with ideal plastic behavior following the initial work-hardening stage. The above results are associated with plastic inhomogeneity with which primary slip occurs in limited subgrains and dislocation activities in most subgrains are extremely low or absent. This plastic inhomogeneity can be rationalized by comparing the Taylor factors of primary slip and multiple slip for the subgrains of different misorientations. Also, as discussed in this paper, the influence of the Portevin-LeChatelier effect on the above results can be neglected if it exists.

原文English
頁(從 - 到)623-634
頁數12
期刊Acta Materialia
45
發行號2
DOIs
出版狀態Published - 1997 七月 1

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 陶瓷和複合材料
  • 聚合物和塑料
  • 金屬和合金

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