Effects of antiphase domain size and twin platelet width on the hardness of an ordered CuAu alloy

Takanobu Shiraishi, Michio Ohta, Masaharu Nakagawa

研究成果: ジャーナルへの寄稿会議記事査読

2 被引用数 (Scopus)

抄録

Effects of antiphase domain (APD) size and inter-twin spacing on the hardness of CuAu I-phase in the overaging stage were investigated by hardness testing, transmission electron microscopy, and X-ray powder diffraction. Overaging in CuAu I-phase upon progressive ordering at 300°C was found to proceed through three stages: stages I through III. In the stage I, twinning actively occurred, and most of the coherency strains were removed. Average inter-twin spacing slightly increased. These microstructural evolutions slightly decreased the hardness of the alloy. In the stage II, both APD size and average inter-twin spacing grew larger with time, leading to a continuous decrease in hardness. In the stage III, the APD size markedly grew larger, while the growth rate of average inter-twin spacing markedly slowed down. The continuous growth of APD size apparently-contributed to the further decrease in hardness. Although the crystal structure changes during the CuAu I ordering, a perfectly ordered alloy with no planar defects was suggested to be not so strong as the corresponding disordered alloy.

本文言語英語
ページ(範囲)117-122
ページ数6
ジャーナルMaterials Research Society Symposium - Proceedings
362
出版ステータス出版済み - 1995
イベントProceedings of the 1994 MRS Fall Meeting - Boston, MA, USA
継続期間: 11月 28 199411月 30 1994

!!!All Science Journal Classification (ASJC) codes

  • 材料科学一般
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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