Structural evolution and stability of mechanically alloyed Fe-Ni nanocrystalline^①

来源期刊：中南大学学报(英文版)2005年第4期

论文作者：陈资 刘奇正 孟庆平 戎咏华

文章页码：389 - 392

Key words：mechanical alloying; Fe-Ni nanocrystalline; structural evolution; phase stability; martensitic transfor-mation

Abstract: The structural evolution and stability of Fe_100-xNi_x(x=10, 20, 35, 50) alloys prepared by mechanical alloying were investigated through X-ray diffraction analysis and transmission electron microscopy. The intrinsic conditions of preparation determining phase stability in nanocrystalline were clarified. After being milled for 120 h,the powders of Fe₉₀Ni₁₀and Fe₈₀Ni₂₀ consist of a single α(bcc) phase, Fe₃₀Ni₃₀ powders are a single γ(fcc), and for Fe65Ni35 powders there is co-existence ofαandγphases. The as-milled Fe₈₀Ni₂₀ powders annealed at 680℃exhibits the stability of high-temperatureγphase at room temperature, which is consistent with the theoretical prediction.