预变形和双级时效对<strong>Fe-30Mn-11Al-1.2C</strong>奥氏体低密度钢显微组织和力学性能的影响

预变形和双级时效对Fe-30Mn-11Al-1.2C奥氏体低密度钢显微组织和力学性能的影响

任平, 陈兴品, 王存宇, 俞峰, 曹文全

Effects of Pre-Strain and Two-Step Aging on Microstructure and Mechanical Properties of Fe-30Mn-11Al-1.2C Austenitic Low-Density Steel

REN Ping, CHEN Xingpin, WANG Cunyu, YU Feng, CAO Wenquan

图7 CR + A1 + A2态Fe-30Mn-11Al-1.2C钢样品的TEM分析

Fig.7 TEM analyses of CR + A1 + A2 Fe-30Mn-11Al-1.2C steel sample
(a) bright field TEM image of intergranular precipitates
(b) SAED pattern of β-Mn and DO₃-ordered α phases in Fig.7a along [

1 \bar{3} 1

]

_{D O_{3}}

and [

01 \bar{1}

] _β_-Mn zone axes
(c) dark field TEM image and SAED pattern (inset) along [001] _γ zone axis of κ′-carbide
(d) bright field TEM image of intragranular DO₃-ordered α precipitates showed by arrows
(e) magnifying image of intragranular DO₃-ordered α precipitates
(f) SAED pattern of DO₃-ordered α precipitates along [

\bar{1} \bar{1} 0

]

_{D O_{3}}

zone axis