Dynamic recrystallization of Fe-Cr alloys by atmospheric-controlled induction-heating fine particle peening
Dynamic recrystallization of Fe-Cr alloys by atmospheric-controlled induction-heating fine particle peening
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DOI：
10.1016/j.surfcoat.2018.03.030
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发表时间：
2018-06
影响因子：
5.4
通讯作者：
S. Kikuchi;Ikko Tanaka;Shogo Takesue;J. Komotori;Keishi Matsumoto
中科院分区：
文献类型：
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作者：
S. Kikuchi;Ikko Tanaka;Shogo Takesue;J. Komotori;Keishi Matsumoto
在n2气氛中进行气氛控制感应加热细颗粒强化（AIH-FPP），在Fe-Cr合金表面形成超细晶粒。采用光学显微镜、扫描电镜（SEM）、电子背散射衍射（EBSD）和透射电镜（TEM）对973 K和1073 K下AIH-FPP处理的Fe-2%Cr合金和Fe-10%Cr合金的表面组织进行了表征。由于AIH-FPP在动态再结晶过程中以高速率和高温诱导应变，因此可以作为在Fe-Cr合金表面形成超细晶粒的热机械工艺。随着AIH-FPP处理时间的延长，Fe-Cr合金的晶粒尺寸有减小的趋势。这是由于在动态再结晶过程中，随着AIH-FPP处理时间的延长，AIH-FPP诱导的应变增加。因此，随着处理时间的增加，aih - fpp诱导的由细晶粒组成的分层结构变得更加明显。此外，AIH-FPP处理温度与Fe-Cr合金的Cr浓度有关。
Atmospheric-controlled induction-heating fine particle peening (AIH-FPP) was conducted in a N2atmosphere to form ultrafine grains on the surface of Fe-Cr alloys. The surface microstructure of Fe-2%Cr alloy and Fe-10%Cr alloy treated with AIH-FPP at 973 K and 1073 K was characterized using optical microscopy, scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM). AIH-FPP can be used as a thermomechanical process to form ultrafine grains on the surface of Fe-Cr alloys because strain is induced by AIH-FPP at a high rate and high temperature during dynamic recrystallization. In particular, the grain size of Fe-Cr alloys tends to decrease with increasing AIH-FPP treatment time. This is attributed to the increase in the strain induced by AIH-FPP with increasing AIH-FPP treatment time during dynamic recrystallization. Thus, the AIH-FPP-induced stratification structure composed of fine grains becomes more pronounced with increasing treatment time. Furthermore, the AIH-FPP treatment temperature at which fine grains are formed depends on the Cr concentration of the Fe-Cr alloys.