TY - JOUR
T1 - Dynamic recrystallization of Fe-Cr alloys by atmospheric-controlled induction-heating fine particle peening
AU - Kikuchi, Shoichi
AU - Tanaka, Ikko
AU - Takesue, Shogo
AU - Komotori, Jun
AU - Matsumoto, Keishi
N1 - Funding Information:
This work has been supported by the Grant-in-Aid for Scientific Research (B) No. 15H03894 of JSPS KAKENHI Grant from 2015. We are grateful for the support.
PY - 2018/6/25
Y1 - 2018/6/25
N2 - Atmospheric-controlled induction-heating fine particle peening (AIH-FPP) was conducted in a N2 atmosphere 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.
AB - Atmospheric-controlled induction-heating fine particle peening (AIH-FPP) was conducted in a N2 atmosphere 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.
KW - Dynamic recrystallization
KW - Grain refinement
KW - Peening
KW - Thermomechanical processing
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U2 - 10.1016/j.surfcoat.2018.03.030
DO - 10.1016/j.surfcoat.2018.03.030
M3 - Article
AN - SCOPUS:85044475273
SN - 0257-8972
VL - 344
SP - 410
EP - 417
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -