Hot deformation behaviors of arc melted and heat treated NbSi based ultrahigh temperature alloys
作者： Ye Tang , Xiping Guo
DOI: 10.1016/J.IJRMHM.2019.105015
关键词:
摘要: Abstract The difference in hot deformation behaviors of arc melted (AM) and heat treated (HT) Nb Si based ultrahigh temperature alloys has been investigated at temperatures 1250 1410 °C respectively a strain rate 0.001 s−1. AM alloy exhibits higher peak stress than HT alloy. evolution deformed microstructure signified by the change silicide shape size, obviously restrained compared to one. During 1250 °C, continuous dynamic recrystallization (CDRX) Nbss promoted with alloy, while CDRX process Nb5Si3 shows little both alloys. At 1410 °C, is slower Smaller grains have formed after height reduction 60%, leading larger during flow softening former.
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