The effect of the gradient content of Co element on the solidification process of Cu-based alloy under deep under cooling conditions was explored.The non-equilibrium solidification structure of the under cooled alloy ...The effect of the gradient content of Co element on the solidification process of Cu-based alloy under deep under cooling conditions was explored.The non-equilibrium solidification structure of the under cooled alloy samples were analyzed.It is found that the rapidly solidified alloy has undergone twice grain refinement during the undercooling process.Characterization and significance of the maximum undercooling refinement structure of Cu60Ni35Co5 at T=253 K were analyzed.High-density defects were observed,such as dislocations,stacking faults networks,and twinning structures.The standard FCC diffraction pattern represents that it is still a single-phase structure.Based on the metallographic diagram,EBSD and TEM data analysis,it is illustrated that the occurrence of grain refinement under high undercooling is due to stress induced recrystallization.In addition,the laser cladding technology is used to coat Co-based alloy(Stellite12) coating on 304 stainless steel substrate;the microstructure of the coating cross-section was analyzed.It was found that the microstructure of the cross-section is presented as columnar crystals,planar crystals,and disordered growth direction,so that the coating has better hardness and wear resistance.By electrochemical corrosion of the substrate and coating,it can be seen that the Co and Cr elements present in the coating are more likely to form a dense passivation film,which improved the corrosion resistance of the coating.展开更多
如果将洞穴之喻(Allegory of the cave)①中的地穴视为电影院的化身,那么初期观众便是穴内的囚徒。他们以“影院”为尊,强调观影礼仪的神圣性,具有强烈的领地意识,将电影圈禁在牢不可破的幽穴深处。电影院观影很可能产生的是某种外在艺...如果将洞穴之喻(Allegory of the cave)①中的地穴视为电影院的化身,那么初期观众便是穴内的囚徒。他们以“影院”为尊,强调观影礼仪的神圣性,具有强烈的领地意识,将电影圈禁在牢不可破的幽穴深处。电影院观影很可能产生的是某种外在艺术装置的体验,而不是电影内在的体验。且随着放映技术的更新,电影院也不再是容纳电影的不二之选。展开更多
基金Funded by the Basic Research Projects in Shanxi Province(No.202103021224183)。
文摘The effect of the gradient content of Co element on the solidification process of Cu-based alloy under deep under cooling conditions was explored.The non-equilibrium solidification structure of the under cooled alloy samples were analyzed.It is found that the rapidly solidified alloy has undergone twice grain refinement during the undercooling process.Characterization and significance of the maximum undercooling refinement structure of Cu60Ni35Co5 at T=253 K were analyzed.High-density defects were observed,such as dislocations,stacking faults networks,and twinning structures.The standard FCC diffraction pattern represents that it is still a single-phase structure.Based on the metallographic diagram,EBSD and TEM data analysis,it is illustrated that the occurrence of grain refinement under high undercooling is due to stress induced recrystallization.In addition,the laser cladding technology is used to coat Co-based alloy(Stellite12) coating on 304 stainless steel substrate;the microstructure of the coating cross-section was analyzed.It was found that the microstructure of the cross-section is presented as columnar crystals,planar crystals,and disordered growth direction,so that the coating has better hardness and wear resistance.By electrochemical corrosion of the substrate and coating,it can be seen that the Co and Cr elements present in the coating are more likely to form a dense passivation film,which improved the corrosion resistance of the coating.
文摘如果将洞穴之喻(Allegory of the cave)①中的地穴视为电影院的化身,那么初期观众便是穴内的囚徒。他们以“影院”为尊,强调观影礼仪的神圣性,具有强烈的领地意识,将电影圈禁在牢不可破的幽穴深处。电影院观影很可能产生的是某种外在艺术装置的体验,而不是电影内在的体验。且随着放映技术的更新,电影院也不再是容纳电影的不二之选。
