Various effects of laser treatments on oxide dispersion strengthened materials produced by a non-meltingroute, mechanical alloying, have been investigated. The alloys studied are a nickel- base alloyNi- 19.51%Cr- 6.0%...Various effects of laser treatments on oxide dispersion strengthened materials produced by a non-meltingroute, mechanical alloying, have been investigated. The alloys studied are a nickel- base alloyNi- 19.51%Cr- 6.0%Al- 3.41% W- 1.19%Fe- 1.02%Y_2O_3 and an iron- base alloy Fe- 20.0% Cr- 4.5%Al-0.5% Ti-0.5% Y_2O_3(wt%). Aspects examined include oxide distribution around molten zone, alloy reaction tolaser heat shock, solidification microstructures, laser simulation of zone annealing, and the response topost-heat treatment after laser melting of a local region. Optical metallography. scanning electron microscopy,hardness measurements, and thermodynamical calculation methods have been employed.展开更多
文摘Various effects of laser treatments on oxide dispersion strengthened materials produced by a non-meltingroute, mechanical alloying, have been investigated. The alloys studied are a nickel- base alloyNi- 19.51%Cr- 6.0%Al- 3.41% W- 1.19%Fe- 1.02%Y_2O_3 and an iron- base alloy Fe- 20.0% Cr- 4.5%Al-0.5% Ti-0.5% Y_2O_3(wt%). Aspects examined include oxide distribution around molten zone, alloy reaction tolaser heat shock, solidification microstructures, laser simulation of zone annealing, and the response topost-heat treatment after laser melting of a local region. Optical metallography. scanning electron microscopy,hardness measurements, and thermodynamical calculation methods have been employed.
