Microstructure and microhardness of a novel TiZrAlV alloy by laser gas nitriding at different laser powers

  title={Microstructure and microhardness of a novel TiZrAlV alloy by laser gas nitriding at different laser powers},
  author={Zhi-hao Feng and Xingjun Sun and Peng Han and Hang Fu and Huicong Dong and Shun Guo and Ru Su and Jian-Hui Li},
  journal={Rare Metals},
Abstract The Ti–20Zr–6.5Al–4V (T20Z, wt%) alloy surface was treated by the process of laser surface nitriding. The evolution of microstructures and microhardness has been investigated by changing the laser power parameter from 120 to 240 W. All laser-treated T20Z samples show two regions with distinctly different microstructural features, as compared with the untreated substrate: dense TiN dendrites and (α + β) − Ti (remelting zone, RMZ), nanoscale α laths doped with part of β phase (heat… 
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