Study on preparation of TiAl-based microlaminated sheet
The microstructure and properties of TiAl-based microlaminated sheet fabricated by EB-PVD are discussed by means of scan electron microscopy (SEM) ,transmission electron microscopy (TEM) and tensile test at room temperature and high temperature. The results indicate that the microstructure of TiAl-based alloys sheet is non-flat columnar crystal and the substructure is crescent pattern. The microstructure of the Nb layers in TiAl/Nb microlaminated sheet is bulky equiaxed crystal. The NiCoCrAl layers in TiAl/NiCoCrAl micro laminated sheet are mainly composed of ?-Ni phase with the microstructure of flat columnar crystal. The mechanical properties of TiAl-based microlaminated sheet are much better than that of the TiAl-based alloys sheet at room and high temperature.Especially at about 750℃ ,the toughening effects of TiAl/NiCoCrAl microlaminated sheet is the best,and the elongation percentage is as high as 72.2%. TiAl/ Nb microlaminated sheet has the best combination properties at high temperature,and the tensile strength at high temperature is as high as 443.1 MPa almost equivalent with that at room temperature.
TiAl-based alloys microlaminated sheet preparation electron beam-physical vapor deposition microstructure and properties
ZHANG Deming REN Xianjing YU Yueguang HAN Yuanyuan
Beijing General Research Institute of Mining and Metallurgy,Beijing 100044,China General Research Institute for Non-Ferrous Metals,Beijing 100088,China
国际会议
The 10th China-Russia System on Advanced Materials and Technologies(第十届中俄新材料新工艺研讨会)
浙江嘉兴
英文
289-292
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）