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Influences of hydrogenation on microstructure and microhardness of Ti6Al4V alloy

Conference Paper


Abstract


  • The microstructures of Ti6A14V alloy after hydrogenation have been investigated and analysed by optical microscopy (OM), X-ray diffraction (XRD) and transmission electron microscopy (TEM), and the influence of hydrogenation on the hardness of a and ß phases has been analysed by microhardness testing. The microstructure observation revealed that 5 hydride (fee structure) precipitated in the specimens with 0.278 wt.% and 0.514 wt.% hydrogen, and a lot of dislocations and twins have been found simultaneously. The diffraction peaks moved to the lower angles because of the lattice expansion of ß phase with the solution of hydrogen atoms. The result of microhardness testing shows that the hardness of a and ß phases increases synchronously with increasing of hydrogen and the increment of ß is larger than that of a. It is considered that the formation of S hydrides, lattice defects and alloying element diffusion are the major factors leading to the microhardness change.

Publication Date


  • 2007

Citation


  • Zhao, J. W., Ding, H., Zhao, W. J., Tian, X. F., Xiao, H. W., & Hou, H. L. (2007). Influences of hydrogenation on microstructure and microhardness of Ti6Al4V alloy. In Materials Science Forum Vol. 561-565 (pp. 295-298). doi:10.4028/0-87849-462-6.295

Scopus Eid


  • 2-s2.0-38349183879

Web Of Science Accession Number


Start Page


  • 295

End Page


  • 298

Volume


  • 561-565

Issue


  • PART 1

Abstract


  • The microstructures of Ti6A14V alloy after hydrogenation have been investigated and analysed by optical microscopy (OM), X-ray diffraction (XRD) and transmission electron microscopy (TEM), and the influence of hydrogenation on the hardness of a and ß phases has been analysed by microhardness testing. The microstructure observation revealed that 5 hydride (fee structure) precipitated in the specimens with 0.278 wt.% and 0.514 wt.% hydrogen, and a lot of dislocations and twins have been found simultaneously. The diffraction peaks moved to the lower angles because of the lattice expansion of ß phase with the solution of hydrogen atoms. The result of microhardness testing shows that the hardness of a and ß phases increases synchronously with increasing of hydrogen and the increment of ß is larger than that of a. It is considered that the formation of S hydrides, lattice defects and alloying element diffusion are the major factors leading to the microhardness change.

Publication Date


  • 2007

Citation


  • Zhao, J. W., Ding, H., Zhao, W. J., Tian, X. F., Xiao, H. W., & Hou, H. L. (2007). Influences of hydrogenation on microstructure and microhardness of Ti6Al4V alloy. In Materials Science Forum Vol. 561-565 (pp. 295-298). doi:10.4028/0-87849-462-6.295

Scopus Eid


  • 2-s2.0-38349183879

Web Of Science Accession Number


Start Page


  • 295

End Page


  • 298

Volume


  • 561-565

Issue


  • PART 1