Structural mechanisms of the mechanical degradation of Ti-Al-V alloys: in-situ study during annealing

Berberich, Florian; Matz, Wolfgang; Richter, Edgar; Schell, Norbert; Kreißig, Ulrich; Möller, Wolfhard

Structural mechanisms of the mechanical degradation of Ti-Al-V alloys: in-situ study during annealing

Berberich, F.; Matz, W.; Richter, E.; Schell, N.; Kreißig, U.; Möller, W.

Aim of the work is to investigate the structural mechanisms of the enhanced hardness of the technical alloy Ti-6Al-4V due to N+ implantation and its degeneration. Ti-6Al-4V samples were implanted with doses (1 - 6) x 1017 N+/cm2 at 80 keV. The structural implications of the loss of hardness during annealing were studied by in-situ XRD-experiments with synchrotron radiation. Additional sample characterisation was performed by SEM, ERDA and Vickers hardness. The hardness reduction due to annealing is caused by phase transformation from TIN to Ti2N as well as by rearrangements in the alpha-Ti and beta-Ti phase of the alloy.

Keywords: Ti-6Al-4V; ion implantation; XRD; hardness

Poster
11th International Conference on Surface Modification of Metals by Ion Beams, Beijing, China, September 19-24, 1999.
Surface and Coatings Technology 128-129 (2000) 450-454
Poster
Symposium 25 Jahre Strukturforschung am Lehrstuhl Prof. J. Peisl, LMU München, 12.-13.Nov. 1999
Contribution to proceedings
11th International Conference on Surface Modification of Metals by Ion Beams, Beijing, China, September 19-24, 1999.

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