A three-dimensional finite element modelling of the laser surface nitriding of Ti-6A1-4V alloy is presented. Design capabilities of ANSYS parametric design language (APDL) were employed for this purpose. The model calculates transient temperature profiles, the dimensions of fusion zone and residual stresses in the laser surface nitrided Ti-6A1-4V alloy. Model simulations are compared with experimental results, acquired on-line using an ultra-high-speed shutter camera which is able to acquire well-contrasted images of the molten pool, and off-line using metallographical and X-ray diffraction analyses which show very good agreement. The results are further discussed to provide directions for reducing the residual stresses, as well as for feedback and process control.
MortenP. H.BellT.WeisheitA.KrollJ.MordikeB.SagoK. In Surface Modification Technologies V (Ed. SundarshanT. S.BrazaJ. F.), 1992, pp. 593–609 (The Institute of Materials, London).
11.
MridhaS.BakerT. N.Mater. Sci. and Engng, 1994, A188, 229–236.
GoldakJ.McDillM.OddyA.HouseR.ChiX.BibbyM. In Advances in Welding Science and Technology, 1986, pp. 15–20 (ASM International, Metals Park, Ohio).
17.
WoodR. A.FavorR. J. In Titanium Alloys Handbook, 1972, pp. 1–26 (Air Force Materials Laboratory, Wright-Patterson Air Force Base, Department of Defense Information Analysis Center, Ohio).
18.
RadajD. In Heat Effects of Welding; Temperature Field, Residual Stress, Distortion, 1992, pp. 1–156 (Springer-Verlag, Berlin and New York).
19.
MakuthD. J.MonroeR. E.FavorR. J.MoonD. P. In Titanium Base Alloys 6 Al-4V, 1967, A-18–A-19 (Defense Metals Information Center, Battelle Memorial Institute, Columbus, Ohio).
20.
NambaY. In Laser Forming in Space (Ed. WangC. P.), 1986, pp. 403–407 (Osaka, Japan).
21.
LiW.GeigerM.VollertsenF.Chin. J. Lasers, 1998, 25(9), 859–864.
22.
BrownS.SongH.J. Engng for Industry, 1992, 114, 441–451.
23.
ANSYS Theory Manual, Release 5.3, June 1996 (ANSYS Inc., USA).
24.
FrewinM. R.ScottD. A.Weld. J., 1999, 78, 15–22.
25.
HuD.LabudovicM.KovacevicR. In Proceedings of the 9th International Conference on Computer Technology in Welding (Ed. SiewertT.PollockC.), NIST Special Publication 949, May 2000, pp. 417–424.
26.
JamesM. R.CohenJ. B. In Experimental Methods in Materials Science, 1958, Vol. 1, pp. 30–126 (Academic Press, New York).
27.
MridhaS.BakerT. N.Mater. Sci. and Engng, 1994, A188, 229–239.
28.
KloostermanA. B.De HossonJ. Th. M. In International Conference on Computer Methods and Experimental Measurements for Surface Treatment Effects, Milan, Italy, 1995, pp. 247–254.
