The effects of thermal history on microstructures of direct-laser-fabricated Ti-6Al-4V alloy

L. Qian, J. Mei, Xinhua Wu

Research output: Contribution to conferencePaper


A 2D axis-symmetric-transient finite element model for direct laser fabrication has been developed for predicting the temperature history of Direct Laser Fabricated (DLFed) Ti-6Al-4V thin wall samples. The effect of location, laser scanning speed and laser power on the variation of temperature with time have been modelled and compared with temperatures measured using thermocouples during laser fabrication. The microstructures of the laser fabricated Ti-6Al-4V have also been assessed systematically under a range of process conditions. The thermal history of the material has been correlated with the observed differences in the microstructures obtained at different positions within the samples under those processing conditions. It has been found that the predicted thermal histories are in good agreement with those obtained from measurement and the differences observed in microstructures are also consistent with those expected on the basis of the predicted thermal histories of the samples at given locations.

Original languageEnglish
Number of pages10
Publication statusPublished - 1 Dec 2005
Externally publishedYes
EventInternational Congress on Applications of Lasers and Electro-Optics 2005 - Miami, United States of America
Duration: 31 Oct 20053 Nov 2005
Conference number: 24th


ConferenceInternational Congress on Applications of Lasers and Electro-Optics 2005
Abbreviated titleICALEO 2005
Country/TerritoryUnited States of America

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