%0 Journal Article
%T Microstructural Modeling of Thermally-Driven ¦Â Grain Growth, Lamellae & Martensite in Ti-6Al-4V
%A Matteo Villa
%A Jeffery W. Brooks
%A Richard P. Turner
%A Mark Ward
%J Modeling and Numerical Simulation of Material Science
%P 55-73
%@ 2164-5353
%D 2020
%I Scientific Research Publishing
%R 10.4236/mnsms.2020.103004
%X The microstructural kinetics of <i>¦Â</i> grain growth in the <i>¦Â</i> field of a
Ti-6Al-4V alloy was studied by a series of controlled heat treatments at
constant temperature rates. Heating rates of 5<span style=\"white-space:nowrap;\">¡ã</span>C/s, 50<span style=\"white-space:nowrap;\">¡ã</span>C/s and 500<span style=\"white-space:nowrap;\">¡ã</span>C/s were
considered, stopping at different peak temperatures. The thickness evolution of
martensitic needles and lamellar <i>¦Á</i> laths, formed on cooling, was also investigated, by soaking the material above
its <i>¦Â</i>-transus temperature and cooling
down at 5<span style=\"white-space:nowrap;\">¡ã</span>C/s, 50<span style=\"white-space:nowrap;\">¡ã</span>C/s, 100<span style=\"white-space:nowrap;\">¡ã</span>C/s and 300<span style=\"white-space:nowrap;\">¡ã</span>C/s till ambient temperature.
Quantitative microstructural analyses were used to measure the particle
dimensions. The <i>¦Â</i> grain growth
kinetics was reasonably well described by a modified Avrami equation. The thickness
of <i>¦Á</i> lamellae was a function of the
cooling rate and the <i>¦Â</i> grain
dimension in which they nucleated. The martensite needle thickness was shown to
be a function of the cooling rate to which the material was subjected.
%K Titanium
%K Welding
%K Rapid Heating
%K Phase
%K Alpha
%K Beta
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=101556