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WEB The effect of heat-treatment on micro structure and texture evolution in Ti-6Al-4V alloy and its effect on room temperature tensile properties and deformation mechanism

Tuesday (25.02.2020)
09:56 - 09:56 Poster Room
Part of:
- Poster *web*Investigations of Medieval Zwischgold Samples by means of Transmission Electron Microscopy 1 Dr.-Ing. Julian Müller
- Poster *web*Evolution of bimodal L12 (γ') phase distribution and its effect on mechanical properties in nickel-based alloy 718Plus 1 Barun Bharadwaj Dash
- Poster *web*The effect of heat-treatment on micro structure and texture evolution in Ti-6Al-4V alloy and its effect on room temperature tensile properties and deformation mechanism 1 Shubhashis Dixit
- Poster *web*Benefits of evaluating coatings in real marine enviroment 1 Dipl.-Ing. Aiala Urbegain Garate
- Poster *web*Agglomeration of gold nanoparticles under microgravity conditions 1 Andrea Pyttlik
- Poster *web*Corrosion resistance of a Ni-based brazing alloy in a marine atmospheric exposure 1 Dipl.-Ing. Aiala Urbegain Garate
- Poster *web*Modelling of copper particle – copper wall collision at high velocities 1 Giedrius Jocbalis
- Poster *web*Impact of Strain Tensor on the Microstructure Evolution of Al-Sc-Zr-based Alloy 1 Bengü Tas Kavakbasi
- Poster *web*Template assisted synthesis of mesoporous Pt thin films and their use as electrocatalyst for the oxidation of glycerol 1 Ph.D. Athira Anil
- Poster *web*Structural and Magnetic Characterization of Iron Oxide Nanoparticles upon Chemical Lithiation 1 Seda Ulusoy
- Poster *web*Correlation between electrical and mechanical properties of silver nanowire electrodes studied by complementary in situ microscopy techniques 1 Marco Moninger
- Poster *web*Crack process evaluation in carbon fibre reinforced polymers aged by thermal cycling 1 Prof. Dr.-Ing. Fernando Lasagni

Session -C: Characterization
Belongs to:
Topic X: Poster Session

Ti-6Al-4V, an α+β titanium alloy, is widely used in the aerospace industry due to its excellent properties such as high strength-to-weight ratio, good corrosion resistance, formability and excellent medium temperature capabilities. The Ti-6Al-4V alloy was received as a hot-rolled bars, having initially a bimodal microstructure. It was heat-treated to produce three different microstructures (Lamellar, Equiaxed and Bimodal). A variation in phase fraction (α / β phase fraction) and morphology was achieved by altering soaking temperature and cooling rate. β-treatment (1050°C/1hr/Air Collinig) of hot rolled structure resulted in lamellar microstructure. A further variation of microstructures i.e. equiaxed and bimodal was achieved by varying the soaking temperature (900°C and 950°C, 4 hours soaking time) followed by furnace cooling and air cooling respectively. The dimensions and volume fraction of microstructural constituents were measured using quantitative stereology. As α phase is the major constituent of all the microstructures [1], electron backscatter diffraction (EBSD) technique was employed to investigate the orientation and distribution of α phase. Transmission electron microscope (TEM) was used to characterize the evolution of dislocation substructure in α grains which formed due to recrystallization and strain associated with β to α transformation [2]. Room temperature tensile test was conducted for as received (hot rolled) as well as heat-treated microstructures to correlate the effect of microstructural variations with mechanical properties. Scanning electron microscope was used to understand failure mechanism. EBSD technique was used to characterize strain localization and neighbouring grain orientation. A detailed study of dislocation interaction in α phase was carried out using TEM.

Shubhashis Dixit
Indian Institute of Technology Madras
Additional Authors:
  • Dr. Amit Bhattacharjee
    Defence Metallurgical Research Laboratory
  • Prof. Shanmugam Sankaran
    Indian Institute of Technology, Madras