| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Composition–Processing–Microstructure-Property Relationships of Titanium Alloys
|
| Presentation Title |
G-3: Heterogeneous Nano-Mechanical Response of Bimodal Ti-6Al-4V Alloy |
| Author(s) |
Saumya Gupta, Shibayan Roy |
| On-Site Speaker (Planned) |
Saumya Gupta |
| Abstract Scope |
The microstructure of Ti-6Al-4V alloy evolves through a multi-stage thermo-mechanical processing (TMP) schedule that determines majority of subsequent mechanical properties. Spheroidization is a key process for microstructure and micro-texture determination. It invariably brings significant heterogeneity within the bimodal microstructure, although the exact nature is unknown yet and require more investigation, especially its impact on the ensuing mechanical properties. In the present study, as-cast (AC) alloy having lamellar microstructure is hot compressed at 1000°C under 1s-1 strain rate, forming a spheroidized alloy with bimodal microstructure. The mechanical response of several lamellae and spheroidized grains were identified by nano-scratching at ambient conditions. The deformed regions were further investigated by electron backscatter diffraction (EBSD) to correlate with the crystallographic orientation and micro-texture. The individual topography captured through in-situ scanning probe microscopy (SPM) imaging confirm the intra-lamellar or intra-grain heterogeneity as a function of orientation from a varying depth profiles along the scratch track. |