| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Use of Large Scale Facilities to Understand the Physical Metallurgy of Fe-based Alloys
|
| Presentation Title |
Stress Tensor Determination during Phase Transformation of a Metal Matrix Composite using In situ High Energy X-ray Diffraction |
| Author(s) |
Guillaume Geandier, Lilian Vautrot, Benoît Denand, Sabine Denis |
| On-Site Speaker (Planned) |
Guillaume Geandier |
| Abstract Scope |
In situ high energy X-ray diffraction using a synchrotron source performed on a steel metal matrix composite reinforced by TiC allows following the evolutions during cooling of the phase fractions and the mean cell parameters (Rietveld analysis). Using a radiation furnace with a controlled rotation of the specimen, the evolutions during cooling of the components of the stress tensor in the composite can be obtained. Thus, it has been shown that the matrix and the reinforcements are under a hydrostatic stress state all along cooling even during the phase transformation. Using the stress free cell parameters and their evolutions with temperature, it comes out that from 900°C to the martensitic transformation, the compressive stresses increase in the reinforcements and small compressive stresses exist in the austenite. As the transformation occurs the stresses relax largely in the reinforcements, the compressive stresses increase in the austenite and the martensite undergoes tensile stresses. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |