| 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 |
In-situ Synchrotron X-ray Diffraction Stress Analysis during Laser Surface Line Hardening of Samples with Specific Geometric Features |
| Author(s) |
Dominik Kiefer, Jens Gibmeier, Fabian Wilde, Felix Beckmann |
| On-Site Speaker (Planned) |
Jens Gibmeier |
| Abstract Scope |
Recently, a synchrotron X-ray diffraction based measuring strategy was established for real time monitoring of local stress development and phase transformations during laser surface hardening of steel samples. Here, we report about AISI 4140 steel samples that were line hardened using a 4 kW high power diode laser while controlling the maximum surface temperature. In-situ X-ray diffraction analyses during temperature controlled laser hardening experiments were carried out at the synchrotron beamline P05@PETRAIII at DESY in Hamburg using a photon energy of 10.9 keV. Local phase transformation kinetics and stress evolution at the sample surface were monitored at a rate of 50 Hz with a spatial resolution of <Ø1 mm. To quantify sample geometry effects on the stress formation and hence the residual stress state in the process zone, samples with specific geometric features (surface curvatures with defined radii and bridged structures) were investigated and compared with results of flat specimen. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |