Real Time Monitoring of the Strain Evolution during Rapid Heat Treatment of Steel Samples by Means of Synchrotron X-Ray Diffraction

Abstract:

An innovative experimental set-up for fast X-ray diffraction analysis on polycrystalline materials has been established at the synchrotron radiation facility ANKA (Karlsruhe, Germany). Key components of the set-up are two fast microstrip line detectors arranged symmetrically around the incident beam in the backscatter region. The capabilities of the set-up are tested by means of in-situ heat treatment experiments on SAE 4140 steel samples. In this feasibility study the heat was introduced by means of either a heating stage or by means of a gas tungsten arc welding torch. It will be shown that the evolution of thermal and elastic lattice strains can be monitored at a sampling rate of up to 4 Hz at a bending-magnet synchrotron beamline. Since the sampling rate may be increased further at a insertion device synchrotron beamline providing higher photon flux, our setup appears to be feasible for monitoring laser treatments in real time.

• Periodical: Materials Science Forum (Volumes 638-642)
• Pages: 2423-2428
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.638-642.2423
• Online since: January 2010
• Authors: Vladimir Kostov, Jens Gibmeier, Stephen Doyle, Alexander Wanner
• Keywords: In Situ Strain Analysis, Real-Time Monitoring, Synchrotron X-Ray Diffraction

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