fig1

Figure 1. Principle of in-situ synchrotron and neutron diffraction during tensile testing of super-thick steels. (A) During the uniaxial tensile test, a high-energy synchrotron X-ray beam and a neutron beam intersect the sample, and the diffracted beams are collected by downstream detectors. (B) Representative diffraction patterns of the segregated (Q355) and non-segregated (Q370) samples. The raw as-cast super-thick steels contain a ferrite matrix along with retained austenite and carbide phases, as identified from the diffraction data.