In situ study of sigma phase formation in Cr–Co–Ni ternary alloys at 800°C using the long duration experiment facility at Diamond Light Source

Abstract

The capabilities of the new long duration experiment facility at Diamond Light Source are demonstrated through a study of phase evolution in Cr–Co–Ni alloys using in situ X-ray diffraction.

Precipitation kinetics in metallic alloys: Experiments and modeling

“…The lower limit in volume fraction that can be detected by SAS depends strongly on the contrast, however as a rule of thumb it lies roughly between 0.01 and 0.1 %. When dealing with larger precipitates of significant volume fraction (>1%), in-situ X-ray diffraction (XRD) is more adapted [39][40][41][42]. It gives a more direct access to the volume fraction when the crystal structure of the precipitates is known and in cases where the material's texture is sufficiently random.…”

Sigma Phase Detection in Duplex Stainless Steel Based on Correlation to Current and Potential in Micro Electrode Electrochemical of Surface

“…The microstructural arrangement of intermetallic σ presents a ternary phase whose formation is based on high chromium content 11 . This phase's precipitation mainly takes place at the ferrite/austenite interface and it is often generated by increased chromium diffusion from the ferritic phase to the grain boundary [12][13][14][15] .…”

A new high temperature, high heating rate, low axial gradient capillary heater

“…Larger resistance furnaces have been used for X-ray diffraction experiments, notably Linkam furnaces used on a number of beamlines (Connor et al, 2018). These are capable of reaching high temperatures (1500 C) and ramp rates (200 C min À1 ) (Oversluizen et al, 1995;Bras & Ryan, 1998) and seem like a good option for solid state measurements, though the enclosed system may limit sample environment options.…”