Observation of microstructure evolution during inertia friction welding using in-situ synchrotron X-ray diffraction

DOI: 10.1107/S1600577521001569

Authors: Matthew Rowson (University of Nottingham) , Chris J. Bennett (University of Nottingham) , Mohammed Azeem (University of Leicester; University College London; Research Complex at Harwell) , Oxana Magdysyuk (Research Complex at Harwell) , James Rouse (University of Nottingham) , Ryan Lye (University of Nottingham) , Joshua Davies (University of Nottingham) , Simon Bray (Rolls-Royce plc) , Peter D. Lee (University College London (UCL))
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Synchrotron Radiation , VOL 28

State: Published (Approved)
Published: May 2021
Diamond Proposal Number(s): 19235

Abstract: The widespread use and development of inertia friction welding is currently restricted by an incomplete understanding of the deformation mechanisms and microstructure evolution during the process. Understanding phase transformations and lattice strains during inertia friction welding is essential for the development of robust numerical models capable of determining optimized process parameters and reducing the requirement for costly experimental trials. A unique compact rig has been designed and used in-situ with a high-speed synchrotron X-ray diffraction instrument to investigate the microstructure evolution during inertia friction welding of a high-carbon steel (BS1407). At the contact interface, the transformation from ferrite to austenite was captured in great detail, allowing for analysis of the phase fractions during the process. Measurement of the thermal response of the weld reveals that the transformation to austenite occurs 230 °C below the equilibrium start tem­per­ature of 725 °C. It is concluded that the localization of large strains around the contact interface produced as the specimens deform assists this non-equilibrium phase transformation.

Journal Keywords: inertia friction welding; time-resolved synchrotron diffraction; phase transformation; non-equilibrium phase transformation.

Subject Areas: Materials, Engineering


Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

Documents:
fv5130.pdf

Discipline Tags:

Engineering & Technology Industrial Engineering

Technical Tags:

Diffraction Serial Synchrotron Crystallography (SSX) Time Resolved Serial Synchrotron Crystallography (TR-SSX)