Real-time evolution of texture and temperature during friction stir processing of a magnesium alloy: An operando neutron diffraction study

Li, Yuan; Hou, Peijun; Kamath, Rakesh R.; Feng, Zhili; An, Ke; Choo, Hahn

doi:10.1016/j.actamat.2024.119842

Real-time evolution of texture and temperature during friction stir processing of a magnesium alloy: An operando neutron diffraction study

Journal Article · Wed Mar 20 00:00:00 EDT 2024 · Acta Materialia

DOI:https://doi.org/10.1016/j.actamat.2024.119842· OSTI ID:2447308

^[1]; Hou, Peijun ^[1]; ^[1]; ^[2]; ^[2]; ^[1]

Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

The real-time development of texture and the evolution of temperature during friction stir processing (FSP) of a Mg alloy were investigated using an operando neutron diffraction measurement. A novel approach was applied in this study where the real-time, quasi-steady state measurements performed as a function of position during FSP are converted to a Lagrangian dataset that reveals the transient behavior as a function of time. The in-situ FSP was carried out under two different thermo-mechanical processing conditions represented by the Zener-Hollomon parameter, Z. Further, the results show that: (i) a shear texture develops from the initial strong basal texture with the peak temperature reaching about 774 K during a low-Z processing and (ii) a strong off-normal texture develops with a peak temperature of 616 K during a high-Z processing. Moreover, time-temperature-texture diagrams were established to reveal the real-time development of the texture during the processing for both the low Z and high Z processing conditions. The changes in texture will be discussed in terms of plastic deformation mechanisms active during various stages of the FSP under the two different processing conditions.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 2447308

Journal Information:: Acta Materialia, Journal Name: Acta Materialia Vol. 270; ISSN 1359-6454

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Real-time evolution of texture and temperature during friction stir processing of a magnesium alloy: An operando neutron diffraction study

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