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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Neutron and X-ray Scattering in Materials Science and Engineering
Presentation Title Effects of Cooling Rates on Residual Stress Evolution Quantified via Neutron Diffraction in Lubricant-free, Solid-state Repaired AA7075
Author(s) Ning Zhu, Ryan Kinser, Jacob Strain, Luke Brewer, Paul Allison, Brian Jordon
On-Site Speaker (Planned) Ning Zhu
Abstract Scope Round feedstock additive friction stir deposition (RF-AFSD) was developed to additively manufacture or repair structural components without the need to pre-spray any lubricant on the feedstock materials, thereby preventing chemical contamination. In this work, RF-AFSD was used to repair AA7075-T6 plates with a milled groove, employing three different cooling rates controls: ambient cooling in open atmosphere, passive cooling by submerging in water, and actively cooling using a backing chiller plate. The evolution of residual stresses in those repairs, with different cooling rates, was quantified via neutron diffraction at the HIDRA beamline at ORNL. Process-structure-property correlations were established from the quantified results, which included temperature and torques data during the RF-AFSD process, grain size measurements from the microstructure, and the distribution of residual stress and microhardness in the repairs produced at different cooling rates.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Aluminum, Characterization

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Anomalous Neutron Nuclear-Magnetic Interference Spectroscopy
Application of energy-dispersive X-ray diffraction for engineering alloys
Back-grinding for Improved X-Ray Diffraction
Characterization of Radiation Effects in Ceramics with Neutron Total Scattering
Effects of Cooling Rates on Residual Stress Evolution Quantified via Neutron Diffraction in Lubricant-free, Solid-state Repaired AA7075
Elucidating the phase evolution of a spinodal Au-Pt-Pd alloy using in situ synchrotron X-ray diffraction
Enhanced magnetic-disorder driven magnon softening of TbSb via Y-doping
Feasibility of a Focusing Small-Angle Neutron Scattering (SANS) Instrument at the MIT Nuclear Reactor Laboratory
From Angstroms to Micrometers: Across-length-scale Structural Characterization of Hard Materials via X-ray Scattering
HIPPO meets ERNI & BERT – Upgrading a neutron diffractometer with an energy-resolved neutron imaging detector
Impact of electric fields on local structure, phonons, and thermal transport in a relaxor ferroelectric
In-situ and multimodal capabilities of Laue diffraction instrument at 34-ID-E of the Advanced Photon Source
In-situ characterization of phase transformation dynamics in fusion-based metal additive manufacturing processes by high-speed X-ray diffraction
In situ X-ray diffraction reveals the early stages of solid phase alloying in the 7XXX Al alloy system
Influence of Selective Laser Preheating on Residual Stress in Ti-6Al-4V Laser Powder Bed Fusion (LPBF)
Investigating Thermal Transport in Nuclear Materials Using Neutron Scattering
Load Partitioning in Eutectic and Near-eutectic Ni-Ce Alloys
Machine Learning Models For X-ray Diffraction Temperature Inference
Mapping of the local residual stress in 316L stainless steel processed by laser powder bed fusion
Measurement of Residual Stress in Additively Manufactured Ti-6Al-4V & Ti-6Al-2Sn-4Zr-6Mo Walls using Neutron Diffraction
Operando inelastic neutron scattering measurements of glass dynamics
Operando X-ray and neutron diffraction and imaging during laser powder bed fusion
Overview of science capabilities of VENUS neutron imaging beamline at the Spallation Neutron Source at Oak Ridge National Laboratory
Phonon Dynamics and Thermal Transport in Tl3VSe4
Planar thermal transport mapping of the GaN film with Spatial-Temporal-Resolved X-ray diffraction
Probing Ionic Diffusion with Single Crystal Diffuse and Quasielastic Neutron Scattering
Rationalization of non-uniform radial hardness distribution in friction self-piercing riveted Al-7075 using x-ray scattering and advanced microscopy techniques
Redistribution of Residual Stress in Steels during Hybrid Manufacturing
Residual Strain Monitoring by Neutron Diffraction in Metal Additive Manufacturing
Scattering study of spin-lattice interactions in chromia
The development of a stress-strain diffractometer at the MIT Reactor using a polychromatic beam
The influence of grain size on the deformation-induced martensitic transformation in austenitic steels: from grain-average to single-grain behavior studied by in-situ high-energy synchrotron X-ray diffraction.
The Invar Effect Explained by Nuclear Resonant X-ray Scattering from Phonons and Spins
The Role Of Annealing And Grain Boundary Controls On The Mechanical Properties Of Limestones, Marbles And Novaculite
The Role of Vibrational Entropy Across Magnetostructural Transition in Heusler Alloys
The use of neutron diffraction for the understanding of additive manufacturing process of magnesium alloys
Time resolved synchrotron X-ray diffraction study of the structural and mechanical evolutions within a zirconium alloy oxidized at high temperature
Unveiling multiscale structure and dynamics with neutron imaging
Vibrational thermodynamics of the giant elastocaloric effect in NiCoMnTi alloys

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