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| Naji, M. |
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| Petrov, R. H. | Madrid |
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| Azevedo, Nuno Monteiro |
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| Rignanese, Gian-Marco |
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Kannan, R.
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Topics
Publications (6/6 displayed)
- 2023Operando neutron diffraction reveals mechanisms for controlled strain evolution in 3D printingcitations
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- 2017Role of structural modifications of montmorillonite, electrical properties effect, physical behavior of nanocomposite proton conducting membranes for direct methanol fuel cell applicationscitations
- 2017Effect of target power on the physical properties of Ti thin films prepared by DC magnetron sputtering with supported dischargecitations
- 2016Facile synthesis and characterization of a reduced graphene oxide/halloysite nanotubes/hexagonal boron nitride (RGO/HNT/h-BN) hybrid nanocomposite and its potential application in hydrogen storagecitations
- 2014Effect of Substrate Bias Voltage on the Physical Properties of Zirconium Nitride (<font>ZrN</font>) Films Deposited by Mid Frequency Reactive Magnetron Sputteringcitations
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article
Operando neutron diffraction reveals mechanisms for controlled strain evolution in 3D printing
Abstract
<jats:title>Abstract</jats:title><jats:p>Residual stresses affect the performance and reliability of most manufactured goods and are prevalent in casting, welding, and additive manufacturing (AM, 3D printing). Residual stresses are associated with plastic strain gradients accrued due to transient thermal stress. Complex thermal conditions in AM produce similarly complex residual stress patterns. However, measuring real-time effects of processing on stress evolution is not possible with conventional techniques. Here we use operando neutron diffraction to characterize transient phase transformations and lattice strain evolution during AM of a low-temperature transformation steel. Combining diffraction, infrared and simulation data reveals that elastic and plastic strain distributions are controlled by motion of the face-centered cubic and body-centered cubic phase boundary. Our results provide a new pathway to design residual stress states and property distributions within additively manufactured components. These findings will enable control of residual stress distributions for advantages such as improved fatigue life or resistance to stress-corrosion cracking.</jats:p>