University of Nevada, Las Vegas
Las Vegas (Nev.)
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One of the greatest challenges in evaluating the performance of materials in the real world is the determination of residual stresses, or the stresses induced in a material. Plastic deformation of metals and alloys produces an increase in the number of lattice imperfections known as dislocations, which by virtue of their interaction results in higher state of internal stress and reduces ductility. These stresses, if not properly annealed (released) can significantly degrade the long-term performance of the materials.
Due to the high temperatures and radiation fields typically encountered in most nuclear systems, such as accelerator-driven transmutation systems (ADS) and nuclear power reactors, the residual stress in materials can be even more significant. To minimize the impact of residual stress, most designs limit the residual stresses allowed in the structural materials in the systems. As a result, the ability to measure these residual stresses, while potentially challenging, is essential to the design and operation of nuclear systems.
Austenitic stainless steel; Deformations (Mechanics); Martensitic stainless steel; Nuclear reactors — Materials — Testing; Plasticity; Strains and stresses
Austenitic stainless steel; Martensitic stainless steel; Nuclear reactors--Materials--Testing
Materials Science and Engineering | Metallurgy | Nuclear Engineering | Oil, Gas, and Energy
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Roy, A. K.
Use of Positron Annihilation Spectroscopy for Stress-Strain Measurements.
Available at: https://digitalscholarship.unlv.edu/hrc_trp_sciences_materials/113