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Benson, Michael L.
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article
A nondestructive HKL-planes analysis of a nano-precipitate-strengthening alloy study
Abstract
<p>The HASTELLOY® C-22HS™ alloy is a corrosion-resistant nickel-based alloy in a faced-center-cubic (FCC) crystal structure. The heat-treated aging process produces the nano precipitates in the matrix and the yield strength of the aged alloy is doubled at both room temperature and 595°C. In the present study, the tensile behavior of the alloy was examined by insitu neutron-diffraction at room temperature. The peak-width of the hkl plane from both the nano-precipitates and the matrix were determined as a function of the different applied stress. The different evolutions of the peak-widths from the matrix to the precipitates during the monotonictension- loading experiments clearly demonstrated that the particle-shearing mechanism. The effect of the nano-precipitate strengthening mechanism has been examined by this in-situ neutron experiments under tensile tests in this study. It reflects clearly the importance of the nondestructive in-situ neutron experiments examining the diffraction profile evolutions coupled with the mechanical measurements.</p>