Fiscal Year	2011
Division	Graduate School of Engineering & Applied Science
Department	Mechanical & Aerospace Engineering
Investigator(s)	Brewer, Luke N.
Sponsor	Office of the Secretary of Defense (DoD)
Summary	This proposal is for funding to determine the feasibility of performing x-ray diffraction-based measurements of residual stress aboard naval vessels. We will use the laboratory x-ray diffractometer at the Naval Postgraduate School to measure residual stresses in welded AA5456 and AA5083 plate material. These residual stress measurements will be combined with stress corrosion cracking measurements to evaluate the potential of this approach for predicting and mitigating stress corrosion cracking of sensitized marine aluminum plate. We will quantify the sensitivity of the x-ray residual stress approach and will characterize the potential difficulties from crystallographic texture, displacement errors, and multiple phases.
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Publications	Publications, theses (not shown) and data repositories will be added to the portal record when information is available in FAIRS and brought back to the portal
Data	Publications, theses (not shown) and data repositories will be added to the portal record when information is available in FAIRS and brought back to the portal