Journal of research of the National Bureau of Standards · 1949 · 75 citations · 0 references
Natural SciencesMaterials EngineeringMaterials ScienceInstrumentationMaterials CharacterizationMechanical Behavior Of MaterialsAnalytical InstrumentationElectrode MaterialsStrain MeasurementStress-strain BehaviorThin Film Mechanical PropertiesCurvature-based Stress AnalysisExperimental Stress AnalysisGrain Size VariabilityStress MeasurementStress-strain Curve
An improved instrument for the measurement of stress in electrodeposits is described. Its operation entails the electrodeposition of a metal coating on the outside of a metal hclix and the measurement of the change in radius of curvature of the helix induced by t he stress in the electrodeposit. The change in radius of curvature is read from a dial OIl the instrument. Formulas for the calculation of stress are given, and so urces of error and corrcction factors for them disc u ed. Data are ,Presented to demonstrate t he r eproducibility of measurcments and the validity of the res ults. The variation of stress \\'ith plate thickne s has been inve tigated and shown to be related to the variation in grain size of the deposit. The advantages of the instrument and field s for its application nre indicated.