Acquisition of Microscopic and Local Stress-Strain Curves by Combination of HR-EBSD and DIC Methods

A method for obtaining microscopic and localized stress-strain curves is proposed by combining strain measurements using the digital image correlation (DIC) method with stress measurements using high-resolution electron backscattered diffraction (HR-EBSD). A dataset containing 11 steps of stress–strain information in a single subset was created by applying georeferencing to DIC strain maps and HR-EBSD stress maps measured in a deformation-interrupted microstructure. This analysis allowed us to obtain local stress-strain curves and strain energy maps of polycrystalline nickel alloys. A comparison of the stress-strain curves obtained from any subset in the map revealed that these curves show extremely diverse shapes depending on the location in the microstructure.

Keywords: electron backscattering diffraction (EBSD), digital image correlation (DIC), deformation structure, internal stresses, tension test

Suggested Citation: Suggested Citation

Yamasaki, Shigeto and Matsuo, Hirofumi and Morikawa, Tatsuya and Tanaka, Masaki, Acquisition of Microscopic and Local Stress-Strain Curves by Combination of HR-EBSD and DIC Methods. Available at SSRN: https://ssrn.com/abstract=4416211 or http://dx.doi.org/10.2139/ssrn.4416211