Development of crystallographic-orientation-dependent internal strains around a fatigue-crack tip during overloading and underloading

S. Y. Lee*, E-Wen Huang, W. Wu, P. K. Liaw, A. M. Paradowska

*Corresponding author for this work

研究成果: Article

3 引文 斯高帕斯(Scopus)

摘要

In-situ neutron diffraction was employed to directly measure the crystallographic-orientation-dependent (i.e. hkl) internal strains as a function of distance from the crack tip on the pre-cracked Hastelloy C-2000 compact-tension specimen. Both in-plane (IP) and through-thickness (TT) strain evolutions for various grain orientations were examined during tensile overloading and compressive underloading cycles. After overloading, underloading and their combination loadings were applied and unloaded, the significantly different {hkl} residual strain profiles were obtained in the vicinity of the crack tip. The load responses of the {200} grain orientation in both the IP and TT directions were more significant than those of any other orientations. It is suggested that the different orientation-dependent strain distributions around the crack tip are caused by the combined effects of elastic and plastic anisotropy of each {hkl} reflection upon loading and the subsequent development of residual stresses generated near the crack tip during unloading as a result of the plastic deformation.

原文English
頁(從 - 到)7-14
頁數8
期刊Materials Characterization
79
DOIs
出版狀態Published - 2 四月 2013

指紋 深入研究「Development of crystallographic-orientation-dependent internal strains around a fatigue-crack tip during overloading and underloading」主題。共同形成了獨特的指紋。

  • 引用此