Abstract
A benchmark study was undertaken for casting residual stress measurements through neutron diffraction, which was subsequently used to validate the accuracy of simulation prediction. The ''stress lattice'' specimen geometry was designed such that subsequent castings would generate adequate residual stresses during solidification and cooling of ductile cast iron, without any cracks. The residual stresses in the cast specimen were measured using neutron diffraction. Considering the difficulty in accessing the neutron diffraction facility, these measurements can be considered as a benchmark for casting simulation validations. Simulations were performed using the identical specimen geometry and casting conditions for predictions of residual stresses. The simulation predictions were found to agree well with the experimentally measured residual stresses. The experimentally validated model can be subsequently used to predict residual stresses in different cast components. This enables incorporation of the residual stresses at the design phase along with external loads for accurate predictions of fatigue and fracture performance of the cast components.
| Original language | English |
|---|---|
| Pages (from-to) | 1487-1496 |
| Number of pages | 10 |
| Journal | Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science |
| Volume | 43 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 2012 |
Funding
Research at the 2nd Generation Neutron Residual Stress Mapping Facility at the High Flux Isotope Reactor was partially sponsored by the United States Department of Energy, Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Program, through the Oak Ridge National Laboratory’s High Temperature Materials Laboratory User Program, and by the Scientific User Facilities Division, Office of Basic Energy Sciences, United States Department of Energy. Notice: This manuscript has been authored by UT–Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the United States Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledge that the United States Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. Disclaimer notice: This document was prepared by Eric Johnson as a result of the use of facilities of the United States Department of Energy (DOE) that are managed by UT–Battelle, LLC. Neither UT–Battelle, LLC, DOE, or the United States government, nor any person acting on their behalf: (a) makes any warranty or representation, \express or implied, with respect to the information contained in this document; or (b) assumes any liabilities with respect to the use of, or damages resulting from the use of, any information contained in the document.