Temperature-Dependent Material Property Databases for Marine Steels - Part 6: HY-100
Abstract:
A LIFT project sought to address distortion issues with thin-plate steel fabrication of U.S. Navy ships. ICME-based tools and techniques were identified as the best path forward for distortion mitigation through computational simulation of the welding process. ICME tools require temperature-dependent material properties to achieve accurate computational results for distortion and residual stress. Properties of note include specific heat, thermal conductivity, CTE, elastic modulus, yield strength, and flow stress of alloys from room temperature to near melting. In addition, the temperatures associated with on-heating and on-cooling phase transformations and their variation with heating rate, cooling rate, and peak temperature are also important for the prediction of stress and distortion evolution. The integrated project team made generating pedigreed, temperature-dependent material property databases of Navy-relevant steels a key task within the LIFT project. The testing plan included some of the most common marine steels used in the construction of U.S. Naval vessels; namely, DH36, HSLA-65, HSLA-80, HSLA-100, HY-80, and HY-100. Material testing for each of the six steel grades was performed jointly by the Welding Engineering Program at the Ohio State University and the Welding, Processing, and NDE Branch at the Naval Surface Warfare Center, Carderock Division (NSWCCD). The temperature-dependent material property data were then sent to ESI for adaptation for use in their welding-based, FEA software colloquially known as SYSWELD. This report is part of a seven-part series detailing the pedigreed steel data. The first six reports will report and discuss the material properties for each of the individual steel grades, whereas the final report will compare and contrast the measured steel properties across all six steels, while also comparing them to the available literature data. This report will focus specifically on the data associated with HY-100 steel.