|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||2023 Technical Division Student Poster Contest
||SPG-21: Development of a Generalized Fatigue Assessment Approach for Steel Castings
||Matthew Batson, Brian Jordon, Paul Allison, Yu Hong
|On-Site Speaker (Planned)
In this project, a fracture mechanics model is being developed to employ qualities present in steel castings to make fatigue life predictions. Due to conservative restrictions on castings, a simplified approach is needed to determine the quantitative effect casting features have on fatigue life. Samples of 4130 and A487 steel are undergoing tensile, hardness, and fatigue testing followed by post-mortem fractographic analysis of features such as shrinkage porosity and gas pores. This information along with crack growth data and non-destructive evaluation is being analyzed to create a model that incorporates fracture mechanics principles into fatigue prediction. Calculations from the Paris equation show improved correlation when designating discontinuity measurements as initial cracks. Other data and material properties will be incorporated to establish a method of determining a maximum stress value or pore size. This method will then be applied to cast steel literature data to demonstrate its effectiveness.