|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Frontiers in Solidification: An MPMD Symposium in Honor of Michel Rappaz
||Hot Tearing: After the Rappaz-Drezet-Gremaud Criterion, Where Are We?
||Jean-Marie Drezet, Nicolas Chobaut, Michael Drakopoulos, Thilo Pirling
|On-Site Speaker (Planned)
Solidification cracking, also known as hot tearing, is a detrimental defect in casting and welding. M. Rappaz and co-workers have made a substantial progress in the understanding of hot tear initiation by publishing in 1999 the so-called RDG hot tearing criterion after the names of its authors. Since then progress has been made on the numerical side with the development of 2D/3D hydromechanical granular models coupled with grain coalescence aimed at predicting both hot tear formation and stress–strain behavior in metallic alloys during solidification. On the experimental side in situ X-ray and neutron diffraction measurements during the solidification of alloys have been carried out. The analysis of the peak shift during cooling allowed us to highlight the fact that hot tearing is a dynamic process made of stress buildup due to the accumulation of macroscopic strains followed by stress relaxation associated with the nucleation of micropores and hot tears.