Authors:
Jozef McGowan (University of Sheffield, United Kingdom)
Jack Krohn (University of Sheffield, United Kingdom)
Alexander Graves (Sandvik Coromant, Sweden)
Martin Jackson (University of Sheffield, United Kingdom)
Abstract:
Titanium machining often involves significant chemical interactions at the tool-workpiece interface, commonly studied using diffusion couples. Field-Assisted Sintering Technology (FAST) forging reduces the dwell times of traditional furnace-made methods from 24 to 2 hours by surrounding a sample with metallic powder before heating. However, it remains unclear how the diffusion process is influenced when the powder is pre-sintered or sintered during the creation of the diffusion couple. Therefore, this study directly compares pre- and post-sintered titanium under conditions simulating machining with tungsten carbide inserts. Three diffusion couples were placed in a FAST furnace with different titanium grades, using a unique design for simultaneous comparison of powder-solid and solid-solid interfaces between the two material systems. The results provide insights into the efficiency of FAST over traditional methods for simulating chemical interactions during machining, which are essential for providing tool suppliers with the knowledge required to improve their tools.
DOI:
https://doi.org/10.59499/EP256767107
