|About this Abstract
||Materials Science & Technology 2017
||Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work – Rustum Roy Symposium
||Effect of Density and Crystallization on the Hardness of Spark Plasma Sintered Fe – based Bulk Amorphous Alloy
||Tanaji Paul, Sandip P. Harimkar
|On-Site Speaker (Planned)
Spark plasma sintering of Fe48Cr15Mo14Y2C15B6 amorphous alloy powder with wide normal distribution of particle sizes resulted in large increments in relative density of about 98% in the supercooled liquid region due to drastic reduction in the viscosity of the alloy. At higher temperatures densification reduced considerably as the formation of medium range ordering clusters and nanocrystals of complex carbides led to stiffening of the alloy. Occurrence of crystals below the crystallization onset temperature was attributed to the current – generated local difference in temperature in the sample and that measured by the thermocouple which was estimated to be between 31 to 53oC at a heating rate of 100oCmin-1. Densification of the sintered alloy together with the impediment to the propagation of shear bands by strain fields surrounding the fine carbides dispersed within it brought about hardening up to 1375VHN.