Enhancement of Grain Refined Microstructure in a Nanostructured Metals via Ultrahigh Pressure Hydrostatic Consolidation Process - Construction of Master Sintering Curve (MSC) and Its Application to Densification of Al-Mg Alloy
Abstract
Previously Al-Mg alloy was densified by hot isostatic processing and subsequently consolidated by hydrostatic extrusion. Through this process high strength and high formability nanostructured bulk Al-Mg alloy was fabricated. However, it is important to handle parametric control in powder metallurgical processing in terms of relative density, which is closely associated with its mechanical properties in acquiring a material of a desired property. At current stage processing parameter of density function is not controllable. In this study a concept of Master Sintering Curve (MSC) theory was introduced and applied to the examined material during densification to obtain a unified MSC allowing for predicting density variation in terms of only sintering time and temperature in regardless of thermal history at certain compaction pressure. After completing MSC new experimental set of time-temperature data were fitted to validate the derived MSC curve in such a way that it is completely coincident with new set of experimental data in tolerable error. Hardness measurement was conducted to study the effect of heating rates.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 30, 2010
- Accession Number
- ADA513789
Entities
People
- Sangmok Lee