Structure and Deformation Characteristics of Rheocast Metals.
Abstract
During the past two years a number of Thixoforging systems (reheat furnaces with pentrometers and heated dies adapted to existing hydraulic presses) were designed, constructed and operated. These include: Two laboratory apparatuses with 50-ton hydraulic presses and a pilot plant size system with a 200-ton forging press. The continuous Rheocasting apparatus was modified and located near the large press to permit direct transfer of partially solid charge material to the dies without going through a solidification and reheating cycle. Experiments on the high temperature slurry producer showed that primary solid particle size in Rheocast cobalt-base Haynes alloy 31 and 4340 low alloy steel are of the same size as primary dendrite arm spacings in conventional specimens solidified under identical cooling rats. A theoretical model previously developed for homogenization (solution) heat treatment of Rheocast structures was used in the heat treatment of 2024 aluminum alloy forged specimens. The specific phases in this alloy before and after homogenization heat treatment were identified using an Electron Microprobe.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1979
- Accession Number
- ADA068120
Entities
People
- C. Y. Chen
- D. G. Backman
- G. J. Abbaschian
- J. A. Sekhar
- R. Mehrabian
Organizations
- University of Illinois Urbana–Champaign