Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1637623 | Transactions of Nonferrous Metals Society of China | 2011 | 6 Pages |
Abstract
The grain refinement of superalloy IN718 under the action of low voltage pulsed magnetic field was investigated. The experimental results show that fine equiaxed grains are acquired under the action of low voltage pulsed magnetic field. The refinement effect of the pulsed magnetic field is affected by the melt cooling rate and superheating. The decrease of cooling rate and superheating enhance the refinement effect of the low voltage pulsed magnetic field. The magnetic force and the melt flow during solidification are modeled and simulated to reveal the grain refinement mechanism. It is considered that the melt convection caused by the pulsed magnetic field, as well as cooling rate and superheating contributes to the refinement of solidified grains.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Ying-ju LI, Xiao-ping MA, Yuan-sheng YANG,