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Macrosegregation during dendritic arrayed growth of hypoeutectic pb-sn alloys: influence of primary arm spacing and mushy zone length
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Shah, R. Tewari, S. N. |
| Copyright Year | 1996 |
| Description | Thermosolutal convection in the dendritic mushy zone occurs during directional solidification of hypoeutectic lead tin alloys in a positive thermal gradient, with the melt on the top and the solid below. This results in macrosegregation along the length of the solidified samples. The extent of macrosegregation increases with increasing primary dendrite spacings for constant mushy zone length. For constant primary spacings, the macrosegregation increases with decreasing mushy zone length. Presence of convection reduces the primary dendrite spacings. However, convection in the interdendritic melt has significantly more influence on the spacings as compared with that in the overlying melt, which is caused by the solutal buildup at the dendrite tips. |
| File Size | 1319959 |
| Page Count | 10 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19970022217 |
| Archival Resource Key | ark:/13960/t3mw7c91w |
| Language | English |
| Publisher Date | 1996-05-01 |
| Access Restriction | Open |
| Subject Keyword | Metallic Materials Tin Alloys Directional Solidification Crystals Separation Dendritic Crystals Temperature Gradients Lead Alloys Eutectic Alloys Spacing Rayleigh Number Convection Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
