Modelling and experiments concerning dendrite re-melting and its role in microstructural evolution in spray formed Ni superalloys
This paper presents a combined experimental and modelling approach to understand dendrite fragmentation of atomised metal alloy droplets during deposition in spray forming, and to study quantitatively the relationship between this dendrite fragmentation behavior and subsequent microstructural evolut...
| Main Authors: | , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2010
|
| _version_ | 1797068613951160320 |
|---|---|
| author | Zhang, Y Guo, Z Zhang, G Mi, J Grant, P |
| author_facet | Zhang, Y Guo, Z Zhang, G Mi, J Grant, P |
| author_sort | Zhang, Y |
| collection | OXFORD |
| description | This paper presents a combined experimental and modelling approach to understand dendrite fragmentation of atomised metal alloy droplets during deposition in spray forming, and to study quantitatively the relationship between this dendrite fragmentation behavior and subsequent microstructural evolution. A Gleeble 3500 physical simulator was used to create controlled thermal shock conditions in solid-liquid mixtures of Ni superalloy IN718 atomised powders, which simulated the environment of droplet deposition during the twin-atomiser spray forming of large diameter IN718 alloy billets at BIAM. The experiments were complemented by phase field modelling studies at Oxford. Experiment and modelling supported the hypothesis that the characteristic equiaxed spray formed microstructure depends critically upon the rapid remelting and thermal shock of fine-scale dendrites in solid particles in the spray to provide a high density of embryonic grains. © (2010) Trans Tech Publications. |
| first_indexed | 2024-03-06T22:12:41Z |
| format | Journal article |
| id | oxford-uuid:52574516-849a-4bbd-b68b-fa1a8d35c830 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:12:41Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:52574516-849a-4bbd-b68b-fa1a8d35c8302022-03-26T16:25:03ZModelling and experiments concerning dendrite re-melting and its role in microstructural evolution in spray formed Ni superalloysJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:52574516-849a-4bbd-b68b-fa1a8d35c830EnglishSymplectic Elements at Oxford2010Zhang, YGuo, ZZhang, GMi, JGrant, PThis paper presents a combined experimental and modelling approach to understand dendrite fragmentation of atomised metal alloy droplets during deposition in spray forming, and to study quantitatively the relationship between this dendrite fragmentation behavior and subsequent microstructural evolution. A Gleeble 3500 physical simulator was used to create controlled thermal shock conditions in solid-liquid mixtures of Ni superalloy IN718 atomised powders, which simulated the environment of droplet deposition during the twin-atomiser spray forming of large diameter IN718 alloy billets at BIAM. The experiments were complemented by phase field modelling studies at Oxford. Experiment and modelling supported the hypothesis that the characteristic equiaxed spray formed microstructure depends critically upon the rapid remelting and thermal shock of fine-scale dendrites in solid particles in the spray to provide a high density of embryonic grains. © (2010) Trans Tech Publications. |
| spellingShingle | Zhang, Y Guo, Z Zhang, G Mi, J Grant, P Modelling and experiments concerning dendrite re-melting and its role in microstructural evolution in spray formed Ni superalloys |
| title | Modelling and experiments concerning dendrite re-melting and its role in microstructural evolution in spray formed Ni superalloys |
| title_full | Modelling and experiments concerning dendrite re-melting and its role in microstructural evolution in spray formed Ni superalloys |
| title_fullStr | Modelling and experiments concerning dendrite re-melting and its role in microstructural evolution in spray formed Ni superalloys |
| title_full_unstemmed | Modelling and experiments concerning dendrite re-melting and its role in microstructural evolution in spray formed Ni superalloys |
| title_short | Modelling and experiments concerning dendrite re-melting and its role in microstructural evolution in spray formed Ni superalloys |
| title_sort | modelling and experiments concerning dendrite re melting and its role in microstructural evolution in spray formed ni superalloys |
| work_keys_str_mv | AT zhangy modellingandexperimentsconcerningdendriteremeltinganditsroleinmicrostructuralevolutioninsprayformednisuperalloys AT guoz modellingandexperimentsconcerningdendriteremeltinganditsroleinmicrostructuralevolutioninsprayformednisuperalloys AT zhangg modellingandexperimentsconcerningdendriteremeltinganditsroleinmicrostructuralevolutioninsprayformednisuperalloys AT mij modellingandexperimentsconcerningdendriteremeltinganditsroleinmicrostructuralevolutioninsprayformednisuperalloys AT grantp modellingandexperimentsconcerningdendriteremeltinganditsroleinmicrostructuralevolutioninsprayformednisuperalloys |