Tracking the evolution of hot tears in aluminium alloys using high-speed X-ray imaging
Hot tears are detrimental defects forming during the final stage of solidification when the remaining liquid loses the capacity to compensate for liquid to solid volume shrinkage. Although a mature semi-quantitative description of hot tearing has been developed, little is known about the dynamic evo...
| Main Authors: | , , , , , |
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| Format: | Conference item |
| Language: | English |
| Published: |
IOP Publishing
2023
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| _version_ | 1826310655896977408 |
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| author | Han, I Feng, S Lui, A Wilde, F Grant, PS Liotti, E |
| author_facet | Han, I Feng, S Lui, A Wilde, F Grant, PS Liotti, E |
| author_sort | Han, I |
| collection | OXFORD |
| description | Hot tears are detrimental defects forming during the final stage of solidification when the remaining liquid loses the capacity to compensate for liquid to solid volume shrinkage. Although a mature semi-quantitative description of hot tearing has been developed, little is known about the dynamic evolution of hot tears as experimental studies have been conducted mostly post-solidification or in semi-static <i>in-situ</i> conditions. Here, we present a methodology to investigate the evolution of hot tears with high spatial and temporal resolution using synchrotron-based X-ray radiography. We develop a novel hot tear detection and tracking algorithm for quantification of hot tear density, area fraction and merging from the analysis of radiographic sequences of the solidification of thin metal samples. The methodology is demonstrated for an Al-5wt%Cu alloy and examples of the results and new insights that can be achieved are described. |
| first_indexed | 2024-03-07T07:56:40Z |
| format | Conference item |
| id | oxford-uuid:da5993cc-f660-45bc-991e-45d45cb0cca5 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:56:40Z |
| publishDate | 2023 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | oxford-uuid:da5993cc-f660-45bc-991e-45d45cb0cca52023-08-15T14:26:06ZTracking the evolution of hot tears in aluminium alloys using high-speed X-ray imagingConference itemhttp://purl.org/coar/resource_type/c_5794uuid:da5993cc-f660-45bc-991e-45d45cb0cca5EnglishSymplectic ElementsIOP Publishing2023Han, IFeng, SLui, AWilde, FGrant, PSLiotti, EHot tears are detrimental defects forming during the final stage of solidification when the remaining liquid loses the capacity to compensate for liquid to solid volume shrinkage. Although a mature semi-quantitative description of hot tearing has been developed, little is known about the dynamic evolution of hot tears as experimental studies have been conducted mostly post-solidification or in semi-static <i>in-situ</i> conditions. Here, we present a methodology to investigate the evolution of hot tears with high spatial and temporal resolution using synchrotron-based X-ray radiography. We develop a novel hot tear detection and tracking algorithm for quantification of hot tear density, area fraction and merging from the analysis of radiographic sequences of the solidification of thin metal samples. The methodology is demonstrated for an Al-5wt%Cu alloy and examples of the results and new insights that can be achieved are described. |
| spellingShingle | Han, I Feng, S Lui, A Wilde, F Grant, PS Liotti, E Tracking the evolution of hot tears in aluminium alloys using high-speed X-ray imaging |
| title | Tracking the evolution of hot tears in aluminium alloys using high-speed X-ray imaging |
| title_full | Tracking the evolution of hot tears in aluminium alloys using high-speed X-ray imaging |
| title_fullStr | Tracking the evolution of hot tears in aluminium alloys using high-speed X-ray imaging |
| title_full_unstemmed | Tracking the evolution of hot tears in aluminium alloys using high-speed X-ray imaging |
| title_short | Tracking the evolution of hot tears in aluminium alloys using high-speed X-ray imaging |
| title_sort | tracking the evolution of hot tears in aluminium alloys using high speed x ray imaging |
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