Revealing hot tear formation dynamics in Al-Cu alloys with X-ray radiography
Revealing hot tear formation dynamics in Al-Cu alloys with X-ray radiography
复制标题
通过 X 射线照相揭示 Al-Cu 合金中的热撕裂形成动力学
DOI:
10.1016/j.actamat.2023.119421
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发表时间:
2024
期刊:
影响因子:
9.4
通讯作者:
Han I
中科院分区:
文献类型:
--
作者:
Han I
Hot tears can arise during the late part of alloy solidification because of the shrinkage of isolated liquid as it turns to solid and may have a catastrophic effect on cast tensile properties. Although there are correlations to suggest alloy hot tear sensitivity to casting conditions, they do not capture the influence of microstructure on tearing, such as second-phase particles or intermetallic compounds (IMCs) commonly present in engineering alloys. We usein situX-ray radiography to quantify the formation and growth behaviour of hot tears in Al-5Cu and Al-5Cu-1Fe alloys during solidification. An automated hot tear detection, tracking and merging algorithm is developed and applied to reveal the role of Fe-rich IMC particles, typical of recycled alloys, on hot tear behaviour. These defects are termed hot tears here on the basis of their complex, extended inter-connected morphology, distinct from more rounded shrinkage porosity. We also visualise and quantify the velocity of interdendritic flow driven by solidification shrinkage, and estimate the pressure changes due to shrinkage. Hot tearing starts at lower solid fraction when IMCs are present due to reduced interdendritic flow, and hot tear formation is more spatially homogeneous, less clustered and more numerous. We show that the largest, most damaging hot tears form from many merging events, that is enhanced by the presence of IMCs.
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DOI:
10.1007/s11663-014-0100-5
发表时间:
2014-10-01
影响因子:
3
作者:
Nasresfahani, Mohamad Reza;Rajabloo, Mohamad Javad
通讯作者:
Rajabloo, Mohamad Javad
DOI:
10.7771/1932-6246.1117
发表时间:
2012-12-01
期刊:
JOURNAL OF PROBLEM SOLVING
影响因子:
--
作者:
Dry, Matthew J.;Preiss, Kym;Wagemans, Johan
通讯作者:
Wagemans, Johan
DOI:
10.1088/1757-899x/1281/1/012065
发表时间:
2023
期刊:
Materials Science and Engineering
影响因子:
--
作者:
Han I
通讯作者:
Han I
影响因子:
9.4
作者:
Liotti, E.;Lui, A.;Grant, P. S.
通讯作者:
Grant, P. S.
影响因子:
2.9
作者:
S. Feng;Insung Han;A. Lui;R. Vincent;Gideon Ring;P. Grant;E. Liotti
通讯作者:
S. Feng;Insung Han;A. Lui;R. Vincent;Gideon Ring;P. Grant;E. Liotti