The Evolution of Defects in Deformed Cu-Ni-Si Alloys during Isochronal Annealing Studied by Positron Annihilation
| العنوان: | The Evolution of Defects in Deformed Cu-Ni-Si Alloys during Isochronal Annealing Studied by Positron Annihilation |
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| المؤلفون: | Zhi-Quan Chen, Danqing Yi, Yan-Lin Jia, Hui-Qun Liu, N. Qi |
| المصدر: | Chinese Physics Letters. 29:127803 |
| بيانات النشر: | IOP Publishing, 2012. |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | Materials science, Quantitative Biology::Neurons and Cognition, Condensed matter physics, Annealing (metallurgy), Precipitation (chemistry), Alloy, General Physics and Astronomy, chemistry.chemical_element, engineering.material, Crystallographic defect, Copper, Positron annihilation spectroscopy, Condensed Matter::Materials Science, chemistry, Vacancy defect, engineering, Hardening (metallurgy) |
| الوصف: | The effect of isochronal annealing on the deformation-induced defects in pure Cu and Cu-Ni-Si alloys is studied by positron annihilation spectroscopy. For the cold-rolled Cu, annealing up to 900°C causes a gradual recovery of the deformation-induced defects and monotonous decrease of the hardness. This indicates that its hardening is mainly related with defects such as dislocations. However, for the hot-rolled and quenched Cu-Ni-Si alloy, although there is a partial recovery of defects after annealing below 500°C, formation of additional defects is observed after annealing above 500°C. The hardness of Cu-Ni-Si alloy has a maximum value after annealing at 500°C, which suggests that the hardening of Cu-Ni-Si alloy is not due to defects, but primarily due to the precipitation formed during annealing. Further annealing of the Cu-Ni-Si alloy above 500°C results in over-aging effect and the precipitates lose coherence with the host matrix, which leads to positron trapping by vacancy clusters in the incoherent interface region. |
| تدمد: | 1741-3540 0256-307X |
| DOI: | 10.1088/0256-307x/29/12/127803 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::cc671717e63e55bf166f2ddb547e446b https://doi.org/10.1088/0256-307x/29/12/127803 |
| رقم الانضمام: | edsair.doi...........cc671717e63e55bf166f2ddb547e446b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 17413540 0256307X |
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| DOI: | 10.1088/0256-307x/29/12/127803 |