TY - GEN
T1 - Effects of bifilm on the response of artificial aging of aluminium alloy ADC12
AU - Sutrisno, Bernard Noventio
AU - Agustin, Helena Carolina Kis
N1 - Publisher Copyright:
© 2019 Author(s).
PY - 2019/6/26
Y1 - 2019/6/26
N2 - The high strength of aluminum alloy can be achieved by applying heat treatment aging. Nevertheless, the exact effect of the most common defect, bifilm, to the response of aging has not been known yet. Therefore, a research to know the effect of bifilm to the response of its aging on the most used aluminium alloy, ADC12, is conducted. In this research, ADC12 specimen casting was done three times with different stirring variations before liquid aluminium was poured to get various amount of bifilm. There were three variations: without stirring, three minutes stirring, and five minutes stirring. Ingot was used as the specimen comparison. These four specimens were given various treatments: T6 artificial aging (aging to form hardening precipitates), T7 artificial aging (over-aging), and without aging. The responses made by the alloy contained of bifilm were observed by using optical microscope and Scanning Electron Microscope (SEM). Element mapping observation of α-Aluminium phase that was far and near the bifilm was done. Microhardness Vickers testing was done on α-Aluminium matrix on areas both far and near the bifilm to obtain additional information regarding microhardness that correlates to precipitates from artificial aging. The T6 artificial Aging will increase tensile strength and hardness of the ADC12 aluminum alloy by transforming θ (Al2Cu) and Q (Al5Cu2Mg8Si6) phases into θ' (Al2Cu) and β' (Mg2Si) precipitates, which is coherent with its matrix, α-Aluminium. The result of the elemental mapping shows that there are different precipitate distributions of θ' and β' after the treatment of artificial aging on specimens. The α-Aluminium matrix microhardness from T6 artificial aging on specimens that contain almost zero bifilm is 101 HV, while on specimens that contain approximately 100 mm is 67 HV and 63 HV on areas near and far from bifilm. The T7 artificial aging treatment also shows the same microhardness pattern, which is on specimen that contains almost zero bifilm is 65 HV, and on specimen that contains approximately 100 mm is 55 HV (on both far and near the bifilm). It implies that bifilm affects the response of the artificial aging.
AB - The high strength of aluminum alloy can be achieved by applying heat treatment aging. Nevertheless, the exact effect of the most common defect, bifilm, to the response of aging has not been known yet. Therefore, a research to know the effect of bifilm to the response of its aging on the most used aluminium alloy, ADC12, is conducted. In this research, ADC12 specimen casting was done three times with different stirring variations before liquid aluminium was poured to get various amount of bifilm. There were three variations: without stirring, three minutes stirring, and five minutes stirring. Ingot was used as the specimen comparison. These four specimens were given various treatments: T6 artificial aging (aging to form hardening precipitates), T7 artificial aging (over-aging), and without aging. The responses made by the alloy contained of bifilm were observed by using optical microscope and Scanning Electron Microscope (SEM). Element mapping observation of α-Aluminium phase that was far and near the bifilm was done. Microhardness Vickers testing was done on α-Aluminium matrix on areas both far and near the bifilm to obtain additional information regarding microhardness that correlates to precipitates from artificial aging. The T6 artificial Aging will increase tensile strength and hardness of the ADC12 aluminum alloy by transforming θ (Al2Cu) and Q (Al5Cu2Mg8Si6) phases into θ' (Al2Cu) and β' (Mg2Si) precipitates, which is coherent with its matrix, α-Aluminium. The result of the elemental mapping shows that there are different precipitate distributions of θ' and β' after the treatment of artificial aging on specimens. The α-Aluminium matrix microhardness from T6 artificial aging on specimens that contain almost zero bifilm is 101 HV, while on specimens that contain approximately 100 mm is 67 HV and 63 HV on areas near and far from bifilm. The T7 artificial aging treatment also shows the same microhardness pattern, which is on specimen that contains almost zero bifilm is 65 HV, and on specimen that contains approximately 100 mm is 55 HV (on both far and near the bifilm). It implies that bifilm affects the response of the artificial aging.
UR - http://www.scopus.com/inward/record.url?scp=85068262089&partnerID=8YFLogxK
U2 - 10.1063/1.5112409
DO - 10.1063/1.5112409
M3 - Conference contribution
AN - SCOPUS:85068262089
T3 - AIP Conference Proceedings
BT - Exploring Resources, Process and Design for Sustainable Urban Development
A2 - Setiawan, Wisnu
A2 - Hidayati, Nur
A2 - Listyawan, Anto Budi
A2 - Hidayati, Nurul
A2 - Prasetyo, Hari
A2 - Nugroho, Munajat Tri
A2 - Riyadi, Tri Widodo Besar
PB - American Institute of Physics Inc.
T2 - 5th International Conference on Engineering, Technology, and Industrial Application: Exploring Resources, Process and Design for Sustainable Urban Development, ICETIA 2018
Y2 - 12 December 2018 through 13 December 2018
ER -