TY - GEN
T1 - Effects of Cu addition on age hardening response of Al-7Si-4Mg alloys at 130 °C
AU - Jauhari, Inas M.
AU - Bahar, Danny T.
AU - Nis, Syarah Khayrun
AU - Sofyan, Bondan T.
N1 - Publisher Copyright:
© 2020 Trans Tech Publications Ltd, Switzerland.
PY - 2020/1/1
Y1 - 2020/1/1
N2 - The effects of Cu addition of 0.38, 3.82, and 6 wt. % in Al-7Si-4Mg alloy on hardness and age hardening response were discussed. Samples were solution treated at 495 °C for 2 h, quenched, and aged at 130 °C for 0 to 498 h. Characterization included hardness test, microstructural observation by an optical microscope (OM) and Scanning Electron Microscope (SEM) combined with Energy Dispersive X-Rays Spectroscopy (EDX), as well as Simultaneous Thermal Analysis (STA) testing. The results showed an increased in as-cast hardness along with addition of Cu. Peak hardness increased to 64.47, 65.8, and 70.1 HRB by addition of 0.38, 3.82, and 6 wt. % Cu, respectively. The addition of Cu promoted the formation of Al2Cu and Al5Cu2Mg8Si6 which contributed to higher as-cast hardness. Formation of GP-zone, θ", and θ' was observed after ageing at 48, 240, and 290 °C, respectively and no effects of Cu was detected on the formation temperatures of the precipitates.
AB - The effects of Cu addition of 0.38, 3.82, and 6 wt. % in Al-7Si-4Mg alloy on hardness and age hardening response were discussed. Samples were solution treated at 495 °C for 2 h, quenched, and aged at 130 °C for 0 to 498 h. Characterization included hardness test, microstructural observation by an optical microscope (OM) and Scanning Electron Microscope (SEM) combined with Energy Dispersive X-Rays Spectroscopy (EDX), as well as Simultaneous Thermal Analysis (STA) testing. The results showed an increased in as-cast hardness along with addition of Cu. Peak hardness increased to 64.47, 65.8, and 70.1 HRB by addition of 0.38, 3.82, and 6 wt. % Cu, respectively. The addition of Cu promoted the formation of Al2Cu and Al5Cu2Mg8Si6 which contributed to higher as-cast hardness. Formation of GP-zone, θ", and θ' was observed after ageing at 48, 240, and 290 °C, respectively and no effects of Cu was detected on the formation temperatures of the precipitates.
KW - Ageing
KW - Al-7Si-4Mg
KW - Precipitation strengthening
UR - http://www.scopus.com/inward/record.url?scp=85083402430&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.833.74
DO - 10.4028/www.scientific.net/KEM.833.74
M3 - Conference contribution
AN - SCOPUS:85083402430
SN - 9783035715064
T3 - Key Engineering Materials
SP - 74
EP - 79
BT - Material and Manufacturing Technology X
A2 - Abdul Shukor, Mohd Hamdi Bin
A2 - Abdul Shukor, Mohd Hamdi Bin
A2 - Khovaylo, Vladimir
PB - Trans Tech Publications Ltd
T2 - 10th International Conference on Material and Manufacturing Technology, ICMMT 2019
Y2 - 26 April 2019 through 28 April 2019
ER -