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 - Funding Information:
The authors are grateful for provision of research fund from Ministry of Research, Technology, and Higher Education of Republic of Indonesia through the Master Leading to Doctorate Program for Excellent Scholar Grant (Hibah PMDSU), with contract No. 6266/UN2.R3.1/HKP05.00/2018.
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 -